– Pre Hardened –
V’1.2312
Prehardened (30-33 HRc) plastic mold steel known as P20+S with very good machinability due to the sulphur content.
Chemical Composition
| NO | DIN | AISI | C | Si | Mn | P | S | Cr | Mo |
|---|---|---|---|---|---|---|---|---|---|
| V’1.2312 | 40CrMnMoS8-6 | P20+S | 0.35-0.45 | 0.20-0.50 | 1.30-1.60 | Max 0,025 | 0,10-0,50 | 1.80-2.10 | 0.15-0.25 |
Material Properties
- Very good machinability even if it is prehardened.
- Perfect for gun drilling and rapid drilling
- Perfect for fast milling
- Great hardness homogeneity along the cross-section area up to 300 mm thickness.
- Not suitable for mirror polishing, texturing
- Weak weldability
- The recommended working hardness is the delivery hardness.
- Good nitriding ability.
Applications
- All kind frames and holders for molds and dies
- Plastic injection mould cores and cavities (not cosmetic parts)
- Plastic injection mould cores (not cosmetic sides)
- Die casting die holders
- Machinery equipment.
- Wearing Plates.
Heat Treatment
| HEAT TREATMENT | TEMPERATURE |
|---|---|
| Soft Annealing | 700-750°C |
| Stress Relieving | 550-650°C |
| Hardening | 830-870°C |
| Tempering | 600-680°C |
Physical Properties
| 20°C | 100°C | 200°C | 300°C | |
|---|---|---|---|---|
| Elastic Modulus [kN/mm²] | 210 | - | 195 | - |
| Thermal Expansion Coefficient [10ˉ6/K] | - | 12,1 | 12,7 | 13,2 |
| Thermal Conductivity [W/mK] | 34,0 | 35.0 | 35.6 | 36,4 |
| Toughness | 20 | - | - | - |
| Strength [N/mm²] | 850 | - | - | - |
Delivery Condition
Prehardened, 280-320 HB.
Tempering Graph
