Tin Brass Copper Alloy UNS C43000

Nov 13 2012

Topics Covered

Introduction
Chemical Composition
Physical Properties
Mechanical Properties
Thermal Properties

Introduction

Tin brass copper alloy UNS C43000 is an alloy of copper and zinc. On varying the composition of the impurities in the alloy, the characteristics of the alloy can be modified. UNS C43000 copper alloy gives perfect results when cold formed which makes it ideal for machining. Color and shape of the metal can be varied as desired. Water fittings are made of brass due to its anti-corrosive nature. UNS C43000 has good electrical and thermal conductivity.

The following table summarizes the chemical composition and properties of UNS C43000 copper alloy.

Chemical Composition

The chemical composition of tin brass copper alloy UNS C43000 is shown in the following table.

Element Content
Copper, Cu 87.0%
Tin, Sn 2.2%
Zinc, Zn 10.8%

Physical Properties

The following table provides the physical properties of UNS C43000.

Properties Metric Imperial
Density 8.75 gm/cm3 0.316 lb/in3
Melting point - liquidus 1025ºC 1877ºF
Melting point - solidus 1000ºC 1832ºF

Mechanical Properties

The mechanical properties of UNS C43000 copper alloy are shown in the following table.

Properties Metric Imperial
Tensile strength 317 - 648 MPa 46000 - 94000 psi
Elongation at break 55.00% 55.00%
Poisson's ratio 0.34 0.34
Elastic modulus 117 GPa 16969 ksi

Thermal Properties

The following table gives the thermal properties of UNS C43000.

Properties Metric Imperial
Thermal expansion co-efficient (@Temperature 20.0 - 100°C ) 18.4 µm/m°C 10.2 µin/in°F
Thermal conductivity 119 W/mK 826 BTUin/hr.ft²°F
Specific heat capacity 0.380 J/g°C 0.0908 BTU/lb°F

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