P20+Ni Mold Steel (1.2738)
Nickel addition over standard P20 improves hardenability through thickness, used for large plastic molds needing uniform hardness in the core.
Chemical Composition
| Element | Percentage (% by weight) |
|---|---|
| C | 0.28 - 0.4 |
| Mn | 0.6 - 1 |
| Si | 0.2 - 0.8 |
| Cr | 1.4 - 2 |
| Mo | 0.3 - 0.55 |
| Ni | 0.9 - 1.2 |
Physical Properties
- Density (kg/m³)
- 7800
- Elastic modulus (GPa)
- 205
- Thermal conductivity (W/m·K)
- 29
Mechanical Properties
- Tensile strength (MPa)
- 1080
- Hardness, max after annealing (HB)
- 235
- Hardness, after hardening (HRC)
- 52
Also known as
Direct equivalents
Same material sold under a different naming standard.
Heat Treatment
- Hardening
- 840-870C, oil quench or hot bath/air at 180-220C
- Annealing
- 710-740C for 2-5 hours, cool 10-20C/hr to 600C then air cool
Typical Applications
- Large plastic molds with high core stress
- Die-casting dies
- Hydroforming tools
Buying This Grade in Pakistan
The nickel-modified alternative to standard P20 for larger molds needing uniform through-hardness, relevant to the same Karachi tool and mold shops linked to KTDMC, positioned as the upgrade option when a mold's core section is too thick for standard P20 to harden evenly.
Related reading
- Plastic injection mold steel in Pakistan: P20, P20-Ni, and 2083 compared
A grade comparison for Pakistani mold makers choosing between P20, P20-Ni, and 2083 for plastic injection and die-casting tooling.
- P20 vs P20-Ni: picking a mold steel for thick-section molds
Standard P20 works for most plastic molds, but large or thick-section molds need P20-Ni's nickel addition for hardness that holds up through the core.
Grade Family
Nickel-modified mold steel
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