Sep 18 2012
Topics Covered
IntroductionChemical CompositionPhysical PropertiesMechanical PropertiesThermal PropertiesOther DesignationsFabrication and Heat Treatment Machinability Welding Heat Treatment
Introduction
High-leaded tin bronze UNS C93700 copper casting alloy is an alloy of copper-tin-lead. The addition of nickel in the alloy enhances the strength and ductility. UNS C93700 copper alloy is resistant to biofouling and corrosion.
The following datasheet provides the chemical composition and properties of UNS C93700 alloy.
Chemical Composition
The chemical composition of UNS C93700 copper alloy is given in the following table.
| Element |
Content (%) |
| Cu |
80 |
| Pb |
10 |
| Sn |
10 |
Physical Properties
The following table details the physical properties of UNS C93700 alloy.
| Properties |
Metric |
Imperial |
| Density |
8.95 g/cm3 |
0.323 lb/in³ |
Mechanical Properties
The mechanical properties of UNS C93700 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 |
60 |
60 |
| Elongation at break |
20.0% |
20.0% |
| Machinability |
80 |
80 |
| Izod impact |
7.00 J |
5.16 ft.lb |
| Compressive strength |
90.0 MPa |
13100 psi |
| Fatigue strength |
90.0 MPa |
13100 psi |
| Charpy impact |
15.0 J |
11.1 ft.lb |
Thermal Properties
The following table outlines the thermal properties of UNS C93700 alloy.
| Properties |
Metric |
Imperial |
| Thermal expansion co-efficient (@ 100°C/212°F) |
17.8 µm/m°C |
9.89 µin/in°F |
| Thermal conductivity (@20°C/68°F) |
46.9 W/mK |
325 BTU in/hr.ft²°F |
Other Designations
Equivalent designations to UNS C93700 copper alloy include:
- AMS 4827
- AMS 4842
- ASME SB584
- ASTM B271
- ASTM B30
- ASTM B505
- ASTM B584
- ASTM B763
- QQ C390
- SAE J461
- SAE J462
Fabrication and Heat Treatment
Machinability
UNS C93700 alloy has a machinability rating of 80.
Welding
The preferred welding techniques for UNS C93700 copper alloy are soldering and brazing. Carbon arc welding, oxyacetylene welding, gas shielded arc welding and coated metal arc welding are not recommended for this alloy.
Heat Treatment
The stress relieving temperature of UNS C93700 alloy is 260°C (500°F). UNS C93700 copper alloy does not respond to heat treatment.