LEADING TOOL STEEL & ALLOY STEEL SUPPLIER

SUPPLY TOP QUALITY TOOL STEEL WORLDWIDE

Why Us

Over 20 Years Experience

Otai has over 20 years of professional experience for 4140 / 42CrMo4 plate, 4140 round, 1.2738 steel plate, and 34CrNiMo6 round bar etc. We know customers’ concerns and avoid problems with delivery.

ISO 9001 Certified & SGS

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

10000+ Tons 4140 Plate

As the No. 1 Stockist of AISI 4140 / 42CrMo4 steel plate, we keep daily stock of over 10000 tons from 4mm to 300mm thickness. Machined and finished ground 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

UDDEHOLM- buys from otai continuously
fastenal-buys from Otai for fasten products
thyssenkrupp is also our key important customer on plastic mold steel material
schlumberger-buys 8620 steel round bar from Otai with required technical specification
BOHLER is OTAI's VIP customer in alloy steel and tool steel

Latest News & Blog

ASTM A36 vs Q235: Why Does ASTM A36 Contain More Than 0.20% Copper?

ASTM A36 vs Q235: Why Does ASTM A36 Contain More Than 0.20% Copper?

STM A36 and Chinese Q235 are both widely used carbon structural steels. Their chemical compositions and mechanical properties are relatively similar, but they are not completely equivalent. One interesting difference […]

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How to Cut D2 Steel More Efficiently and Reduce Processing Costs

How to Cut D2 Steel More Efficiently and Reduce Processing Costs

1.Is D2 Easier to Cut Before or After Heat Treatment? This is a very important question for steel stockists and tool manufacturers. The answer is straightforward: D2 should normally be […]

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Cutting D2 Tool Steel: How to Reduce Saw Blade Consumption

Cutting D2 Tool Steel: How to Reduce Saw Blade Consumption

Although D2 is naturally more difficult to cut than ordinary carbon steel, proper equipment and cutting parameters can significantly improve performance. 1. Choose the Right Saw Blade For annealed D2, […]

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