1.Material: DC53(equivalent to SKD11) Hardness: 60-63HRC
2.Material: SKH51 Hardness: 61-64HRC
3.Material: HAP40(SKH40) Hardness: 64-67HRC
Vacuum furnace heat treatment and advanced tempering technology enable the DC53
(EQUIVALENT TO SKD11 ) has better properties in toughness, grind resistance and
hardness at high temperature compared to SKD11 and SKD12. The strength at the joint
part of shoulder and pin has been significantly increased.