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Ningbo Jintian Copper (Group) Co., Ltd.
Ningbo Jintian Copper (Group) Co., Ltd.
Code
Brass

CuZn39Pb2 Brass

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


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

Q1: Is it 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) 


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