Description:

Uniform microstructure, free cutting and good polishing, High tenacity, ductility and high wear resistance in high temperature, Excellent hardenability and good heat resistance, Small deformation during heat treatment.

Physical properties:

Modulus of Elasticity (E): 210000MPa.

Coefficient of linear expansion:

Temperature (℃)      Coefficient of linear expansion (℃-1)

20～100               9.1×10-6

20～200               10.3×10-6

20～300               11.5×10-6

20～400               12.2×10-6

20～500               12.8×10-6

20～600               13.2×10-6

20～700               13.5×10-6

Temperature (℃)        thermal conductivity λ/W·(m·K)-1:

25                         32.2

650                        28.8

Heat treatment:

Quenching, 790℃ preheating, 1000℃ salt bath, holding 5~15 min, air cooling

Tempering: 550℃

Delivery condition:

Annealed

Application:

Widely used for hot extrusion dies, dies for mandrels and forging hammers, die-casting mould for aluminum, copper and its alloys