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1.4112 is a high-carbon, high-chromium member of the stainless steel series. Due to its high carbon content, it provides high mechanical strength values as well as corrosion resistance after heat treatment. Good hardening and wear resistance. But it also sacrifices corrosion resistance due to the higher carbon content . 1.4112(X90CrMoV18) commonly known as AISI 440B.

Standard:

DIN EN 10088-3

Chemical composition

1.4112 material has a good capability of getting hardness. It containes ~%0.95 carbon element and because of high carbon, this grade is really good grade for high hardness. But since it contains ~%0.95 carbon, its corrosion resistance is not soo good.

Physical properties and mechanical propeties of 1.4112 stainless steel

• Thermal conductivity, λ_20℃: 15 W * m^-1 * K^-1
• Linear expansion coefficient, α = 10,4 * 10^-6 * K^-1
• Heat capacity, c_p = 430 J * kg^-1 * K^-1
• Resistance: 0,8 mkOhm * m
• Modulus of elasticity, E = 215 GPa
• Density = 7,7 g/cm³
• Hardness in annealed condition +1C, +1E, +1D, +1X, +1G, +2D: < 285HB
• Hardness after hardening and tempering of steel 1.4112 : 55-57 HRC

Application of 1.4112 stainless steel

1.4112 stainless steel is used in the manufacture of a variety of cutting tools, bearings, gauges, molds, valve components, blades.  And widely used in measuring instruments that require corrosion resistance in applications requiring both wear and corrosion resistance. Used in glass moulds, pumps and plastics industry.

Name: Joann

E-mail:joann@otaisteel.com

WhatsApp:+8613128068365

When we talk to  choosing the right steel for mould making, the most important is consider the precision and performance . Two popular options of mould steel are 1.2311 and 1.2738 steel. In this article, we’ll  analyzes from the chemical composition, physical properties and mechanical properties,  price, and applications of these two steels , hope to help you make an informed decision.

Chemical Composition 1.2311 VS 1.2738 steel:

1.2311 and 1.2738 steel belong to the category of plastic mould steels and exhibit different chemical compositions that influence their properties.

1.2311 steel, equivalent ASTM P20 steel.In contrast, 1.2738 steel, often referred to as P20+Ni steel, it easlier to find 1.2738 add 0.90%-1.20%  Nickel  base on 1.2311 , it means 1.2738 have a better strength than 1.2311.

Physical Properties 1.2311 VS 1.2738 steel :

Both steels have excellent machinability and polishability, therefore , both  1.2311 and 1.2738 steel are all suitable for mould making.

The little difference is the hardness between them. 1.2311 and 1.2738 steel both are pre-harden steel , but 1.2311 hardness is 28-34HRC , 1.2738 is 30-36HRC.

Mechanical Properties 1.2311 VS 1.2738 steel :

1.2311:

• Tensile Strength: 1050-1200 MPa.
• Yield Strength: 950-1100 MPa.
• Elongation: 15-20%.

1.2738:

• Tensile Strength: 1000-1150 MPa.
• Yield Strength: 900-1050 MPa.
• Elongation: 15-20%.

In summary, both 1.2311 and 1.2738 steel grades have similar tensile and yield strength along with comparable elongation properties, the key difference is their hardness, toughness, and impact resistance. 1.2311 steel offers good wear resistance and dimensional stability with slightly lower hardness, while 1.2738 steel provides improved toughness and impact resistance due to the addition of nickel, making it suitable for applications requiring enhanced mechanical properties under high-stress conditions.

Price compare :

Considering  prices, 1.2311 steel is generally more cost-effective than 1.2738 steel due to differences in their chemical compositions . However, the overall cost may vary depending on factors such as market demand and supplier pricing.

Applications :

1.2311 Steel:

• Widely used for low to medium-volume production of plastic molds, particularly for injection molding applications.
• Suitable for making prototypes and master models due to its good machinability and polishability.
• Often employed in industries such as automotive, consumer goods, and electronics for producing various plastic components and parts.
• Ideal for applications where moderate mechanical strength and wear resistance are required, making it a cost-effective choice for molding applications with lower stress and impact requirements.

1.2738 Steel:

• Preferred for applications requiring higher toughness and impact resistance, especially in large-sized injection molds and tooling for automotive components.
• Well-suited for molds subjected to high-stress conditions and impact loads, such as those encountered in automotive and aerospace industries.
• Due to its enhanced toughness and resistance to deformation under high-stress conditions, 1.2738 steel is commonly used in applications where reliability and durability are paramount.
• Offers superior performance in applications where the mold is subjected to frequent loading and unloading, as well as in situations where molds need to withstand abrasive wear and prolonged use.

In summary, both 1.2311 and 1.2738 steel grades have their respective applications in mold making, the key difference lies in the specific requirements of the application. 1.2311 steel is suitable for low to medium-volume production with moderate mechanical strength requirements, whereas 1.2738 steel is preferred for applications demanding higher toughness and impact resistance, particularly in large-sized molds subjected to high-stress conditions.

Conclusion:

In summary, both 1.2311 and 1.2738 steels offer excellent properties for mould making applications, with slight differences in their chemical compositions, hardness levels, and prices. The choice between the two ultimately depends on specific project requirements, budget considerations, and desired performance characteristics.

Otai special steel stock compelete size of 1.2311, 1.2738 steel, if there is any interest ,please contact below information to get the stock list.

Name: Joann

E-mail:joann@otaisteel.com

WhatsApp:+8613128068365

This week, I had a customer inquire with us about several mould steel NAK80, S136 and P20. We knew that these steels would be used in plastic molds, and he wanted to compare the prices of these materials. This article analyzes the differences between the above materials and helps customers choose the most suitable material.

Description of mould steel S136,NAK80 and P20:

S136 steel is chromium-nickel-molybdenum-vanadium alloy steel. As a high-quality plastic mold steel, S136 is widely used in injection molds, extrusion molds, blow molds and other fields. This mold steel has excellent corrosion resistance, polishability, wear resistance, and machinability, making it an ideal choice for manufacturing high-quality, high-precision plastic products.
NAK80 steel  is a kind of pre-hardened plastic mold steel, it is from Japan ,Daido . NAK80 steel generally used for mirror polishing molds, dustproof, TV filter plates, cosmetic boxes, precision wrinkle treatment molds, office automation equipment, auto parts electrical discharge processing molds, etc.
P20 steel  is an American standard pre-harden plastic mold steel. Widely used in China, factory hardness HRC30~42, suitable for large and medium-sized precision molds, suitable for long-term production of high-quality plastic molds, and used for large mold bases. This steel has good machinability and can be generally polished.

Chemical composition difference

Characteristic between mould steel S136 , NAK80 and P20

S136 mold steel

1. Corrosion resistance: It has excellent corrosion resistance and apply  in humid environments for a long time without rusting.
2. High hardness: It has high hardness and can maintain good hardness and wear resistance at high temperatures.
3. Excellent cutting performance: It has good cutting performance and is easy to process and manufacture.
4. Good heat treatment performance: It has good heat treatment performance and can obtain the required hardness and strength through heat treatment.
5.  Excellent wear resistance: It has excellent wear resistance and can maintain good surface finish and dimensional accuracy during long-term use.

NAK80 steel

1.  High hardness: NAK80 mold steel is pre-hardened steel, and its hardness can reach 37-43HRC before leaving the factory.
2.  Excellent polishing performance: very suitable for molds with high surface requirements, such as optical devices or injection molded parts
3. Ease of processing: NAK80 has very good processing performance, is easy to cut, mill and drill, and can meet the requirements of mold processing.
4. Good thermal stability: NAK80 can still maintain stable performance in high-temperature working environments. It has a low thermal expansion coefficient and excellent thermal conductivity, and can effectively resist plastic mold deformation and thermal stress caused by high temperatures.

P20 steel

1. Hardness: Factory pre-hardened, hardness 29-33HRC. Uniform hardness, good polishing performance and photo-etching performance, and good processing performance
2. It has excellent cutting performance and wear resistance, and can withstand high pressure and impact. Suitable for long term mold use.
3. P20 mold steel also has high strength and toughness and can withstand long-term mold work.
4. It has good heat resistance and corrosion resistance, making it the first choice material for plastic injection molds.

Application between mould steel S136 , NAK80 and P20

NAK80  Steel application :

Mould steel NAK80 widely used in plastic injection molds, die-casting molds and precision molds also in industries such as auto parts, home appliances, electronic products, and medical devices.

It is suitable for flat panel displays, cameras, audio equipment, transparent covers, films and other shell molds with mirror polishing requirements.

S136 steel application

S 136 is suitable for plastic molds with high corrosion resistance and mirror polish requirements.

Therefore  the highly smooth surfaces of S136 steel for the production of optical products, such as cameras, sunglasses, chemical instruments and plastic products;

P20 Steel application

• P20 is suitable for plastic molds and mold bases such as TV front casings, telephones, water dispensers, vacuum cleaners, etc.
• Thermoplastic plastic injection molds, extrusion molds.
• Thermoplastic blow molds. Heavy duty mold main components.
• Cold structural parts.
• Commonly used in manufacturing TV casings, washing machines, refrigerator inner casings, buckets, etc.

The difference of price between mould steel S136 , NAK80 and P20

P20 ＜ S136 ＜ NAK80

In conclusion

S136 , NAK80  and P20 are all good material widely used for steel mould.

But there are some application  differences.

• If you need a mold with good polishability and relatively high requirements, you can choose NAK80 steel.
• If you want to produce injection molds or extrusion molds with certain corrosion resistance but also have certain surface requirements, you can choose S136 steel.
• If you have a budget Limited, if the surface requirements are not high, you can choose the more cost-effective P20 steel.

Otai special steel stock more than 1500tons for S136 , NAK80  and P20 steel. If you want to get the stock list and the price details , please contact below information:

Name: Joann

E-mail:joann@otaisteel.com

WhatsApp:+8613128068365

1.3343 steel is a high-toughness high-speed steel containing a high proportion of tungsten and has the characteristics of high wear resistance and high efficiency. Grade 1.3343 is the HSS type steel. HSS refers to high speed steel grade. The grade is defined in the ISO 4957.This kind of steel has excellent comprehensive mechanical properties and good cutting performance. Therefore, it is widely used in various tool and mold manufacturing fields.

1.3343 is supplied with a hardness of 230HBS and can reach 64HRC after quenching and tempering.

Chemical composition and its equivalents

Physical properties of 1.3343

Mechanical properties of 1.3343

Heat treatment about DIN 1.3343 steel

Soft annealing:
820 to 850 °C for about 2 to 5 hours
slow controlled cooling of 10 to 20 °C per hour to about 550 °C;
further cooling in air. Maximum 270 HB

Hardening:
1190 – 1230 °C
Quenching in oil/compressed gas/air/hot bath
Min: 64 HRC

Tempering:

Min560 °C

Slow heating to tempering temperature (to avoid forming of cracks)
immediately after hardening;

Hardneess -tempering temperature -curves for 1.3343/H6-5-2C steel

Characteristic of 1.3343 HSS steel

1. High hardness, MinHRC64 after final heat treatment,
2. The carbides are fine and evenly distributed and have good wear resistance.
3. Good thermoplasticity.

Application of 1.3343 HSS steel

1. Particularly suitable for cold rutting dies and extrusion tools.
2. General toughness precision wear-resistant hardware cold stamping dies, cold extrusion blades, punches and dies.
3. Suitable for processing into various types of drill bits, milling cutters and other cutting tools.
4. Particularly suitable for tools subjected to vibration and impact loads.

Name: Joann

E-mail:joann@otaisteel.com

WhatsApp:+8613128068365

34CrNiMo6/1.6582 alloy steel  is high-strength engineering steel as per BS EN 10083-3:2006 . It  is widely used in the manufacture of important parts such as engine camshafts and connecting rods due to its excellent comprehensive mechanical properties.

What is 34CrNiMo6/1.6582 alloy  steel ? Below let’s  explain it from its chemical composition , properties , application etc aspect.

Chemical composition of 34CrNiMo6/1.6582 alloy steel and its equivalent steel

Mechanical  Properties of 34CrNiMo6/1.6582 alloy steel

Below is the mechanical Properties after QT in room temperture

Heat treatment of 34CrNiMo6/1.6582 alloy steel

The heat treatment of 34CrNiMo6 typically involves processes to achieve desired mechanical properties.

It’s essential to follow precise temperature and cooling rate guidelines during each step to achieve the desired microstructure and mechanical properties in the final product. Additionally, specific requirements for hardness, strength, and toughness will dictate the exact parameters of the heat treatment process. Consulting material specifications and/or a metallurgical engineer is recommended for precise heat treatment instructions.

Characteristic of 34CrNiMo6 steel

High Strength: 34CrNiMo6 has excellent high strength and is able to withstand high load and high stress conditions.

High toughness: The alloy has good toughness and is able to maintain structural integrity under high loads and avoid easy fracture.

Wear Resistance: Due to its alloy composition, 34CrNiMo6 has good wear resistance and is suitable for applications in high friction and high wear environments.

High-temperature properties: The alloy maintains a certain hardness and strength in high-temperature environments, making it suitable for high-temperature applications.

Application of  34CrNiMo6  steel

34CrNiMo6 material is widely used in manufacturing various high-load and high-wear parts, including but not limited to:

Gears and drive shafts: Used in automobiles, industrial machinery, aerospace and heavy equipment, etc.

Bearings: Bearings used to support rotating parts, such as engines and machinery.

Forgings and forging dies: Used to make forgings and forging dies, such as hammer heads and dies.

Oil and Gas Extraction Equipment: Used in the manufacture of drill bits, drill pipe and parts for oilfield equipment.

Stock and price

Otai stock 34CrNiMo6 more than  1000tons ,   size from 12mm to  600mm . If you have any interest , please contact :

Name: Joann

E-mail:joann@otaisteel.com

WhatsApp:+8613128068365

AISI 4340 steel is a medium-carbon low-alloy high-strength steel and a typical representative of low-alloy ultra-high-strength steel. It has good hardenability, well-matched strength and toughness, high fatigue strength and low notch sensitivity, high low-temperature impact toughness, and no obvious temper brittleness.

AISI 4340 steel standard

The execution standard for 4340 steel is ASTM A29/A29M-04

Chemical composition of AISI 4340 steel and equilvalent grade

Heat treatmemt

Quenching:AISI 4340 alloy steel heat treat at 830°C (1525°F) followed by quenching in oil.

Forging:AISI 4340 alloy steel is forged at 427 to 1233°C (1800 to 2250°F).

Cold Working:AISI 4340 alloy steel can be cold worked using all conventional methods in the annealed condition. It has high ductility.

Annealing:AISI 4340 alloy steel is annealed at 844°C (1550°F) followed by cooling the furnace.

Tempering:AISI 4340 alloy steel should be in the heat treated or normalized and heat treated condition before tempering. The tempering temperature for depends upon the strength level desired. For strength levels in the 260 – 280 ksi range temper at 232°C (450 F). For strength in the 125 – 200 ksi range temper at 510°C (950 F). And don’t temper the 4340 steels if it is in the 220 – 260 ksi strength range as tempering can result in degradation of impact resistance for this level of strength.

Hardening:AISI 4340 alloy steel can be hardened by cold working or heat treatment.

Physical properties

Mechanical Properties

AISI 4340 Steel Application

Due to  its high strength, toughness, and weldability. It finds applications in various industries, including:

1. Aerospace: Components such as landing gear, engine parts, and structural components in aircraft.
2. Automotive: Crankshafts, axle shafts, gears, and other critical components in high-performance engines and transmissions.
3. Oil and Gas: Drill collars, drill rods, and other downhole drilling equipment require materials with high strength and toughness to withstand harsh drilling conditions.
4. Marine: Components in marine environments, such as propeller shafts and crankshafts for ship engines.
5. Defense and Military: Applications include gun barrels, gears, and other components in firearms and military vehicles .
6. Industrial Machinery: Various industrial machinery components, including gears, shafts, and crankshafts, use 4340 steel due to its high strength and fatigue resistance.
7. Tool and Die Making: Dies, punches, and other tooling components benefit from the wear resistance and toughness of 4340 steel in applications such as stamping and forming.
8. Power Generation: Components in power generation equipment, such as turbine shafts and gears, utilize 4340 steel for its strength and resistance to fatigue and wear.
9. Heavy Equipment: Components in heavy machinery and equipment, such as axles, gears, and crankshafts in construction and mining equipment, rely on the high strength and durability of 4340 steel.
10. Racing and Motorsports: High-performance racing cars and motorcycles often use 4340 steel for critical components like crankshafts and connecting rods due to its strength and fatigue resistance.

Want to know  more about the AISI 4340 steel details and stock list ?

Pls contact : Joann

E-mail:joann@otaisteel.com

WhatsApp:+8613128068365

Two prominent categories of tool steels are hot work tool steel and cold work tool steel.  Hot work  steel and cold work steel and are two commonly used die steel materials. There are some differences between them in terms of material, processing technology and performance.Through a comparison of their applications, chemical compositions, and properties, we aim to provide a comprehensive understanding of their distinct characteristics.

Cold Work Tool Steel

Introduction:

Some engineer also call cold work tool steel as cold work mold steel. The  typical  steel grade like 1.2379,1.2080,1.2550 , DC53,1.2436 etc.Cold work tool steel is used in the processes that work under cold conditions, away from the heat.

Application:

Cold work die steel is mainly used to manufacture molds for pressing and forming workpieces in a cold state. Such as cold blanking dies, cold stamping dies, cold drawing dies, imprinting dies, cold extrusion dies, thread pressing dies and powder pressing dies, etc.  And some cutting tools  also request to use cold work steel.

When the cold work mold is working, due to the relatively low deformation resistance of the material to be processed, the working part of the mold is subject to great pressure, bending force, impact force and friction. Therefore, the mold needs to have high hardness, wear resistance and high wear resistance. Bending strength and sufficient toughness to ensure the smooth progress of the stamping process.

Chemical composition 

Cold work tool steel usually has a high carbon content (1.45% 2.30%) that makes it wear resistant and power scalable. On the other hand, high work tool steel has carbon content within the medium range (0.3% 0.6%) that matches its requirements for hardness, thermal conductivity, and wear-resistance.

Hot Work Tool Steel

Introduction:

Hot work tool steel is used for the manufacturing process that includes high abrasion.The use condition usaually in a high temperture condition.The  typical  steel grade like 1.2344,1.2343,1.2714 etc.

Application:

Hot work die steel is mainly used to manufacture molds for pressure processing of workpieces under high temperature. Such as hot forging dies, hot extrusion dies, die-casting dies, hot upsetting dies, etc.

The main characteristic of the working conditions of hot work molds is that they are in contact with hot metal. Therefore, the basic performance of hot work mold steel is to have high thermoplastic deformation resistance, including high temperature hardness and high temperature strength, high thermoplastic deformation resistance and good thermal resistance. Fatigue resistance. This ensures that the hot work mold has a long service life.

Chemical composition:

Hot work tool steels all contain a higher proportion of alloying elements to produce more carbides and handle higher operating temperatures. Hot work tool steel can operate at temperatures up to 1004°F (540°C). As a group, most hot work steel  have very low carbon levels, less than 0.6%.

Conclusion-Hot Work Steel vs Cold Work Steel

Cold work steel and hot work  steel are two commonly used die steel materials. There are some differences between them in terms of material, processing technology and performance.

Chemical Composition

First of all, the chemical composition of cold work  steel and hot work  steel are different. Cold work steel usually uses low alloy tool steel, such as Cr12, Cr12MoV, etc. Its main characteristics are high hardness, good wear resistance and strong impact resistance. Hot work  steel usually uses high alloy tool steel, such as H13, H11, etc. Its main features are high temperature resistance, good thermal fatigue resistance and strong impact resistance.

Processing technical

Secondly, the processing techniques of cold work die steel and hot work die steel are different. Cold work  steel is mainly formed through cold working processes, such as cold forging, cold drawing, cold heading, etc., to improve the hardness and strength of the material. Hot work die steel is mainly formed through hot processing processes, such as hot forging, hot rolling, hot drawing, etc., to improve the plasticity and toughness of the material.

Performance

In addition, there are some differences in performance between cold work die steel and hot work die steel. Due to its high hardness, cold work die steel is usually used to manufacture stamping dies, shearing dies and other molds that require high hardness and wear resistance. Due to its good high temperature resistance, hot work mold steel is usually used to manufacture die-casting molds, plastic molds and other molds that require high temperature resistance and thermal fatigue resistance.

Besides that , there are some different issues that need to be paid attention to during the use of cold work die steel and hot work die steel. During the use of cold work die steel, attention should be paid to cooling measures to avoid overheating, which will cause the hardness of the material to decrease. During the use of hot work steel, attention should be paid to preheating and insulation measures to improve the plasticity and toughness of the material.

To sum up, there are some differences between cold work die steel and hot work die steel in terms of material, processing technology and performance. The selection of appropriate mold steel materials requires comprehensive consideration based on specific usage requirements and process conditions.

Want to know  more about the cold work and hot work  steel stock list   ?

Pls contact : Joann

E-mail:joann@otaisteel.com

WhatsApp:+8613128068365

36CrNiMo4 steel  also known as  1.6511 steel, is an alloy structural steel that belongs to the standard EN 10250-3. It equivalent ASTM 4340 which commonly used in gears, shafts, piston parts,and aircraft, and various wear-resistant parts.

36CrNiMo4 Steels And Equilvalents Chemical Composition 

 Steel Mechanical Properties of 36CrNiMo4 Steels

The mechanical properties of 36CrNiMo4 steel are influenced by its composition and heat treatment. Here are typical mechanical properties for 36CrNiMo4:

1. Tensile Strength (Rm): 980 – 1180 MPa
2. Yield Strength (Rp0.2): 785 MPa (min)
3. Elongation at Break (A): 11% (min)
4. Impact Toughness (KV):
   • Charpy V-notch impact toughness values are typically specified.
   • Example: 27 J (at -20°C)
5. Hardness:28-34 HRC (Rockwell C).

These mechanical properties make 36CrNiMo4 suitable for applications where require high strength, toughness, and resistance to fatigue and impact .

Physical Properties of 36CrNiMo4 Steels

1. Density: 7.85 g/cm³ (0.284 lb/in³). This value represents the mass per unit volume of the material.
2. Melting Point: Around 1420-1470°C (2590-2678°F).

Heat treatment of 36CrNiMo4 Steel

1. Annealing:
   • Heated to a temperature between 850°C and 880°C (1562°F to 1616°F).
   • Held at that temperature for a sufficient duration after reaching the specified temperature.
   • Slow cooling in the furnace  then performed to relieve internal stresses and improve machinability.
2. Normalizing:
   • Normalizing involves heating the steel to a temperature above the critical range (about 850°C to 890°C or 1562°F to 1634°F) and then allowing it to cool in air.
3. Quenching:
   • Heated to a temperature typically between 850°C and 880°C (1562°F to 1616°F) and then quickly cooled by  oil or water.
4. Tempering:
   • After quenching, the steel reheate to a temperature between 550°C and 650°C (1022°F to 1202°F).
   • Tempering helps to relieve internal stresses induced during quenching and reduces the brittleness of the material.

36CrNiMo4 steel application

36CrNiMo4 steel  commonly use  for  various industrial applications where high strength, toughness, and fatigue resistance are essential. Here are some typical applications of 36CrNiMo4 steel:

1. Gears and Shafts:
   • Due to its excellent combination of strength and toughness, 36CrNiMo4 is frequently used for manufacturing gears and shafts in heavy-duty machinery and mechanical power transmission systems.
2. Aerospace Parts:
   • In the aerospace industry, especially in the production of aircraft parts, 36CrNiMo4 is adopted for its high tensile strength and fatigue resistance, making it suitable for critical parts subjected to dynamic loads.
3. Automotive Parts:
   • The steel is utilized in the automotive sector for manufacturing components such as crankshafts, connecting rods, and gears. Its ability to withstand high stress and fatigue makes it valuable in these applications.
4. Heavy-Duty Crankshafts:
   • 36CrNiMo4 commonly use  for the production of heavy-duty crankshafts for engines. Its high strength and toughness are beneficial for withstanding the dynamic loads experienced by crankshafts.
5. Oil and Gas Industry:
   • Components in the oil and gas industry, such as drill collars, gears, and other parts subjected to demanding conditions, may be made from 36CrNiMo4 due to its mechanical properties.
6. Mining Equipment:
   • The steel is suitable for components used in mining equipment, where durability and resistance to wear and impact are crucial.
7. Construction Machinery:
   • Various components in construction machinery, including gears, shafts, and structural parts, may be manufactured from 36CrNiMo4 to ensure reliability and performance.
8. Railway Industry:
   • Some railway components, like axles and gears in heavy-duty rail applications, may utilize 36CrNiMo4 for its strength and resistance to wear and fatigue.

In Conclusion

36CrNiMo4 is a chromium-molybdenum alloy steel known for its high strength and toughness. It falls under the category of engineering steels and applicate in  where require high tensile strength, fatigue resistance, and good hardenability.

Want to know  more about the 36CrNiMo4  steel details and stock list ?

Pls contact : Joann

E-mail:joann@otaisteel.com

WhatsApp:+8613128068365

Cr12MoV steel is a kind of high carbon and high chromium steel, it is belong to GB/T 1999-2000.  Typical steel types such as Cr12, Cr12MoV, Cr12Mo1V1, D2, SKD11,X12MF etc. Cr12MoV have a carbon content of over 1.40% and a chromium content of 11.00%~13.00% and has excellent properties such as hardenability, hardness and flexural strength. It is an important material for manufacturing stamping dies, cold forming dies and other molds. It is widely used in various curved parts and molds with large cross-sections and complex shapes.

Chemical Compostion and it’s equivalent Grade:

CR12MOV steel has improved the hardenability and hardenability of the steel due to the addition of appropriate amounts of chromium, molybdenum, vanadium and other alloying elements, making the material’s comprehensive mechanical properties after quenching much higher than other types of steel, and is widely used in the manufacture of molds.

Cr12MoV Steel Heat Treatment

Annealing

800 to 850°C
Slow controlled cooling in furnace at a rate of 10 to 20°C/hr down to approx. 600°C, further cooling in air. Hardness after annealing: max. 250 HB.

Stress relieving

650 to 700°C
Slow cooling in furnace; intended to relieve stresses set up by extensive machining, or in complex shapes. After through heating, hold in neutral atmosphere for 1-2 hours.

Hardening

980 to 1010°C
Oil, salt bath (220 to 250°C or 500 to 550°C), air blast, still air. Tools of intricate shape or with sharp edges should preferably be hardened in air or salt bath. Holding time after temperature equalization: 15 to 30 minutes.
Obtainable hardness: 63 – 65 HRC

Tempering

Slow heating to tempering temperature immediately after hardening/time in furnace 1 hour for each 20 mm of workpiece thickness but at least 2 hours/cooling in air.
For certain cases we recommend to reduce tempering temperature and increase holding time

Cr12MoV Steel Delivery Condition:

Annealed , 207-255HB

Cr12MoV Steel Application:

Cold work dies

1. Cr12MoV steel is widely used in the manufacture of cold work dies with large cross-sections, complex shapes, large impact forces, and high wear resistance requirements, such as silicon steel sheet punching dies, cold cutting scissors, trimming dies, thread rolling dies, wire drawing dies, rolling dies, etc. Wire plate, thread rolling die, complex-shaped punching die, steel plate drawing die, etc.
2. The service life of the rolls used to replace Cr2 steel in manufacturing rolled and welded steel pipes is increased by more than 7 times.

Extrusion punches

1.  For pure aluminum blank reverse extrusion punches made of this steel, when the pressure is about 1000MPa, the life of the punch is guaranteed to be more than 50,000 pieces. The main failure modes are wear and surface roughening.
2.  Used to manufacture punching dies with material thickness >3mm, punch dies, concave dies, and inserts with complex shapes. The recommended hardness is 58-62HRC when making punch molds, and the recommended hardness is 60-64HRC when making concave molds.
3.  Used to make punches and concave dies that require high wear resistance in punching dies. When making punches, the recommended hardness is 60-62HRC, and when making concave dies, the recommended hardness is 62-64HRC.
4.  Used to manufacture concave dies that require high wear resistance in drawing dies. The recommended hardness is 62-64HRC.
5. Used to manufacture punches, concave dies, and inserts that require high hardness and complex shapes in bending dies. The recommended hardness is 60-62HRC when making punches, and 60-64HRC when making concave dies.
6.  Used to make cold extrusion dies for aluminum parts. The recommended hardness for making punch molds is 60-62HRC, and for making concave molds, the recommended hardness is 62-64HRC.
7. Used to manufacture cold extrusion concave and convex molds for copper parts. The recommended hardness is 62-64HRC.

Bend spring steel plates

1.  Used to bend spring steel plates with a carbon content of 0.65%-0.80% (mass fraction), a hardness of 37-42HRC, and a service life of up to 150,000 times. If nitriding treatment carry out, the service life can reach 400,000 times.
2. When used to manufacture thread rolling dies for processing 20Mn steel, after repeated upsetting and elongation, the carbide unevenness of the blank is ≤3, then the service life of the thread rolling dies will be increased from the original 20,000 pieces to 500,000 pieces.

Plastic molds

1.  Used for manufacturing thermosetting plastic forming molds and general plastic molds.
2. Cr12MoV steel stainless steel mold vacuum quenching + gas nitriding. At present, most domestic stainless steel molds are made of Cr12MoV steel.

Want to know  more about the Cr12MoV steel details  ?

Pls contact : Joann

E-mail:joann@otaisteel.com

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DIN 1.2080 also know as X210Cr12 steel ,it  belongs to  standard DIN EN ISO 4957. It is a widely used cold work steel with high strength, good hardenability and good wear resistance. It mainly used for cold punching dies and punches, cold cutting scissors, drill sleeves, gauges, wire drawing dies, stamping dies, thread rolling dies, drawing dies and thread rolling dies that bear small impact loads and require high wear resistance.

DIN 1.2080 Introduction

DIN 1.2080 steel is a high-carbon, high-chromium ledeburite steel . This steel has good hardenability, wear resistance, and hot workability. However , the composition don’t add VCarbides are well distributed in the steel and can be used for manufacturing Various cold work dies with complex shapes and heavy working conditions. Such as cold die punches, thread rolling dies, wire drawing dies, material dies, metallurgical powder dies, woodworking cutting tools, cold cutting scissors, drill sleeves and gauges.

DIN 1.2080 Steel and its Equivalent Chemical composition  :(%)

Characteristic:

1. Vacuum degassing and refining treatment make the steel pure.

2. Spheroidizing annealing and softening treatment, good cutting performance.

3. The strengthening element vanadium and molybdenum are specially added to provide extremely excellent wear resistance.

Application:

1. Thickness no more than 2MM thin plate, high-efficiency blanking die, punching die and stamping die.

2. Various scissors, inlaid blades, woodworking blades.

3. Thread rolling die and wear-resistant slider.

4. Cold heading mold, thermosetting resin molding mold.

5. Stretch forming mold and cold extrusion mold.

Mechanical Properties:

Physical Properties:

DIN 1.2080 Steel Heat treatment :

Delivery status:

The steel is delivered in an annealed state.

Conclusion:

DIN 1.2080 mold steel is also one of the internationally used cold work mold steels, but has recently been gradually replaced by better steel types such as Cr12MoV, Cr12Mo1V1 or matrix steel. It is mainly used for cold stamping die working parts that require high wear resistance and small impact load (punch and concave dies), cold extrusion die concave dies, etc. Although its use is subject to certain restrictions due to its obvious advantages and disadvantages, it is still used in some specific areas are still irreplaceable.

Want to know  more about the DIN 1.2080 ( X210Cr12 ) /D3/SKD1 steel details  ?

Pls contact : Joann

E-mail:joann@otaisteel.com

WhatsApp:+8613128068365