Copper alloys
Copper C11000
UNS C11000 is electrolytic tough-pitch copper (ETP).
Identity / state reference
What distinguishes this material
ETP is not OFE C10100; electrical applications still require specified temper, form and conductivity conditions.
- Designation in this reference
- UNS C11000
- Forms covered by the sources
- Wrought copper product
- States to distinguish or confirm
- Annealed or cold-worked condition must be identified
- Temperature and exposure
- No general service-temperature limit or temperature-independent strength is established by this page. Check the temperature and duration for the specific source table and application.
Other search names in these sources
C11000
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
- Is the intended requirement ETP or oxygen-free copper, and what form/temper is supplied?
- Obtain the full material certificate, governing specification/edition, product dimensions and test direction before adopting a property value.
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.
Copper Development Association — C11000
Specific alloy database entry; identity and listed form/temper distinctions. Direct fetch intermittently returns 403; indexed first-party text inspected on review date. No supplied-batch certification.
Copper Development Association — C11000 ↗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 universal 220 MPa/45 HRB pair and broad 'highest conductivity' ranking.
- Remove the untraceable generic machining recommendation (20 %) and cutting-speed ranges; select machining data by actual material condition, tool and operation.
Distinguish copper and copper-alloy identities
Use the full UNS designation to separate these materials. Conductivity, machining and corrosion properties need evidence for the exact grade and condition.