CuZn40Pb2 Brass

Grade Name

International Designations:

• DIN: CuZn40Pb2 (CW617N)

• China: GB/T 5231 (General specification)

• UNS: C38010

Product Features

• Superior Machinability: Lead particles enhance cutting efficiency.

• Mechanical Excellence: Tensile strength ≥370 MPa, yield strength ≥250 MPa.

• Corrosion Resistance: Stable in humid environments; coatings required for marine use.

• Forming Flexibility: Supports cold/hot forming and achieves high strength after cold working.

Common Forms & Dimensions

Form	Dimensions
Bar	Diameter: Φ5mm–Φ150mm, Length: 1m–6m
Sheet	Thickness: 0.5mm–50mm, Width: ≤1000mm
Tube	OD: Φ10mm–Φ200mm, Wall: 1mm–20mm
Wire	Diameter: Φ0.5mm–Φ10mm, Coiled

CuZn40Pb2 Chemical Composition (% wt.)

Element	Cu	Zn	Pb	Fe (≤)	Sn (≤)	Others (≤)
Content	57–60	Bal.	1.5–3.5	0.35	0.3	1.0

Physical Properties

Property	Value
Density	8.4 g/cm³
Melting Point	900–930°C
Electrical Conductivity	28% IACS (20°C)
Thermal Conductivity	115 W/(m·K) (20°C)
Thermal Expansion	20.2×10⁻⁶/K (20–300°C)

Mechanical Properties (By Condition)

Condition	Tensile Strength (MPa)	Yield Strength (MPa)	Elongation (%)	Hardness (HB)
Soft	≥370	≥250	≥8	≤100
Hard	≥500	≥350	≥5	120–140

Key Advantages

• Cost Efficiency: Reduces tool wear in CNC machining.

• Regulatory Compliance: Meets RoHS exemptions for industrial use.

• Durability: Balances strength (≥500 MPa) and ductility (≥5% elongation).

Applications

• Machinery: Gears, bearings, valve bodies.

• Electronics: Connectors, terminals, precision instruments.

• Automotive: Brake components, radiators.

• Construction: Pipe fittings, valve accessories.

Processing Guidelines

• Hot Working: Avoid prolonged heating to prevent lead vaporization.

• Cold Working: Annealing required after cold forming.

• Welding: Not recommended; use protective gas if necessary.

• Surface Treatment: Ni/Cr plating advised for marine environments.

Key Application Scenarios

• Precision Components: Watch parts, optical devices.

• Wear-Resistant Parts: Bushings, shafts, lock cylinders.

• Marine Systems: Corrosion-resistant fittings (with coatings).

FAQ of CuZn40Pb2 Material

Q1: Is material CuZn40Pb2 eco-friendly?

A: Contains lead; complies with RoHS exemptions for industrial use.

Q2: Can it be used in potable water systems?

A: Not recommended; choose lead-free alternatives.

Q3: How to improve seawater resistance?

A: Apply Ni/Cr coatings and conduct regular maintenance.

Standards Reference

• International: DIN EN 12166-1998 (CW617N), ASTM B505.

• China: GB/T 5231 (General specification)