Copper Casting Alloy UNS C85500

Topics Covered

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

Introduction

Copper casting alloy UNS C85500 possesses high machinability and corrosion resistance. Lead present in UNS C85500 behaves as a tool lubricant and microchip chip breaker. The UNS C85500 copper alloy is an alloy of copper, and lead which belongs to the cast category.

The following datasheet provides chemical composition and properties of UNS C85500.

Chemical Composition

The chemical composition of the UNS C85500 copper alloy is given in the following table.

Element Content (%)
Copper, Cu 59.0-63.0
Aluminium, Al 0.8
Zinc, Zn 38.2-39.0
Lead, Pb ≤0.20
Iron, Fe ≤0.20
Manganese, Mn ≤0.20
Nickel, Ni ≤0.20
Tin, Sn ≤0.20

Physical Properties

The following table details the physical properties of UNS C85500.

Properties Metric Imperial
Density 8.19 g/cc 0.296 lb/in³

Mechanical Properties

The mechanical properties of UNS C85500 copper alloy are shown in the following table.

Properties Metric Imperial
Elastic modulus 117 GPa 16969 ksi
Poisson's ratio 0.34 0.34
Hardness, Brinell 85 85
Tensile strength 414 MPa 60000 psi
Yield strength 159 MPa 23100 psi
Elongation at break 40.00% 40.00%
Machinability 80 80

Other Designations

Equivalent designations to UNS C85500 include:

  • QQ C390

Fabrication and Heat Treatment

Machinability

UNS C85500 copper alloy has a machinability rating of 80.

Welding

The preferred welding techniques for UNS C85500 are soldering and brazing. Carbon arc welding, oxyacetylene welding, gas shielded arc welding and coated metal arc welding are not recommended for this alloy.

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