BS S156 alloy steel also referred to as nitriding steel, is the VAR version of S82.

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Typically, we supply the alloy in the normalised and softened delivery condition.

Performance:

After surface treatment, the material offers a hard and durable wear-resistant surface making the product ideal for high-performance gearboxes in the motorsport sector. BS S156 offers high tensile strength ranging from 1,320 to 1,520 MPa. The alloy should be supplied in the heat-treated condition for fabricated parts, which involves carburising, hardening, and tempering.

Manufacture:

The material is manufactured by consumable electrode vacuum arc remelting (VAR) and is a 4% Ni-Cr-Mo case-hardening steel.

What is case hardening:

Case hardening is a heat treatment process which hardens the outer surface of the material while leaving a softer inner core. In steel manufacture, the process results in alloys which typically offer improved wear and abrasion-resistant qualities due to the harder outer surface. Typical case hardening processes include nitriding,

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