CuZn40 Brass

Grade Name

International Designations:

• DIN: CuZn40 (2.0360)

• EN: CW617N

• UNS: C38010

• China: GB/T 5231

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.

• Thermal & Electrical Conductivity: 28% IACS, 115 W/(m·K).

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

CuZn40 Chemical Composition (% wt.)

Element	Cu	Zn	Pb (≤)	Fe (≤)	Sn (≤)	Mn (≤)	Others (≤)
Content	57–61.5	Bal.	0.2–3.5	0.35	0.2	0.1	0.5

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 (R360)	≥370	≥250	≥15	≤100
Half-hard (H100)	≥410	≥230	≥8	100–145
Hard (H120)	≥500	≥350	≥5	≥120

Key Advantages

• Cost Efficiency: Reduces tool wear in CNC machining.

• Regulatory Compliance: Meets RoHS exemptions for industrial use.

• Durability: Stable performance in harsh environments.

Applications

• Machinery: Gears, bearings, valve bodies.

• Electronics: Connectors, terminals, conductive parts.

• Automotive: Brake components, radiators.

• Construction: Pipe fittings, decorative hardware.

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 Engineering: Watch components, optical devices.

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

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

FAQ

Q1: Is it eco-friendly?

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

Q2: Alternatives for lead-free use?

A: Use CW614N (lead-free brass) with lower machinability.

Q3: How to improve seawater resistance?

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

Standards Reference

• International: DIN 17660-1983, EN 12163 (CW617N), ASTM B505 (C38010).

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