CuZn31Si1 Copper

Grade Name

CuZn31Si1 (also known as Silicon Brass)

Product Features

• 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.

Common Product Forms and Specifications

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

Chemical Composition

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

Physical Properties

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

Mechanical Properties

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

Core Advantages

• 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.

Product Applications

• 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.

Processing Precautions

• 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.

Main Application Scenarios

• Marine Engineering: Seawater desalination equipment, ship components.

• Chemical Industry: Corrosion-resistant pipes, valves, pump bodies.

• Automotive Manufacturing: Wear-resistant bearings, bushings, connectors.

• Electronics and Electrical: Heat sinks, conductive components.

• Architectural Decoration: High-end door and window fittings, decorative parts.

Frequently Asked Questions

Q1: How is the corrosion resistance of CuZn31Si1?

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

Q2: Is this material suitable for high-temperature environments?

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

Q3: How difficult is it to process CuZn31Si1?

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

Q4: How environmentally friendly is CuZn31Si1?

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

Standard References

• 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).