4Cr5MoSiV material is a hot work mold steel under GB/T 1299-2014 standard. The containing molybdenum element makes it have excellent toughness and high hardenability, which are frequently used in hot work applications requiring toughness are relatively high hardness levels.
Standard: GB/T 1299-2014
Category: alloy mold steel
4Cr5MoSiV Mold Steel Chemical Requirement(%)
| C |
Mn |
Si |
Cr |
V |
Mo |
| 0.33～0.43 |
0.20～0.50 |
0.80～1.20 |
4.75～5.50 |
0.30～0.60 |
1.10～1.60 |
4Cr5MoSiV mold steel hardness in annealing condition: ≤229 HBW
4Cr5MoSiV Mold Steel Heat Treatment
Preheated to 816°C(1500°F). Then the steels are directly heated by increasing the temperature to 1010°C(1850°F) followed by holding for 15 to 40 minutes, then air-quenched. Annealed at 871°C (1600°F) and slowly cooled at 4°C (40°F in the furnace. Tempering at temperature ranging from 538 to 649°C (1000 to 1200°F) to obtain hardness of 38 to 54 HRC.
