Hot-working Die Steel,H21,DIN1.2581,SKD5
good hardenability, resistance to wear and thermal fatigue
good quality and fine workmanship
Mechanical Property
Annealed Hardness: HB 255 ~ 207
Quenching Hardness: HRC 49~52
Delivery Condition
Forged + Annealed + Machining (Peeled/Turned)
Specification:
Flat:(Widthness:50-1200mm,Thickness:20-500mm)
Round:50-500mm
Application:
H21 can be used to make punch and matrix under high temperature and high stresses without
shock loads, such as punch and matrix used in horizontal forging machine, embedded lump,
copper alloy extrusion mould, die casting mould. It also can be used to make the mould which
has larger resistance to pressure stress, bending stress or tensile strength, such as backward
extrusion mould. What's more, it can be used to make hot metal cutter under stress in high
temperature.
Chemical composition:
C | Si | Mn | Cr | W | V | S | P |
0.30-0.40 | 0.15-0.40 | 0.20-0.40 | 3.00-3.75 | 8.75-10.00 | 0.30-0.50 | ≤0.025 | ≤0.025 |