Tool steel
H13 Tool Steel
Manufacturer or standards-body identification; product values do not apply to every form or condition.
Identity / state reference
What distinguishes this material
W302 ISOBLOC is an ESR H13 example; the grade name alone does not specify that melting route or a final die hardness.
- Designation in this reference
- H13
- Forms covered by the sources
- W302 ISOBLOC long-product programme.
- States to distinguish or confirm
- Specify delivery condition and final hardening/multiple-tempering requirements.
- 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.
BÖHLER W302 ISOBLOC
H13 / 1.2344 ESR product; not every H13 is an ESR product.
BÖHLER W302 ISOBLOC ↗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
- Remove blanket ESR/quality claims and universal hardness independent of actual tool section.
- Withdraw the legacy generic hardness (190–230 HB (annealed)) and tensile-strength (1,590 MPa (230 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.
Compare another hot-work tool steel
Read the H11 identity and heat-treatment scope before comparing hot-work properties with H13.