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

CuZn39Pb3 Copper

Copper

Grade Name

  • Grade Name: CuZn39Pb3

  • International Standard: EN 12163 CW614N

  • Other Names: 39-3 Leaded Brass, C3771 (Japanese Standard), CZ130 (British Standard)


Product Features

  • Excellent Machinability: High lead content ensures superior machining performance, suitable for high-speed processing.

  • Good Wear Resistance: Ideal for mechanical parts requiring wear resistance.

  • Moderate Strength: Offers good mechanical strength and corrosion resistance.

  • Ease of Processing: Suitable for both hot and cold working, easy to form.

  • Wide Applications: Used in precision parts, valves, fittings, etc.


Common Product Forms and Dimensions

Product Form

Dimensions

Remarks

Rods

Ø5mm - Ø200mm

Round, hexagonal, square rods

Plates

Thickness: 0.5mm - 50mm

Width: 100mm - 600mm

Tubes

Outer Diameter: Ø6mm - Ø150mm

Wall Thickness: 0.5mm - 10mm

Wires

Ø0.1mm - Ø10mm

Coiled or straight

Forgings

Customized as per customer requirements

Suitable for complex parts



Chemical Composition

Element

Content (%)

Remarks

Cu

57.0 - 61.0

Main component

Zn

Balance

Main alloying element

Pb

2.5 - 3.5

Improves machinability

Fe

≤0.3

Impurity

Ni

≤0.5

Impurity

Sn

≤0.3

Impurity

Others

≤0.2

Impurity



Physical Properties

Property

Value

Remarks

Density

8.5 g/cm³

-

Melting Point

885 - 900°C

-

Thermal Conductivity

120 W/(m·K)

20°C

Electrical Conductivity

28% IACS

20°C

Thermal Expansion Coefficient

20.2 × 10⁻⁶ /K

20-300°C

Specific Heat Capacity

0.38 J/(g·K)

20°C



Mechanical Properties

Property

Value

Remarks

Tensile Strength

400 - 550 MPa

-

Yield Strength

150 - 250 MPa

-

Elongation

15 - 25%

-

Hardness

75 - 120 HB

-

Elastic Modulus

100 - 110 GPa

-



Core Advantages

  • Excellent Machinability: The high lead content significantly improves the material's machinability, making it suitable for precision machining.

  • Good Wear Resistance: Ideal for parts operating in high-wear environments.

  • Wide Application Range: Used in valves, fittings, gears, bearings, etc.

  • Ease of Processing: Suitable for both hot and cold working, with excellent formability.



Product Applications

  • Valve Manufacturing: Used in faucets, valve components.

  • Pipe Fittings: Suitable for water and gas pipe connectors.

  • Mechanical Parts: Gears, bearings, bushings, etc.

  • Electronics and Electrical: Terminals, connectors, etc.

  • Decorative Materials: Door handles, decorative pieces, etc.



Processing Notes

  • Machining: Use high-speed steel or carbide tools with moderate cutting speeds.

  • Hot and Cold Working: Be cautious of work hardening during cold working; hot working temperature should be between 600-800°C.

  • Welding: Poor weldability; brazing or soft soldering is recommended.

  • Surface Treatment: Polishing, plating, etc., can enhance appearance and corrosion resistance.



Main Application Scenarios

  • Plumbing Industry: Valves, fittings, connectors, etc.

  • Automotive Industry: Bearings, bushings, gears, etc.

  • Electronics and Electrical: Terminals, connectors, etc.

  • Architectural Decoration: Door handles, decorative pieces, etc.



Frequently Asked Questions (FAQs)

Q1: How is the machinability of CuZn39Pb3?

A1: Due to its high lead content, CuZn39Pb3 has excellent machinability, making it suitable for high-speed machining.


Q2: What is the corrosion resistance of CuZn39Pb3?

A2: It has good corrosion resistance in general environments but requires protection in acidic or alkaline conditions.


Q3: Is CuZn39Pb3 suitable for welding?

A3: It has poor weldability; brazing or soft soldering is recommended.


Q4: What are the main application areas of CuZn39Pb3?

A4: It is widely used in plumbing, automotive, electronics, and architectural decoration industries.



Standard References

  • International Standard: EN 12163 CW614N

  • American Standard: ASTM B16 C3771

  • Japanese Standard: JIS H3250 C3771

  • Chinese Standard: GB/T 5231 HPb59-3


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