Aug 22 2012
Topics Covered
IntroductionChemical
CompositionPhysical PropertiesMechanical PropertiesOther Designations
Introduction
Pure copper has good thermal and electrical conductivity. Alloying elements
such as tin, zinc, nickel, beryllium etc., are added to copper to improve its
characteristics. For instance, silicon is added to improve wear resistance, lead
is added to improve its machinabilty, and tin, aluminum, nickel, iron and
silicon are added to improve its corrosion resistance.
As much as 400 copper alloys are available with unique characteristics to
suit various applications. The following datasheet will discuss the UNS
C90800 copper casting alloy.
Chemical Composition
The chemical composition of the UNS C90800 copper alloy is outlined in the
following table.
Element |
Content
(%) |
Copper, Cu |
87 |
Tin, Sn |
12 |
Phosphorus, P |
0.2 |
Physical Properties
The physical properties of the UNS C90800 copper alloy are tabulated
below.
Properties |
Metric |
Imperial |
Density |
8.67 g/cc |
0.313 lb/in³ |
Mechanical Properties
The following table shows mechanical properties of the UNS C90800 copper
alloy.
Mechanical
Properties |
Metric |
Imperial |
Hardness, Brinell (500kg) |
95 |
95 |
Tensile strength, ultimate |
≥ 345 MPa |
≥ 50000 psi |
Tensile strength, yield |
≥ 145 MPa |
≥ 21000 psi |
Elongation at break |
≥ 12.0 % |
≥ 12.0 % |
Poisson's ratio |
0.34 |
0.34 |
Elastic modulus |
117 GPa |
16969.4 ksi |
Other Designations
Other designations that are equivalent to the UNS C90800 copper alloy
include: