TOP TOOL STEEL & SPECIAL STEEL SUPPLIER IN CHINA

SUPPLY TOP QUALITY TOOL STEEL WORLDWIDE

Why Us

Over 20 Years Experience

Otai is over 20 years experienced for 4140 plate, 4140 round, 8620 round, 4340 round bar. We know customers concern and avoid the problems on delivery.

ISO 9001 Certified & SGS

We are ISO9001:2015 certified and our supplied products also pass SGS inspection. Quality is key to win long term cooperation customers.

10000+ Tons 4140 Plate

As No. 1 Stockist of AISI 4140 steel plate, we keep daily stock of over 10000 tons from 4mm to 300mm thickness. Machined pieces are also available.

Professional Staff

Our skilled and professional staff will solve your problems and worries pre sales or after sales. You are comfortable during our cooperation.

Featured Customers

BOHLER-
fastenal, otai supplies 1045 and 4140 steel round bar.
thyssenkrupp , otai supplies carbon steel and alloy steel
schlumberger- otai supplies 8620 steel round bar
UDDEHOLM-

Latest News & Blog

O1 Tool Steel | 1.2510 | 100MnCrW4 | SKS3

O1 Tool Steel | 1.2510 | 100MnCrW4 | SKS3

What Exactly Is O1  Steel? Let’s start with a simple truth: O1 steel is not a mystery. It is a low-alloy, cold-work tool steel that must be oil-quenched during heat treatment. That […]

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DIN 1.2083 vs DIN 1.2316: Which Stainless Mold Steel Better?

DIN 1.2083 vs DIN 1.2316: Which Stainless Mold Steel Better?

Let me ask you a straight question: Are you overpaying for corrosion protection you don’t need—or under-buying and risking mold failure? That’s the real battle between DIN 1.2083 and DIN 1.2316. […]

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1.2083-round-bar-Otai

DIN 1.2083 /420 /SUS420J2/4Cr13/X42Cr13 Steel

Have you ever watched a stainless steel kitchen knife resist rust after hundreds of washes? That’s the kind of reliability we build into 1.2083 steel. At Dongguan Otai Special Steel, […]

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