Otai Steel supplies a wide range of steel products, including high speed tool steel, cold works mould steel, hot works mould steel and plastic mould steel. After 20 years development and growing, Otai Steel becomes one comprehensive special steel manufacturer, stockiest 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.

1. Established in 1995, first begin with Yao Teng Steel Brand, Otai Steel supplies a wide range
of steel products, including high speed tool steel, cold works mould steel, hot works tool
steel and plastic mould steel, and engineering steel. After 20 years development and
growing, Otai Steel becomes one comprehensive special steel manufacturer, stockiest 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 quality and professional service, Otai expands our market worldwide,
such as UAE, Canada, Brazil, Colombia, Chile, Spain, Turkey, Algeria, Vietnam, Malaysia and
so on.
OTAI STEEL
SPECIAL STEEL, TOOL STEEL, ENGINEERING STEEL

2. HIGH SPEED STEEL
• Abbr as HSS, is an alloy steel that combines several metals.
Combinations often include tungsten, chromium, molybdenum,
cobalt and others. Tungsten is the most common type of steel
currently used in these products. To improve hot hardness, cobalt
may also be added.
• As high performance steels HS-high speed grades offer high
hardness at temperatures up to 500°C and high wear resistance.
High speed steel has more advantages to the standard high carbon
tool steel specifications.
• High speed steel (or HSS) is often used in the manufacture of
different cutting tools, such as drills, taps, milling cutters, tool bits,
gear cutters, saw blades, planer and jointer blades, router bits, etc.,
although usage for punches and dies is increasing.
• Common Steel Grades: M2, M35, M42

3. Hot Work Steel
• Hot works tool steel is an alloy steel that remains hard at a red
heat; used to make metal-cutting tools.
• High hot hardness, good high temperature toughness and
resistance to heat checking are the most important factors in
choosing this hot work tool steels material. A hot-work tool steel’s
functionality is defined by its chemical composition, the technology
applied during production and by the ensuing heat treatment. In
general, hot-work steels are of the medium and high-alloy type and
most of them has relatively low carbon content (0.25 to 0.6%).
• Typical applications for hot works tool steels are: pressure die
casting, hot extrusion, open die forging, plastic processing.
• Common Steel Grades: H11, H13, H21

4. Cold Works Tool Steel
• Cold work steels are used where the product material being
processed is in an unheated or cold condition, usually used at
operating temperatures below 200 °C.
• Cold works tool steel has typical properties: high hardness, good
toughness and compressive strength and high wear resistance. High
availability, cost efficiency and a long tool life are the most
important factors in choosing cold work steel materials.
• Cold work tool steel are widely used in applications such as,
stamping, bending, roll forming, and cold forging. Steels in this
category generally are alloyed with elements to provide strength,
wear resistance, and impact and bending resistance. Cold work
steels generally are heat treated to high hardness levels to impart
the desired properties.
• Common Steel Grades: D2, D3, A8, O1

5. Plastic Mold Tool Steel
• Plastic Mould/Mold Steels are tool steels used for production of
plastic parts. The most important characteristics are durability and
hardness, toughness, wear resistance, polishability, corrosion
resistance hand thermal heat conductivity. Important customer
groups are in the automotive, consumer goods industry, electronics
and other industries that use plastic components. Application areas
are blow molding, form pressing, form blowing, extrusion and
holder materials.
• Rapid development in plastics processing and new applications for
plastics, require new plastic mould steel grades. Plastic mould steels
such as P20/1.2311, 1.2083, 1.4028, 1.2316 and 1.2085, currently
available on the market, are often not able to fulfill the high
requirements of the plastic processing industry. Modern plastic
steel products have to fulfill different industrial demands and
perform under different conditions in use.
• Common Grades Steel: P20, P21, 420

6. Engineering Steel
• Engineering steel are usually alloy steels which
can be heat treated to achieve a wide range
tensile strengths and mechanical properties,
common steel grades like 4140, 4340 etc.
However, medium-carbon steels are also used in
engineering steel applications, like C45, 1020
steel grades etc. Engineering steel grades are
used widely for applications requiring high tensile
properties, such as shafts, gears, bolts, axles etc.
• Common Steel Grades: C45/1045, 4140, 4340