CuZn36Pb3 Brass

Grade Name

International Designations:

• DIN: CuZn36Pb3 (2.0375)

• EN: CW603N

• UNS: C36000

Product Features

• Superior Machinability: Free-cutting due to dispersed lead particles.

• Wear & Friction Resistance: Ideal for sliding components.

• Corrosion Resistance: Suitable for general environments; coatings required for marine use.

• Cold Workability: Excellent plasticity for stamping and bending.

Common Forms & Dimensions

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

CuZn36Pb3 Chemical Composition (% wt.)

Element	Cu	Zn	Pb	Fe (≤)	Sn (≤)	Ni (≤)	Others (≤)
Content	60–62	Bal.	2.5–3.5	0.35	0.2	0.3	0.2
Note: Al ≤0.05%, data from DIN 17660 and supplier tests.

Physical Properties

Property	Value
Density	8.5 g/cm³
Melting Point	900–1000°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 (F34)	≥340	≤250	≥35	≈85
Half-hard (F40)	≥400	≥250	≥18	≈115
Hard (F46)	≥460	≥350	≥12	≈140
Data from DIN 17672-1 and supplier tests.

Key Advantages

• Cost Efficiency: High-speed machining reduces production time.

• Durability: Balances strength (≥340 MPa) and ductility (≥35% elongation).

• Regulatory Compliance: Meets RoHS exemptions for specific applications.

Applications

• Machinery: Gears, valve stems, bushings.

• Electronics: Connectors, terminals, camera parts.

• Construction: Locks, hinges, decorative hardware.

• Automotive: Fuel system components, brake parts.

Processing Guidelines

• Hot Working: Prohibited (lead vaporization risk).

• Cold Working: Annealing required to prevent cracking.

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

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

Key Application Scenarios

• Precision Engineering: Watch components, optical devices.

• Wear-Resistant Parts: Bushings, bearings, fasteners.

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

FAQ

Q1: Is it safe for potable water systems?

A: Contains lead; use only if compliant with local regulations (e.g., NSF/ANSI 61).

Q2: Lead-free alternatives?

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

Q3: Long-term exposure to humidity?

A: Requires protective coatings and regular inspections.

Standards Reference

International:

• DIN 17672-1

• EN 12164 (CW603N)

• ASTM B453 (C36000)

China: GB/T 5231 (General specification)