About Us 2017-12-27T11:48:53+00:00


Established in 1999, first begin with Yao Teng Steel Brand, Otai Steel supplies a wide range of carbon, alloy and stainless steel products, including high speed tool steel, cold works tool steel, hot works tools steel, plastic mould steel, engineering steel and machine structural steel etc. After almost 20 years development and growing, Otai Steel becomes one comprehensive special steel factory, stockist and exporter.

Combined with experienced exporting team and professional technical knowledge, Otai Steel offers both technical advice and support, as well as global professional steel solution and service.

Due to satisfactory reliable quality and professional service, Otai expands our market worldwide, such as UAE, Canada, Brazil, Colombia, Chile, Spain, Turkey, Algeria, Vietnam, Malaysia and so on.

Our Mission, Philosophy & Vision

Since commence, Otai Steel strives to become one of the leading special steel supplier in the world. We persist in reliable and good quality high speed tool steel, cold works tool steel, hot works tool steel, plastic mould steel and alloy & carbon engineering steel supply for industrial, military and other applications.
  • Quality is Otai Steel’s life.
  • Reliability is Otai Steel’s code.
  • Customer Satisfaction is Otai’s final goal.
Otai Special Steel Co is aimed at building wide and firm strategic relationship with customer all over the world on long term and mutually benefit basis.

We Specialize in Tool Steel & Alloy Steel

high speed tool steel

High Speed Steel

Otai supplies high speed steel in AISI M2, M35, M42 etc. HSS is widely used for saws, planer knife, high speed cutter and other special uses.

hot works tool steel

Hot Works Tool Steel

Otai Steel provides hot works steel like AISI H13, H11, H21 etc. It is widely used as aluminum die casting, pressing mold, forging mold etc.

cold works tool steel

Cold Works Tool Steel

Otai Steel supplies cold work mould steel in AISI D2, D3, O1, A2 etc. It’s widely used for punch mold, knife mould, screw mold, rolling roller etc.

plastic mould tool steel

Plastic Mould Steel

Otai supplies AISI P20, P20+S, NAK80 etc for pre-hardened pouring mold, mold of polishing glasses, mould of mirror surface. etc.

alloy engineering steel

Engineering Steel

Otai steel supplies AISI 1045, 4140, 4130, 4340, 52100, etc. It’s widely used in aerospace, industrial engineering, mechanical industry.

Download E-Catalogue

Processing & Design

  • tool steel, engineering steel design and delivery
  • finished-steel tube or bar product-processing
We could supply cut to size service for tool steel and engineering steel, according to given size and dimension. This would save your energy and labour cost, we could supply your final required size.
We supply machined, milled or grounded surface condition for different steel grades of tool steel and alloy steel. Diameter tolerance and size tolerance would meet ISO standard.
If you have the drawing, please send to us and we could supply it, as per the required steel grades and drawing dimension.
If you have nothing but you would need some kind of steel products. Inform us what you need, and we could design and supply to you.

ISO9001:2008 Quality Control

Otai Steel Co Ltd supplies wide range of forged, hot rolled, cold rolled, cold drawn and cast steel materials from ISO 9001 certified mills. We have lots of stock materials for fast delivery:

  • Round steel bar,
  • Flat bar,
  • Steel plate,
  • Steel sheet
  • Hexagon bar


Chemical composition analysis is so important for tool steel and alloy steel. We are equipped with Japan’s Olympus brand spectrometer, XRF Analyzer. We check the chemical composition each heat to ensure the materials is with top quality in chemical composition.

  • AISI
  • DIN
  • JIS
  • BS EN

tool steel chemical-composition-analysis

Otai Steel delivers different steel round bar, flat bar, steel plate, hexagon and other steel shapes, with various heat treatments condition for your final uses:

  • Quenching-Q
  • Normalizing-N
  • Tempering-T
  • Annealing-A

steel material heat-treatment

We would do Ultrasonic Test for all our supplied teel products to guarantee the steel materials quality. The main standard for the UT class is DIN SEP 1921-84. Our materials could meet the UT Class C/c, Class D/d or E/e requirements.

.a-ut-test for all tool steel and alloy steel

According to your different requirements, we supply tool steel and alloy steel in the below surface condition:

  • black
  • roughly peeled
  • turned
  • milled
  • grounded
  • polishing
We supply tool steel materials and engineering steel according to standard tolerance or customer’s required tolerance.

size tolernace dimension measurement

  • For container shipment,

Standard packing and bundle round bar and flat bar would be applied. Necessary fasten & reinforcement would be done to ensure the safety and better unloading at the destination port.

  • For less than container shipment,

Wooden box package would be applied for different size materials. For milled or grounded materials, the anti rust oil would be needed to ensure the surface condition, within the wooden box.

MTC is available for each shipment, after all inspect results are available.  You have the sample MTC as below:

sample MTC
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