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

CuZn40 Brass

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


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).


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