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

65Mn spring steel

65Mn Spring Steel/1066/080A67/SUP3/C67E

We understand that material selection can make or break a project. It is the difference between a component that lasts for decades and one that fails prematurely under pressure. Today, […]

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16MnCr5 for gear

DIN16MnCr5 steel/1.7131/20MnCr5/15CrMn/5115

 Today, we are peeling back the layers on one of the most misunderstood yet highly utilized engineering steels in the world: DIN 16MnCr5 steel. If you are in the automotive, […]

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1.2083 steel round bar -Otai

1.2083 Steel Equivalent: X40Cr14/420/4Cr13/S136

1.2083 ( X40Cr14) steel is belong to German standard EN ISO 4957-2000 which is a plastic mold steel. 1.2083 steel equivalent to the AISI 420,GB 4Cr13 and the JIS SUS420J2 […]

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