Stainless steel
2205 Duplex
Manufacturer or standards-body identification; product values do not apply to every form or condition.
Identity / state reference
What distinguishes this material
2205 describes a duplex grade family. The purchase must identify the certified UNS designation and solution-treated condition; a common name alone does not prove both S31803 and S32205 compliance.
- Designation in this reference
- 2205 duplex stainless steel
- Forms covered by the sources
- Cliffs duplex flat products.
- States to distinguish or confirm
- Confirm solution treatment and the certificate-specific UNS identity.
- 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 2205-duplex product data
Manufacturer flat-product datasheet; condition and dimensions are product-specific, not all bar, forging or casting supply.
Cleveland-Cliffs 2205-duplex 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
- Remove the unsupported “twice as hard on tooling” rule. Do not transcribe the apparent carbon decimal typo in the supplier PDF; this review makes no chemistry table from that field.
- Withdraw the legacy generic hardness (290 HB (max)) and tensile-strength (620 MPa (90 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.
Understand the duplex designation
Use the definition alongside the specific 2205 identity and condition record.