ASTM B111 C23000 Tube – UNS C23000 (Red Brass Tube)
ASTM B111 C23000 Tube, designated as UNS C23000, is commonly known as Red Brass. It is a high-copper brass alloy containing a small percentage of zinc, providing an excellent balance of corrosion resistance, strength, and formability. ASTM B111 UNS C23000 red brass tubes are manufactured in seamless form and are widely used in condensers, heat exchangers, and industrial piping systems where reliable performance and resistance to general corrosion are required. Due to its high copper content, this alloy exhibits good thermal conductivity and long service life in fresh water and mildly corrosive environments.
Key Features
- High copper content for excellent corrosion resistance
- Good thermal conductivity for efficient heat transfer
- Excellent ductility and ease of fabrication
- Seamless construction ensures uniform quality
- Good resistance to dezincification
- Long service life with minimal maintenance
Equivalent Grades
| Standard | Equivalent Grade |
|---|---|
| UNS | C23000 |
| EN | CuZn15 |
| DIN | 2.0265 |
| ISO | CuZn15 |
Sizes
- Outside Diameter: 6 mm to 114.3 mm
- Wall Thickness: 0.7 mm to 6 mm
- Length: Up to 6 meters, random or cut lengths available
- Form: Straight lengths and U-bend tubes
ASTM B111 C23000 Chemical Composition
| Element | Percentage (%) |
|---|---|
| Copper (Cu) | 84.0 – 86.0 |
| Zinc (Zn) | Balance |
| Lead (Pb) | Max 0.07 |
| Iron (Fe) | Max 0.05 |
| Tin (Sn) | Max 0.05 |
C23000 Mechanical Properties
| Property | Value |
|---|---|
| Tensile Strength | ≥ 300 MPa |
| Yield Strength | ≥ 100 MPa |
| Elongation | ≥ 35% |
| Hardness | ≤ 70 HRB |
UNS C23000 Physical Properties
| Property | Value |
|---|---|
| Density | 8.75 g/cm³ |
| Melting Point | ~1020°C |
| Thermal Conductivity | ~140 W/m·K |
| Electrical Conductivity | ~35% IACS |
Types
- C23000 Seamless Tubes
- C23000 U-Bend Tubes
- Condenser Tubes
- Heat Exchanger Tubes
Applications
ASTM B111 C23000 (UNS C23000) Red Brass tubes are widely used in condensers, heat exchangers, power plants, HVAC systems, plumbing and water supply lines, industrial cooling systems, and general engineering applications. Their excellent corrosion resistance, high thermal conductivity, and ease of fabrication make them a preferred choice for heat transfer and fluid-handling systems operating in fresh water and mildly corrosive environments.





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