Copper Alloy (UNS C94500)

Topics Covered

Introduction
Chemical Composition
Physical Properties
Mechanical Properties
Thermal Properties
Other Designations
Fabrication and Heat Treatment
     Machinability
     Welding
     Heat Treatment
Applications

Introduction

Copper is easiy to mine and refine compared to many other metals. It has been in use for several thousand years. It can be obtained from the ores cupritemalachite, covellite, chalcocite, tenorite,and bornite. It finds use in electrical, marine, defense, construction, architecture, and jewelry sectors.

The following datasheet gives an overview of UNS C94500 copper alloy.

Chemical Composition

The following table shows the chemical composition of UNS C94500 copper alloy.

Element Content (%)
Copper, Cu 73
Lead, Pb 16-2
Tin. Sn 6-8
Zinc, Zn ≤ 1.20
Nickel, Ni ≤ 1.0
Antimony, Sb ≤ 0.80
Phosphorus, P ≤ 0.50
Iron,Fe ≤ 0.15
Sulfur, S ≤ 0.080
Silicon, Si ≤ 0.0050
Aluminum, Al ≤ 0.0050

Physical Properties

The physical properties of UNS C94500 copper alloy are tabulated below.

Properties Metric Imperial
Density 9.40 g/cm3 0.340 lb/in3

Mechanical Properties

The mechanical properties of UNS C94500 copper alloy are outlined in the following table.

Properties Metric Imperial
Tensile strength 170 MPa 24700 psi
Yield strength 83.0 MPa 12000 psi
Elongation at break (in 50 mm) 12% 12%
Poisson's ratio 0.34 0.34
Elastic modulus 117 GPa 17000 ksi
Compressive strength 250 MPa 36300 psi
Izod impact 5.40 J 3.98 ft-lb
Fatigue strength (@# of cycles 1.00e+8, rotating beam) 69 MPa 10000 psi
Hardness, Brinell 50 50
Machinability (UNS C36000 (free-cutting brass) = 100) 80 80

Thermal Properties

The thermal properties of UNS C94500 copper alloy are given in the following table.

Properties Metric Imperial
Thermal expansion co-efficient (@ 20-200°C/68- 392°F) 18.5 µm/m°C 10.3 µin/in°F
Thermal conductivity (@ 20°C/68°F) 52 W/mK 361 BTU in/hr.ft2.°F

Other Designations

Other designations that are equivalent to UNS C94500 copper alloy include:

  • ASTM B30
  • ASTM B66

Fabrication and Heat Treatment

Machinability

The machinability rate of UNS C94500 copper alloy is 80.

Welding

UNS C94500 copper alloy can be welded using soldering and brazing processes. Oxyacetylene welding, gas shielded arc welding, carbon arc welding, and coated metal arc welding are not used for welding this alloy.

Heat Treatment

UNS C94500 copper alloy can be stress relieved at the temperature of about 260°C (500°F). The time taken for stress relieving is about 1 hr/in. of section thickness. It does not respond to heat treatment.

Applications

UNS C94500 copper alloy can be mainly used in high-speed low-load bearings and locomotive wearing parts.

Tell Us What You Think

Do you have a review, update or anything you would like to add to this article?

Leave your feedback
Submit