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

Which is cheaper, Cr12MoV or D2

Cr12MoV is generally cheaper than D2 tool steel. I n most global markets, Cr12MoV typically costs about 20%–30% less than D2, depending on size, manufacturer, and processing requirements. The main […]

Read more

Can Cr12MoV Replace D2 Tool Steel

Yes — Cr12MoV can often replace D2 tool steel, but not in all applications. While they are very similar in composition and performance, there are important differences you should understand […]

Read more

Does 1.2738 Mold Steel Reduce Cracking Risk?

  Short answer: Yes — 1.2738 Mold Steel is designed to reduce cracking risk, especially in large molds. But why? 💡 The Key Reason: Nickel (Ni) Addition 1.2738 contains Nickel, […]

Read more