Metals & alloys · Copper alloys
CuCrZr / C18150 copper alloy
A precipitation-strengthened copper alloy used where high electrical and thermal conductivity must be retained with improved strength and softening resistance.
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01
Overview
- Material class
- Metals & alloys
- Category
- Copper alloys
- Family
- Copper Alloy
- Product forms
- Sheet/plate, Bar/rod, Powder/feedstock
Composition
| Constituent | Min | Max | Typical | Note |
|---|---|---|---|---|
| Cr | 0.5 | 1.2 | 0.8 | |
| Zr | 0.03 | 0.3 | 0.1 | |
| Cu | Balance |
02
Properties and conditions
Engineering properties
| Property | Value | Unit | Condition |
|---|---|---|---|
| Density | 8.89 | g/cm³ | Representative; verify product form and condition |
| Elastic modulus | 120–130 | GPa | Representative; verify product form and condition |
| Thermal conductivity | 300–340 | W/m·K | aged condition |
| Electrical conductivity | 75–85 | % IACS | aged condition |
| Yield strength | 300–500 | MPa | condition dependent |
| Softening resistance | higher than pure Cu | condition dependent |
Conditions
Overaged
Reduced-strength condition with altered conductivity and precipitate state.
Peak aged
High-strength/high-conductivity precipitation-aged condition.
Solution treated
Supersaturated precursor condition.
03
Processing and use
Processing
- Solution treatment, quench, cold work and aging establish the conductivity–strength balance.
- Overheating or welding can locally overage and soften the alloy.
Applications
- Resistance-welding electrodes
- High-heat-flux components
- Electrical contacts
- Mould and tooling inserts
Selection considerations
- Specify conductivity and hardness together; chemistry alone does not define condition.
- Joining route must preserve the precipitation-hardened state.
Open in an analysis tool
04
Standards and related materials
Standards and designations
| System | Designation | Note |
|---|---|---|
| UNS | C18150 | |
| EN | CW106C / CuCr1Zr | |
| ASTM | B224/B601 | product and temper designation support |
Other names
- CuCrZr
05
Sources and context
Sources
- Copper Development Association C18150 alloy designationExisting reference
Confirm the applicable specification, product form and condition before using values for design or procurement.
Supply and sustainability
Available as bar, plate, forgings and specialized high-conductivity products.
High copper value supports recycling; service-life extension in electrodes and thermal components can reduce replacement frequency.
Strategic context
Established engineering material with documented processing–performance relationships.