P20 Mold Steel
Pre-hardened mold steel, machinable into large and complex dies and molds. Usually used in carburized condition.
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 |
| Cu | max 0.25 |
| P | max 0.03 |
| S | max 0.03 |
Physical Properties
- Density (kg/m³)
- 7850
Mechanical Properties
- Hardness (HB)
- 300
- Hardness (HRC)
- 30
- Tensile strength (MPa)
- 965 to 1030
Also known as
Direct equivalents
Same material sold under a different naming standard.
Heat Treatment
- Tempering
- 482-593C for 37-28 HRC
- Annealing
- 760-788C, furnace cool below 4C/hr
Typical Applications
- Plastic injection molds
- Die-casting dies
- Extrusion dies
Buying This Grade in Pakistan
Pre-hardened mold steel for plastic injection and die-casting tooling, the core material KTDMC in Korangi Creek was established to support as Pakistan's plastics and automotive tooling sectors grew. Sourced as imported bar and block since it isn't rolled locally.
Related reading
- Steel grades for Karachi's tool and die shops: D2, H13, K100, P20 compared
A buyer's guide to the four main tool and mold steel grades Karachi's die shops order, and how to tell which one a job actually needs.
- 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
Low-carbon mold steel (Group P)
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