Special steel, also called alloy steel, is a kind of steel. Special steel is the addition of one or several alloying elements in carbon steel in appropriate amounts.This gives the steel a variety of different special properties, such as strength, hardness, plasticity, toughness, wear resistance, corrosion resistance, and many other excellent properties.
bearing steel
structural steel
spring steel
high-speed steel
tool steel
Alloy cold work tool steel
High speed tool steel
AISI A8 type tool steel
S7 Shock-Resisting Tool Steel
AISI 440C bearing steel
Chrome Steel SAE 52100 bearing steel
100CRMNSI6-4 bearing steel
HIGH-CARBON BEARING STEEL 100CR6
S275JR Channel Steel
IPE 200 I-Beam Structural Steel
A53 Carbon steel Angle Steel
| Steel Specials B16 Bar Stock Component | Carbon | Manganese | Phosphorus, max | Sufur, max | Silicon | Chromium | Molybdenum | Vanadium |
| Wt. % | 0.36 – 0.44 | 0.45 – 0.70 | 0.035 | 0.04 | 0.15-0.35 | 0.80-1.15 | 0.50-0.65 | 0.25-0.35 |
Series | Main Alloy | Effect on Alloying Elements |
1000 | Non (99% Alum.) | Unalloyed aluminium is highly corrosion resistant, low strength, workable, conductive, Non-heat-treatable. |
2000 | Copper Based | Gives strength, hardness, machinability, Heat-treatable |
3000 | Manganese Based | Adds moderate strength, good workability. Non-heat-treatable |
5000 | Magnesium Based | Moderate to high strength. Corrosion resistant. Non-heat-treatable |
6000 | Magnesium & Silicon Based | Increase strength, formability, corrosion resistant. Heat-treatable. |
7000 | Zinc Based | For greatest strength. Heat-treatable. |
| Steel Specials B16 Bar Stock Mechanical Properties | Minimum | Comments |
| Tensile Strength, ksi | 125 ksi 110 ksi 100 ksi | up to 2 1/2 2 1/2 – 4 4 – 7 |
| Tensile Strength .02% Offset, ksi | 105 ksi 95 ksi 85 ksi | up to 2 1/2 2 1/2 – 4 4 – 7 |
| Elongation at Break | 18 % 17 % 16 % | up to 2 1/2 2 1/2 – 4 4 – 7 |
| Reduction of Area | 50 % 45 % 45 % | up to 2 1/2 2 1/2 – 4 4 – 7 |
Specifically, it has the following advantages.
1) High strength, high stiffness, good ductility, high plastic deformation capacity and low seismic action.
2) Better than ordinary steel materials to meet the requirements of long spans and large heights.
3) Excellent weather resistance and weldability, the latter can improve the welding quality and reduce the possibility of cracking at the welded nodes.
4) All factory-made, easy to process, transport and install, short construction period.
5) Simple and flexible arrangement of the components of the structure, saving the amount of steel used.
6) Strict control of trace elements, the quality of hot-dip galvanizing will be well guaranteed, and the appearance is beautiful and maintenance-free.
1.Mainly used in the manufacture of petroleum, chemical, gas separation and shipping
container or other similar devices, such as all kinds of tower vessels, heat exchangers,
torage tank and tank car, etc
2.Manufacture all kinds of stamping parts, construction and engineering structure and
some of the less important machine structure and parts.
3. Buildings and Bridges,Vehicles, towers and other structures.
4.Used as a floor, workshop escalator, working pedal, ship deck and car plate and so on
5.Make fixed boiler, boiler and other important hull attachments.
6.Pressure vessels, welding gas cylinder steel plate




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