SKS51 | High Carbon Steel｜TOKUSHU KINZOKU EXCEL CO., LTD.(TOKKIN)

Unless otherwise specified, we manufacture in accordance with JIS standards.
［note 1］"M" at the end of JIS steel grade symbol means steel grade corresponding to JIS G3311 Cold rolled special steel strip, and M may be abbreviated in some cases.

Overseas standards are listed as equivalent or similar to our materials, so please use them as a reference.

JIS

SKS51M (G3311)

AISI/SAE

Chemical Composition

Physical Properties

The following values are typical values for high carbon steel(Fe-0.8C).

Density

7.84 g/cm³

Specific Heat

490 J/(kg・K)

Electrical Resistivity

18 μΩ・cm

Young's Modulus

208 GPa

Thermal Expansion

11.0×10^-6/K（0～100℃）

Thermal Conductivity

50.2 W/(m・K)

Magnetism

Strong

Mechanical Properties

Although cold rolled special steel is usually supplied in a rolled condition (as-rolled or rolled finish), we can manufacture it from the softest annealed finish to the hardest full hardened finish.
You can select the finish that best suits your needs and application.

Quenching and Tempering

SKS51 is a steel grade that can be quenched.
The general quenching condition is ［Oil cooling at 790～850℃(Water Cooling at 760～820℃ ) ］.
After holding for tens of seconds to several minutes depending on sizes, shapes, required properties, and quenching method, cooling is performed.
Water cooling is harder to quench, but due to the risk of quenching distortion and quench cracking, oil cooling may be used in some cases.
Please select tempering temperature according to required hardness and toughness by referencing quenching and tempering curve.

Cold Rolled Special Steel Strips

We manufacture carbon steel (SC material) and carbon tool steel (SK material) that conform to "JIS G 3311 Cold Rolled Special Steel Strip" and "JIS G 4802 Cold Rolled Steel Strip for Springs", as well as our own composition-adjusted steel grades for special applications.

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