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

CuNi12Zn24 Copper

Copper

Designation

  • Name: Nickel-Zinc Cupronickel CuNi12Zn24

  • International Designation: CW409J (European Standard), DIN 2.0520, C75700

  • Standards: DIN 17664, EN 12163, ISO 1187.


Key Features

1. Corrosion Resistance: Excellent in seawater, chloride, and acidic environments.

2. High Strength & Ductility: Balanced mechanical properties for cold forming.

3. Anti-Biofouling: Smooth surface resists marine organism attachment.

4. Conductivity: Suitable for precision electronics and thermal components.

5. Aesthetic Appeal: Silver-white finish for decorative applications.


Common Forms & Dimensions

Form

Dimensions

Round Bar

Diameter: Φ5.0mm–300mm

Plate

Thickness: 0.5–150mm

Tube

Seamless tubes per EN 12449 (Wall ≤15mm)

Wire

Diameter: 0.2mm–5.0mm

Forged Parts

Custom shapes (e.g., flanges, valve parts)

Note: Confirm feasibility for non-standard sizes.



Chemical Composition (wt%)

Element

Cu

Ni

Zn

Pb

Fe

Mn

Impurities

Range

60–65

11–13

23–25

≤0.5

≤0.3

≤0.5

≤0.5

Data based on DIN 17664.









Physical Properties

Property

Value/Description

Density

8.8 g/cm³

Thermal Conductivity

29 W/m·K (at 20°C)

Electrical Resistivity

0.28 μΩ·m (at 20°C)

Conductivity

~15% IACS

Magnetism

Slightly magnetic (due to Ni)


Mechanical Properties

Property

Range/Typical Value

Tensile Strength (Rm)

380–520 MPa (varies by temper)

Yield Strength (Rp0.2)

160–300 MPa

Elongation (A)

20–40%

Brinell Hardness (HB)

100–160

Note: Significant differences between soft (O) and hard (H) tempers.


Core Advantages

  • All-Round Corrosion Resistance: Adaptable to harsh environments.

  • Processing Flexibility: Compatible with cold rolling, stamping, and welding.

  • Long Service Life: Low maintenance with anti-fouling properties.


Applications

  • Marine Engineering: Desalination pipes, ship valves, condenser tubes.

  • Chemical Industry: Heat exchangers, reactor linings, acid transfer pipes.

  • Electronics: Precision connectors, resistor substrates.

  • Decoration: High-end cutlery, architectural trim.


Processing Guidelines

1. Cold Working: Anneal at 650–750°C to relieve stress.

2. Welding: Use TIG welding; post-weld acid cleaning required.

3. Machining: Low-speed cutting with lubricants.

4. Surface Treatment: Polishing/coating for enhanced durability.


Key Application Scenarios

  • Desalination Plants: Corrosion-resistant piping.

  • Petrochemical Refineries: Acid-resistant components.

  • Luxury Appliances: Functional and decorative metal parts.


FAQs

Q1: How does CuNi12Zn24 differ from B10 cupronickel?

A: B10 has 10% Ni and lower corrosion resistance; CuNi12Zn24 offers optimized Ni-Zn balance.


Q2: Suitable for high-temperature steam?

A: Recommended ≤150°C for long-term use; short-term tolerance up to 200°C.


Q3: How to avoid cracking during processing?

A: Control cold deformation rate and anneal promptly.


Standards Reference

  • DIN 17664: Chemical and mechanical specifications.

  • EN 12163: Rod processing standards.

  • ISO 1187: Corrosion resistance testing.


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