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Formula: Cu 70/Zn 30
Form: Tube
Material: Copper/Zinc (Brass)
Commodity: Alloys
Wall Thickness: 0.41mm
Inside Diameter: 2.74mm
Outside Diameter: 3.56mm
Temper: As Drawn
Brass Tube (Cu70/Zn30) offers high thermal conductivity, good ductility, and strong corrosion resistance, making it well-suited for environments requiring efficient heat transfer and long-term structural performance. Its 70% copper and 30% zinc composition provides an optimal balance between mechanical strength and workability, enabling precise forming for both industrial and decorative applications. Commonly employed in heat exchanger systems, marine fittings, and high-quality architectural elements, this alloy delivers consistent performance in both fresh and saltwater conditions. Specific applications include condenser tubing for power plants, precision components in fluid handling systems, and durable framework for decorative installations. Research into Cu70/Zn30 brass tubing often investigates stress corrosion cracking resistance, dezincification mitigation, and manufacturing methods such as flow forming to optimize microstructure and performance. These qualities ensure that the material remains a preferred choice for engineers seeking both reliability and adaptability in critical thermal and mechanical systems.
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Tolerances

Tube
Outside Diameter =<2mm ±0.05mm
Outside Diameter 2mm - 5mm ±0.1mm
Outside Diameter >5mm ±5%
Wall Thickness ±10%

Material Properties for Alloys

Mechanical Properties
Element Value
Hardness - Brinell 65-160
Elongation at break( % ) 65
Modulus of elasticity( GPa ) 100-115
Izod impact strength( J m⁻¹ ) 50-90
Shear strength( MPa ) 200-400
Tensile strength( MPa ) 300-700
Electrical Properties
Element Value
Electrical resistivity( µOhmcm ) 6.2-7.8
Temperature coefficient( K⁻¹ ) 0.0012-0.0016
Thermal Properties
Element Value
Melting point( C ) 910-965
Thermal conductivity( W m⁻¹ K⁻¹ ) 109-121@23°C
Coefficient of thermal expansion( x10⁻⁶ K⁻¹ ) 19-20@20-100°C
Physical Properties
Element Value
Density( gcm⁻³ ) 8.55

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