Copper Alloy (UNS C81540)

Topics Covered

Introduction
Chemical Composition
Physical Properties
Mechanical Properties
Thermal Properties
Applications

Introduction

Copper combines with a wide range of alloying elements to produce alloys such as copper-nickel, aluminum bronze, nickel silver, tin bronze, etc. The addition of alloying elements in turn improves corrosion and wear resistance, and machinability.

The following datasheet discusses the chemical composition and properties of copper UNS C81540.

Chemical Composition

The chemical composition of copper UNS C81540 is given in the following table.

Element Content (%)
Copper, Cu 95.6 - 97.5
Nickel, Ni 2 - 3
Silicon, Si 0.40 - 0.80
Chromium, Cr 0.10 - 0.60

Physical Properties

The following table discusses the physical properties of copper UNS C81540.

Properties Metric Imperial
Density 8.9 g/cm3 0.323 lb/in3

Mechanical Properties

The mechanical properties of UNS C81540 copper wires are tabulated below.

Properties Metric Imperial
Tensile strength ≥ 550 MPa ≥ 79800 psi
Yield strength ≥ 4 50 MPa ≥ 65300 psi
Elongation ≥ 15% ≥ 15%
Brinell hardness 192 192

Thermal Properties

The following table discusses the thermal properties of copper UNS C81540.

Properties Metric Imperial
Thermal conductivity 216 W/mK 125 BTU in/hr.ft2.°F
Coefficient of thermal expansion 17.5 µm/m°C 9.70 µin/in°F

Applications

Copper UNS C81540 finds application in:

  • Cores and cavities for injection molds
  • Flash weld dies
  • Molds for plastic parts
  • Resistance welding wheels
  • Tip welding and stud welding collets
  • Blow pins and pinch offs for blow mold.

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