Stainless steel
904L Stainless
Manufacturer or standards-body identification; product values do not apply to every form or condition.
Identity / state reference
What distinguishes this material
2RK65 billets are a specific 904L product. The source warns that tube-derived elevated-temperature proof values are only indicative for billets.
- Designation in this reference
- 904L / UNS N08904
- Forms covered by the sources
- Round and round-cornered-square Alleima billets.
- States to distinguish or confirm
- Establish billet condition and the final product’s own solution-treatment specification.
- Temperature and exposure
- No universal service-temperature limit or room-temperature property set is assigned. Use the cited product document and the purchase certificate.
Other search names in these sources
UNS N08904 · 1.4539
Read the scope above: a source’s related product name is not a blanket interchangeability statement.
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.
Alleima 2RK65 billet datasheet
UNS N08904 / 1.4539 billet product; tube-derived high-temperature values are explicitly indicative for billets.
Alleima 2RK65 billet datasheet ↗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 guaranteed billet high-temperature properties inferred from tube tests; acid resistance must retain medium, concentration and temperature.
- Withdraw the legacy generic hardness (70–90 HRB) and tensile-strength (490 MPa (71 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 Stainless steel
Related references, not equivalent substitutes.