Stainless steel
AISI 430
Manufacturer or standards-body identification; product values do not apply to every form or condition.
Identity / state reference
What distinguishes this material
Standard 430 and Cliffs 430 ULTRA FORM are separately described products; ferritic grade identity does not make their formability or processing history identical.
- Designation in this reference
- Type 430
- Forms covered by the sources
- Cliffs sheet/strip products.
- States to distinguish or confirm
- Record the actual flat-product finish and condition.
- 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.
Cleveland-Cliffs 430-430-ultra-form product data
Manufacturer flat-product datasheet; condition and dimensions are product-specific, not all bar, forging or casting supply.
Cleveland-Cliffs 430-430-ultra-form product data ↗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
- Keep standard 430 separate from the supplier ULTRA FORM variant; remove the universal hardness/tensile pair.
- Withdraw the legacy generic hardness (88 HRB) and tensile-strength (450 MPa (65 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.
Check the full 430-family designation
Read the 430F identity separately instead of dropping the suffix when comparing machining or service requirements.