CuZn39Pb3 Brass

Grade Name

International Designations:

• DIN: CuZn39Pb3 (2.0401)

• China: GB/T 5231 (General specification)

Product Features

• Superior Machinability: Lead particles enhance cutting efficiency.

• Wear Resistance: High hardness (HB 70–140) for friction-intensive applications.

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

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

CuZn39Pb3 Material Specification: Common Forms & Dimensions

Form	Dimensions
Bar	Diameter: Φ6mm–Φ80mm, Length: 1m–6m
Sheet	Thickness: 0.5mm–20mm, Width: ≤1000mm
Tube	OD: Φ6mm–Φ100mm, Wall: 1mm–20mm
Wire	Diameter: Φ0.1mm–Φ6mm, Coiled

CuZn39Pb3 Chemical Composition (% wt.)

Element	Cu	Zn	Pb	Fe (≤)	Others (≤)
Content	57–60	Bal.	2.5–3.5	0.35	0.5

CuZn39Pb3 Material Properties

CuZn39Pb3 Physical Properties

Property	Value
Density	8.4–8.5 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)

CuZn39Pb3 Mechanical Properties (By Condition)

Condition	Tensile Strength (MPa)	Yield Strength (MPa)	Elongation (%)	Hardness (HB)
Soft	≥340	≤190	≥25	70–90
Half-hard	≥410	≥230	≥10	100–120
Hard	≥500	≥350	≥5	120–140

Key Advantages

• Cost Efficiency: Reduced tool wear in CNC machining.

• Regulatory Compliance: Meets RoHS exemptions for industrial use.

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

Applications

• Machinery: Bearings, gears, screws, nuts.

• Electronics: Terminals, sockets, connector pins.

• Construction: Door handles, hinges, locks.

• Automotive: Valve bodies, bearing cages.

Processing Guidelines

• Hot Working: Permitted but avoid prolonged heating.

• 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, pen tips, optical devices.

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

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

FAQ of Material CuZn39Pb3

Q1: Is CuZn 39 Pb3 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 17672-1-1983 (Germany).

• China: GB/T 5231 (General specification).