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

Why Is 1.2316 Different From Ordinary Mold Steel?

When choosing mold steel, many engineers and purchasing managers ask the same question: “Why should I pay more for 1.2316 instead of using ordinary mold steel like P20 (1.2311) or […]

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SAE AISI 5140-STEEL-PLATE SUPPLIER, EXPORTER, DISTRIBUTOR

1.2316 Large Plates – Premium Corrosion-Resistant Mold Steel for High-End Plastic Molds

What Is 1.2316 Steel? 1.2316 is a chromium-molybdenum stainless plastic mold steel developed specifically for molds operating in humid or corrosive environments. Compared with ordinary mold steels such as 1.2311 […]

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How to Buy 4140 Steel: A Complete Purchasing Guide

How to Buy 4140 Steel: A Complete Purchasing Guide

Choosing the correct steel grade is only the first step. Selecting the right supplier, delivery condition, size, testing requirements, and quality standard is equally important. Many buyers focus only on […]

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