service@jtgroup.com.cn
+86-057483005999
+86-18057437999
en
en
Ningbo Jintian Copper (Group) Co., Ltd.
Ningbo Jintian Copper (Group) Co., Ltd.
Code
Copper

CuNi18Zn27 Copper

Copper

Designation

  • Name: High-Nickel Zinc Cupronickel CuNi18Zn27

  • International Designation: CW410J (European Standard), DIN 2.0540, C77000

  • Standards: DIN 17665, EN 12164, ISO 1635.


Key Features

1. Superior Corrosion Resistance: Excellent resistance to seawater, salt spray, and strong acids.

2. High Strength & Ductility: Balanced tensile strength (up to 600MPa) and cold-forming capability.

3. Anti-Biofouling: Smooth surface minimizes marine organism adhesion.

4. Conductivity: Ideal for precision electronics and thermal management.

5. Aesthetic Value: Silver-white luster for luxury applications.


Common Forms & Dimensions

Form

Dimensions

Round Bar

Diameter: Φ5.0mm–350mm

Plate

Thickness: 0.5–150mm

Tube

Seamless tubes per EN 12449 (Wall ≤20mm)

Wire

Diameter: 0.2mm–6.0mm

Forged Parts

Custom shapes (e.g., marine fittings, valves)

Note: Confirm feasibility for non-standard sizes.


Chemical Composition (wt%)

Element

Cu

Ni

Zn

Pb

Fe

Mn

Impurities

Range

53–58

17–19

25–28

≤0.3

≤0.5

≤0.5

≤0.5

Data based on DIN 17665.


Physical Properties

Property

Value/Description

Density

8.9 g/cm³

Thermal Conductivity

25 W/m·K (at 20°C)

Electrical Resistivity

0.35 μΩ·m (at 20°C)

Conductivity

~12% IACS

Magnetism

Slightly magnetic (Ni influence)


Mechanical Properties

Property

Range/Typical Value

Tensile Strength (Rm)

450–650 MPa (varies by temper)

Yield Strength (Rp0.2)

200–400 MPa

Elongation (A)

15–35%

Brinell Hardness (HB)

120–200

Note: Hard temper (H) offers higher tensile strength.


Core Advantages

  • Extreme Environment Adaptability: Suitable for deep-sea and harsh chemical environments.

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

  • Low Maintenance: Anti-fouling and wear-resistant properties extend service life.


Applications

  • Marine Engineering: Deep-sea valves, condensers, pump components.

  • Energy & Chemical: Acid-resistant pipelines, refinery heat exchangers.

  • Electronics: High-precision connectors, resistor substrates.

  • Luxury Goods: Watch cases, jewelry accessories.


Processing Guidelines

1. Cold Working: Limit deformation to ≤30% per pass; anneal at 700–800°C.

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

3. Machining: Carbide tools with low speed and lubricants.

4. Surface Treatment: Electro-polishing or rhodium plating for enhanced finish.


Key Application Scenarios

  • Deep-Sea Equipment: High-pressure corrosion-resistant valves.

  • Nuclear Power Plants: Chloride-resistant heat transfer tubes.

  • Luxury Watchmaking: Sweat-resistant watch bands.


FAQs

Q1: How does CuNi18Zn27 differ from CuNi12Zn24?

A: CuNi18Zn27 has higher Ni content (17–19%) for enhanced corrosion resistance and strength.


Q2: Suitable for high-temperature/pressure environments?

A: Long-term use ≤180°C; short-term tolerance up to 250°C (pressure-dependent).


Q3: How to prevent cracking during processing?

A: Control cold deformation rate and anneal promptly.


Standards Reference

  • DIN 17665: Chemical and mechanical specifications.

  • EN 12164: Plate and strip processing standards.

  • ISO 1635: Corrosion resistance testing.


Start Your Partnership With JINTIAN COPPER!
Whether you have any questions about our products, please feel free to contact us, we will reply as soon as possible.
Related JINTIAN DIN
News from Ningbo Jintian Copper (Group) Co., Ltd
How Hard Is a Front Flip for Humanoid Robots?
11
Apr 2025
How Hard Is a Front Flip for Humanoid Robots? Learn More
Hollow Cup Precision Breakthrough Pending: Frameless Torque Industrialization Accelerates
Tue 04 2025
Hollow Cup Precision Breakthrough Pending: Frameless Torque Industrialization Accelerates Learn More
How Copper Tubing Enhance Energy Efficiency in HVAC Systems with Innovative Technology?
Sat 04 2025
How Copper Tubing Enhance Energy Efficiency in HVAC Systems with Innovative Technology? Learn More