SKD 1 1 is a universal cold working die steel with high wear resistance and toughness, high carbon and high chromium alloy tool steel and vacuum degassing refined steel. The steel is pure and has good hardening ability, good hardenability and small quenching deformation. After spheroidizing annealing and softening treatment, the steel has good machinability, fine and uniform carbide particles, and there is no need to worry about the special addition of quenching cracking strengthening elements molybdenum and vanadium.

Its chemical composition is:

Si Si ≤0.40

Mn Mn ≤0.60

Phosphorus ≤0.030

Sulfur ≤0.030

Cr Cr 1 1.0- 13.0

Momo 0.80- 1.20

NiNi ≤0.50

Vanadium 0.20-0.50

Cu and Cu ≤0.25.