CuZn31Si1 Copper

Grade Name

CuZn31Si1 (also known as Silicon Brass)

Excellent Corrosion Resistance: Suitable for corrosive environments such as moisture and seawater.
Good Mechanical Properties: Combines high strength with good ductility.
Superior Machinability: Easy to process, ideal for precision parts manufacturing.
Good Wear Resistance: Suitable for high-friction environments.
Thermal and Electrical Conductivity: Moderate, suitable for applications requiring heat dissipation or electrical conductivity.

Product Form	Specification Range	Remarks
Rods	Diameter: 5mm - 200mm	Custom lengths available
Plates	Thickness: 0.5mm - 50mm	Width: 100mm - 1000mm
Tubes	Outer Diameter: 10mm - 150mm	Wall Thickness: 1mm - 10mm
Wires	Diameter: 0.1mm - 10mm	Supplied in coils or straight lengths
Castings	Customized as per customer requirements	Suitable for complex parts

Element	Content (%)	Remarks
Copper (Cu)	62.0 - 64.0	Main component
Zinc (Zn)	30.0 - 32.0	Main alloying element
Silicon (Si)	0.5 - 1.5	Enhances strength and wear resistance
Lead (Pb)	≤ 0.05	Impurity control
Iron (Fe)	≤ 0.3	Impurity control
Others	≤ 0.5	Total impurities

Property	Value Range	Remarks
Density (g/cm³)	8.2 - 8.5	Moderate
Melting Point (°C)	890 - 900	Suitable for high-temperature environments
Thermal Conductivity (W/m·K)	120 - 130	Good thermal conductivity
Electrical Conductivity (% IACS)	25 - 30	Moderate
Thermal Expansion Coefficient (10⁻⁶/K)	20 - 22	Suitable for environments with temperature variations

Property	Value Range	Remarks
Tensile Strength (MPa)	400 - 500	High strength
Yield Strength (MPa)	200 - 250	Good ductility
Elongation (%)	15 - 25	Suitable for forming
Hardness (HB)	120 - 150	Good wear resistance
Impact Toughness (J/cm²)	50 - 70	Suitable for dynamic load environments

Strong Corrosion Resistance: Suitable for corrosive environments like seawater and chemical industries.
Excellent Machinability: Easy to cut, stamp, and cast.
Balanced Comprehensive Performance: Combines strength, wear resistance, and corrosion resistance.
Environmental Friendliness: Low lead content, complies with environmental standards.

Shipbuilding Industry: Used in marine valves, pump bodies, propellers, etc.
Chemical Equipment: Suitable for corrosion-resistant pipes, valves, and pump bodies.
Automotive Industry: Used in bearings, bushings, connectors, etc.
Electronics and Electrical: Suitable for heat sinks, conductive components, etc.
Architectural Decoration: Used in high-end door and window fittings, decorative parts, etc.

Machining: Use high-speed steel or carbide tools with cooling lubrication.
Welding Performance: Argon arc welding or brazing is recommended; avoid overheating to prevent performance degradation.
Surface Treatment: Polishing, electroplating, or coating can enhance corrosion resistance.
Storage Environment: Avoid contact with acidic or alkaline substances; keep dry and ventilated.

A1: CuZn31Si1 has excellent corrosion resistance, especially suitable for seawater and chemical corrosive environments.

A2: CuZn31Si1 has a high melting point (890-900°C) and can be used in high-temperature environments, but prolonged exposure may degrade performance.

A3: This material has good machinability and ductility, making it easy to process and suitable for various forming techniques.

A4: The material has low lead content, complies with environmental standards, and is suitable for industries with high environmental requirements.

International Standard: ISO 426-1 (Chemical composition and properties of copper-zinc alloys).
Chinese Standard: GB/T 5231 (Chemical composition and product forms of wrought copper and copper alloys).
American Standard: ASTM B36 (Standard specification for brass plate, sheet, strip, and rolled bar).

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