CuZn39Pb2 Brass

Grade Name

International Designations:

• DIN: CuZn39Pb2 (2.0375)

• EN: CW603N

• UNS: C36000

Product Features

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

• Mechanical Excellence: Tensile strength up to 440 MPa, elongation ≥10%.

• Corrosion Resistance: Suitable for marine and industrial environments (with coatings).

• Multi-Process Compatibility: Cold rolling, extrusion, and forging supported (hot working prohibited).

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

CuZn36Pb2 Brass Chemical Composition (% wt.)

Element	Cu	Zn	Pb	Fe (≤)	Sn (≤)	Ni (≤)	Others (≤)
Content	58.5–60.0	Bal.	1.5–2.8	0.4	0.2	0.3	1.0
Note: Al ≤0.05%, Mn ≤0.1%, data from DIN 17660 and supplier tests .

Physical Properties

Property	Value
Density	8.4–8.5 g/cm³
Melting Point	900–930°C
Electrical Conductivity	28% IACS (20°C)
Thermal Conductivity	109–115 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)	≥340–440	≤190–300	≥15–28	70–100
Half-hard (H100)	≥410	≥230	≥8–12	100–145
Hard (H120)	≥500	≥350	≥3–8	≥120
Data from DIN 17672-1 and supplier tests .

Key Advantages

• Cost Efficiency: Reduces tool wear in high-speed CNC machining.

• Regulatory Compliance: Meets RoHS exemptions for industrial use.

• Durability: Stable performance in harsh environments.

Applications

• Machinery: Gears, valve stems, bushings.

• Electronics: Connectors, terminals, optical devices.

• Automotive: Radiators, brake components.

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

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, camera parts.

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

• Marine Systems: Seawater valves, pipelines (with maintenance).

FAQ of CuZn36Pb2 Material

Q1: Is material CuZn36Pb2 safe for potable water systems?

A: Contains lead; comply with local regulations (e.g., NSF/ANSI 61).

Q2: Lead-free alternatives?

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

Q3: Long-term exposure to seawater?

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)