Metals & alloys · Copper alloys
C260 cartridge brass
A 70/30 copper–zinc brass combining formability, corrosion resistance and attractive surface finish for deep-drawn and general fabricated products.
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01
Overview
- Material class
- Metals & alloys
- Category
- Copper alloys
- Family
- Copper Alloy
- Product forms
- Sheet/plate, Bar/rod
Composition
| Constituent | Min | Max | Typical | Note |
|---|---|---|---|---|
| Cu | 68.5 | 71.5 | 70 | |
| Pb | 0.07 | 0.02 | ||
| Fe | 0.05 | 0.02 | ||
| Zn | Balance |
02
Properties and conditions
Engineering properties
| Property | Value | Unit | Condition |
|---|---|---|---|
| Density | 8.53 | g/cm³ | Representative; verify product form and condition |
| Elastic modulus | 105–115 | GPa | Representative; verify product form and condition |
| Thermal conductivity | ~120 | W/m·K | temper dependent |
| Electrical conductivity | ~28 | % IACS | representative |
| Yield strength | 75–450 | MPa | annealed to hard temper |
| Tensile strength | 300–550 | MPa | temper dependent |
Conditions
Representative supplied condition
Condition not fully specified in the source record.
03
Processing and use
Processing
- Cold work strongly controls strength and ductility.
- Annealing and grain size control earing and deep-draw behaviour.
Applications
- Deep-drawn cases
- Radiator and heat-exchanger parts
- Decorative hardware
- Electrical and mechanical components
Selection considerations
- Susceptible to dezincification and stress-corrosion cracking in some environments.
- For aggressive water service consider inhibited brass or copper-nickel alternatives.
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04
Standards and related materials
Standards and designations
| System | Designation | Note |
|---|---|---|
| UNS | C26000 | |
| ASTM | B36/B19/B135 | sheet/tube/wire forms |
| EN | CW505L / CuZn30 |
05
Sources and context
Sources
- Copper Development Association C26000 alloy designationExisting reference
Confirm the applicable specification, product form and condition before using values for design or procurement.
Supply and sustainability
High-volume sheet, strip and tube alloy with broad global availability.
High scrap value and excellent recyclability; zinc losses and mixed-alloy scrap require melt control.
Strategic context
Established engineering material with documented processing–performance relationships.