Performance Characteristics:
Vacuum deairing with fine steel, it is easy for cutting after quenching ,high hardness, good abrasion resistance ,dimension stability and minimal distortion.
Applications:
It is suitable for cutting tools, such as broach, filament hammer and gauge and complex shape of cold mould, plastic mould, precise screw, etc.
Chemical Composition (%):
C ：0.85～0.95 Si：≤0.40 Mn：0.90～1.20
S ：≤0.030 P ：≤0.030 Cr：0.50～0.80
Ni： ≤0.25 Cu： ≤0.30 W ：0.70～1.2
Heat Treatment Standard:
Quenching, 800 ~ 830 centigrade cold oil.
Forging:
Oil quenching cold die has crack sensitivity,so it should not be quickly heated,it had better for a preheating in 650-750 centigrade .The temperature of forging is 1130-1150 centigrade, eventually temperature should be more than 800-850 centigrade, steel ingot take upper limit temperature.while blank forging take lower temperature.
Delivery condition:
Annealing
