Tool Steel Grade JIS SKT4
Equivalent: ASTM L6, DIN 1.2714, EN 55NiCrMoV7
Technique: Forged
Alloy Or Not Is Alloy
Special Use: Mold Steel
annealing: 500°C air cooling or furnace cooling HB: 197-241
Quenching: 830-860°C oil cooling HRC : 53-58
Backfire: 490-510°C HRC : 41-47 ( small-sized forging die)
520-540°C HRC : 38-41 ( medium-sized forging die)
560-580°C HRC : 34-37 ( large-sized forging die)
620-640°C HRC : 34-37 (medium-sized forging die)
640-660°C HRC : 30-35 (small-sized forging die)
Features
Hot working die steel
Preserving the hardness when hot treatment
Good abrasion resistance
High ductility and abrasion resistance
Good hardness and hardenability
Insensitivity to temper brittleness because of the molybdenum in steel
Availability
Round Bar: Φ 12-410mm
Flat: 8-160*205-710mm
Mould: 200*200-1200*1000mm
Length: 3000-12000mm
Chemical Composition C 0.50~0.60
Si 0.10~0.40
S 0.005
P 0.025
Mn 0.60~0.90
Cr 0.80~1.20
V 0.05~0.15
Mo 0.35~0.55
Applications
- Steel SKD 11
- Steel SKD 61
- Steel SKS 3
- Tungsteen Carbide
- HSS
