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JTCOPPER
JTCOPPER
Code
Copper

C75700 Copper

UNS Standard
Copper

Grade Name

C75700 Nickel Silver (Zinc White Copper)

Key Features

  • Excellent Cold Workability: Suitable for precision stamping.

  • High Corrosion Resistance: Ideal for marine and chemical environments.

  • Aesthetic Silver Appearance: High nickel content (11-13%).

  • Balanced Electrical Properties: Used in resistors and thermocouples.

Common Forms & Dimensions

Form

Dimensions

Notes

Rods

Diameter: 5-200mm, Length: 1000-6000mm

Custom cutting available

Plates

Thickness: 0.5-50mm, Width: 200-2000mm

Polished or coated surfaces

Strips/Coils

Thickness: 0.1-3.0mm, Width: 10-600mm

For continuous stamping

Tubes

OD: 10-150mm, Wall Thickness: 0.5-10mm

Heat exchangers & fluid systems

Profiles

Custom shapes (hexagon, square, etc.)

For structural components

Chemical Composition

Element

Content (%)

Standard Range

Cu + Ag

63.5-66.5

ASTM B151M/B206M

Ni + Co

11.0-13.0

Zn

Balance

Pb

≤0.05

Fe

≤0.25

Mn

≤0.50

Physical Properties

Property

Value

Test Standard

Density

8.8-8.9 g/cm³

Measured Data

Melting Point

1080-1100°C

Theoretical Calculation

Thermal Conductivity

40-50 W/(m·K)

ASTM E1461

Electrical Conductivity

10-15% IACS

ASTM B193

Thermal Expansion

16.5×10⁻⁶/°C (20-300°C)

General Data for Nickel Silver

Resistivity

0.25-0.30 μΩ·m

ASTM B193

Mechanical Properties

Condition

Tensile Strength (MPa)

Yield Strength (MPa)

Elongation (%)

Hardness (HB)

Annealed (O)

380-450

150-200

25-35

80-100

1/4 Hard (H01)

515-655

400-500

15-20

120-150

Hard (H04)

620-760

550-650

5-10

180-210

Data based on ASTM B151M testing.

Applications

  • Electronics: Sliding contacts, connectors.

  • Precision Instruments: Camera parts, optical devices.

  • Decorative Use: Nameplates, eyewear frames.

  • Industrial Equipment: Marine components, heat exchangers.

Standards

Standard Type

Code

Scope

Chemical Composition

ASTM B151M-2005

Rods and bars specifications

Mechanical Properties

ASTM B206M-1997

Strip and plate requirements

International

ISO 427-1983

Classification of nickel silver

UNS Grades

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