Topics Covered
IntroductionChemical
CompositionPhysical PropertiesMechanical PropertiesOther DesignationsFabrication and Heat Treatment Welding Machinability Heat
Treatment
Introduction
Bronze alloys are many in number and they include:
- Phosphor bronze
- Tin bronze
- Aluminum bronze
- Silicon bronze
- Architectural bronze
- Manganese bronze
The UNS C92500 alloy is a leaded tin bronze copper casting alloy. The
datasheet given below provides an overview of the UNS C92500 alloy.
Chemical Composition
The chemical composition of the UNS C92500 leaded tin bronze copper casting
alloy is outlined in the following table.
| Element |
Content
(%) |
| Copper, Cu |
85.0-88.0 |
| Tin, Sn |
10.0-12.0 |
| Lead, Pb |
1.0-1.50 |
| Nickel, Ni |
0.80-1.50 |
| Zinc, Zn |
£ 0.50 |
| Phosphorus, P |
0.20-0.30 |
| Iron, Fe |
£ 0.15 |
| Aluminium, Al |
£ 0.0050 |
Physical Properties
The following table shows the physical properties of the UNS C92500
alloy.
| Properties |
Metric |
Imperial |
| Density |
8.80 g/cc |
0.318 lb/in³ |
Mechanical Properties
The mechanical properties of the UNS C92500 alloy are displayed in the
following table.
| Properties |
Metric |
Imperial |
| Hardness, Brinell |
80 |
80 |
| Tensile strength |
305 MPa |
44200 psi |
| Yield strength (@strain 0.500%) |
140 MPa |
20300 psi |
| Elongation at break (in 50 mm) |
20.00% |
20.00% |
| Machinability (UNS C36000 (free-cutting brass) =
100) |
30 |
30 |
| Poisson's ratio |
0.34 |
0.34 |
| Elastic modulus |
117 GPa |
16969 ksi |
Other Designations
Equivalent materials to the UNS C92500 alloy are:
- ASTM B30
- ASTM B505
- QQ C390
- SAE J461
- SAE J462
Fabrication and Heat Treatment
Welding
Welding processes suitable for the UNS C92500 alloy include brazing and
soldering. Welding processes not recommended for this alloy include gas shielded
arc welding, carbon arc welding, coated metal arc welding and oxyacetylene
welding.
Machinability
The machinability rating of the UNS C92500 copper alloy is 30.
Heat Treatment
UNS C92500 can be stress relieved at 260°C (500°F), with a hold time of one hour per inch (25mm) of section thickness. This
alloy does not react to heat treatment.