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

CuZn36Pb3 Brass

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)


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