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260 Brass Product Guide
Applications | Specifications | Mechanical and Chemical Data | Tolerances
260 Brass
Overview
260 Brass (Cartridge Brass) is the most ductile of the yellow brasses. It offers excellent cold forming, good strength, and corrosion resistance. It is softer than machining brasses and is not ideal for heavy cutting operations but is easily deep drawn. Avoid exposure to ammonia or strong acids. Common uses include architectural trim, electrical connectors, fasteners, and ammunition casings.
Common Trade Names
- UNS C26000
- CDA 260
- Cartridge Brass 70/30
- CuZn30 / CZ106
Products
Sheet/Plate, Round Tube, Shim Stock, Foil, Decorative Fittings
Applications
- Ammunition Casings
- Fasteners
- Electrical Components
- Architectural Trim
Specifications
| Standard | Description |
|---|---|
| ASTM B36 | Brass Plate, Sheet & Strip |
Mechanical Properties (Typical)
| Property | Soft Annealed | Annealed | H01 | H02 |
|---|---|---|---|---|
| Density | 0.308 lb/in³ | |||
| Ultimate Tensile Strength | 49.3 ksi | 50.1 ksi | 53.7 ksi | 61.6 ksi |
| Yield Strength | 16.7 ksi | 17.8 ksi | 36 ksi | 52.2 ksi |
| Elongation | 57% | 55–57% | 43% | 23% |
| Electrical Conductivity | ~28% IACS | |||
Chemical Composition (Typical)
| Element | % |
|---|---|
| Copper (Cu) | ~70% |
| Zinc (Zn) | ~30% |
272 Brass Product Guide
Applications | Specifications | Mechanical and Chemical Data | Tolerances
Overview
272 Brass (Yellow Brass) contains more zinc than C260, giving it higher strength while still maintaining good formability. Common in plumbing hardware, lighting fittings, and architectural elements.
Common Trade Names
- UNS C27200
- Yellow Brass
- CZ108 / CuZn37
Specifications
| Standard | Description |
|---|---|
| ASTM B135 | Seamless Brass Tube |
Mechanical Properties (Typical)
| Property | Annealed | Half-Hard (H02) |
|---|---|---|
| Tensile Strength | ~55 ksi | ~70 ksi |
| Yield Strength | ~20 ksi | ~60 ksi |
| Elongation | ~50% | ~20% |
Chemical Composition
| Element | % |
|---|---|
| Copper (Cu) | ~63% |
| Zinc (Zn) | ~37% |
330 Brass Product Guide
Applications | Specifications | Mechanical and Chemical Data | Tolerances
Overview
330 Brass is engineered for machinability and tube-forming performance. It is widely used in HVAC, refrigeration, heat exchangers, and flared/formed tubing systems.
Specifications
| Standard | Description |
|---|---|
| ASTM B135 | Seamless Brass Tube |
| ASTM B75 | Heat Exchanger / Condenser Tube |
Mechanical Properties (Typical)
| Property | Annealed | Light Drawn |
|---|---|---|
| Tensile Strength | ~50 ksi | ~65 ksi |
| Yield Strength | ~18 ksi | ~45 ksi |
| Elongation | ~45% | ~20% |
Chemical Composition
| Element | % |
|---|---|
| Copper (Cu) | ~65% |
| Zinc (Zn) | ~35% |
| Lead (Pb) | ≤ 0.05% |
How to Choose
- C260: Best formability (deep drawing, bending, architectural shapes)
- C272: Balanced strength + formability (general hardware, plumbing)
- C330: Best machinability + flare-forming (HVAC, refrigeration, instrumentation tubing)
Tolerances depend on ASTM product form (e.g., B135 tube). Typical tube wall tolerance is ±10% unless otherwise specified.
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