Copper Casting Alloy UNS C90200

Sep 18 2012

Topics Covered

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

Introduction

Copper casting alloy UNS C90200 is a cast bronze alloy of copper and zinc. Bronzes are preferred in architecture for their color and lustre. Bronzes last longer than many alloys.

The following datasheet provides chemical composition and properties of UNS C90200 alloy.

Chemical Composition

The chemical composition of UNS C90200 alloy is given in the following table.

Element Content (%)
Cu 93
Sn 7

Physical Properties

The following table details the physical properties of UNS C90200 alloy.

Properties Metric Imperial
Density 8.80 g/cm3 0.318 lb/in³

Mechanical Properties

The mechanical properties of UNS C90200 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 70 70
Tensile strength 262 MPa 38000 psi
Yield strength 110 MPa 16000 psi
Elongation at break 30.00% 30.00%
Machinability 20 20

Fabrication and Heat Treatment

Machinability

UNS C90200 alloy has a machinability rating of 20.

Welding

The preferred welding techniques for UNS C90200 alloy are soldering, oxyacetylene welding, brazing, carbon arc welding, gas shielded arc welding and coated metal arc welding.

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