Tool steel
P20 Mold Steel
Manufacturer or standards-body identification; product values do not apply to every form or condition.
Identity / state reference
What distinguishes this material
The supplier distinguishes P20 modified and P20 High Hard products. A trade product with added alloying or a different delivery hardness is not every base P20 heat.
- Designation in this reference
- P20 (base grade; modified products separate)
- Forms covered by the sources
- Ellwood mold-steel products; specify exact P20/base or modified product.
- States to distinguish or confirm
- Prehardened delivery requires the supplier hardness specification; no one P20 hardness is assigned.
- Temperature and exposure
- No universal service-temperature limit or room-temperature property set is assigned. Use the cited product document and the purchase certificate.
Property evidence for a stated condition
No condition-specific numerical table is reproduced here
The linked sources establish the identity and the stated product/state scope. Obtain the row for your actual form, section, treatment and test conditions before adopting strength, hardness or a thermal limit.
Resolve these conditions next
- What product standard, edition and complete grade are on the material certificate?
- What product form, section size and delivery/heat-treatment condition will be machined?
For machining, take the exact grade, supplied condition and measured hardness where applicable into the tool maker’s application data. A generic material-family speed is not a substitute for an operation and tool-specific recommendation.
Sources and what they establish
Reviewed 23 October 2026. A source’s publication date and the review date are different. The scope below identifies the fields checked.
Ellwood Walter Metals grade programme
Tool steel names and separate ExELL P20M/P20 High Hard products; not a universal P20 condition.
Ellwood Walter Metals grade programme ↗Source identity, a named product example and a supplied-batch certificate are different evidence. Cross-standard similarity does not approve substitution.
Corrections from the previous article
- Separate generic P20 from P20M/modified and High Hard variants; do not silently substitute Impax Supreme data.
- Withdraw the legacy generic hardness (280–320 HB (prehardened)) and tensile-strength (1,000 MPa (145 ksi)) pair: the old page does not establish a matching product, heat treatment, section and test source.
- Remove the unsupported cutting-speed table and machinability percentage; select tooling only after the actual material condition is known.
Other references in Tool steel
Related references, not equivalent substitutes.