DIN 1785 CuZn20Al2 Aluminum Brass Copper Tube | Aluminum Brass Seamless Tube Supplier
DIN 1785 CuZn20Al2 Aluminum Brass Copper Tube is a high-performance copper alloy tube widely used in marine, condenser, and heat exchanger applications. This aluminum brass alloy offers excellent resistance to seawater corrosion, dezincification, and erosion-corrosion, making it ideal for demanding industrial environments.
CuZn20Al2 aluminum brass is especially suitable for heat transfer systems exposed to brackish water, seawater, and industrial cooling systems.
Material Designation
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DIN Standard: DIN 1785
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Material Grade: CuZn20Al2
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Alloy Type: Aluminum Brass
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Material Number (DIN): CW702R (Equivalent designation may vary by revision)
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UNS Equivalent: C68700 (commonly referenced equivalent)
Chemical Composition of CuZn20Al2
| Element | Composition (%) |
|---|---|
| Copper (Cu) | 76.0 – 79.0 |
| Zinc (Zn) | Balance |
| Aluminum (Al) | 1.8 – 2.5 |
| Arsenic (As) | 0.02 – 0.06 |
| Iron (Fe) | ≤ 0.06 |
| Manganese (Mn) | ≤ 0.05 |
| Nickel (Ni) | ≤ 0.5 |
The addition of aluminum significantly improves corrosion resistance and strength, while arsenic enhances resistance to dezincification.
Mechanical Properties
| Property | Typical Value |
|---|---|
| Tensile Strength | ≥ 330 MPa |
| Yield Strength | ≥ 130 MPa |
| Elongation | ≥ 30% |
| Hardness | ≤ 100 HB |
Mechanical properties may vary depending on temper (soft, half-hard, hard).
Product Specifications
Type:
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Seamless Aluminum Brass Tube
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Heat Exchanger Tube
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Condenser Tube
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Straight Length Tubes
Size Range:
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Outer Diameter (OD): 6 mm – 120 mm
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Wall Thickness: 0.5 mm – 5 mm
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Length: Up to 12 meters
Custom dimensions available upon request.
Applicable Standards
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DIN 1785 – Seamless Copper and Copper Alloy Tubes
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EN 12449 (Updated European Standard for Copper Tubes)
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ASTM B111 (Equivalent US standard for Aluminum Brass Tubes)
