CuSn12-C
CuSn12
En1982 ; Din1705
Typical Uses
This material has proved its value in sliding bearings and withstands moderate bearing pressures very well with adequate lubrication. Especially in the engineering industry, can be manufactured economically from this material. The unique composition results in good wear and running properties, as well as good relief of end pressures and excessive stresses from inadequate or occasional interruptions of lubrication. The surface finish and hardness requirements for the opposing material are not so great as with hightin bronzes. With good lubrication, unhardened shafts can be used. The alloy has good sliding and emergency running properties
CC483K- CuSn12
Chemical Composition
| Cu* | Al | Sb | Fe | Pb | Ni* | P | Si | S | Sn | Zn |
| Min/Max | 85-88.5 | 0.01 | 0.15 | 0.2 | 0.7 | 2.0 | 0.60 | 0.01 | 0.05 | 11.0-13.0 | 0.5 |
* In Determining Cu min, Cu may be calculated as Cu + Ni.
Note: Cu + Sum of Named Elements, 99.5% min.
Applicable Specifications
* EN1982
Fabrication Processes
| Joining Technique | Suitability |
| Soldering | Excellent |
| Brazing | Good |
| Oxyacetylene Welding | Fair |
| Gas Shielded Arc Welding | Fair |
| Coated Metal Arc Welding | Fair |
| Machinability Rating | 20 |
Mechanical Properties (EN1982)
| Tensile Strength, minA | Yield Strength, at 0.5% Extension Under Load, minA | Elongation in 2 in.
or 50 mm, min, % |
| ksi | MPa | ksi | MPa |
| 40 | 276 | 25 | 172 | 10 |
A Minimum tensile strength and yield strength shall be reduced 10% for cast bars having a cross section, thickness, diameter, or wall of 4 in. (102 mm) or more. The cross sections are the diameter of a round solid, the distance across the flats of a solid hexagon, the thickness of a rectangle, and the wall thickness of a tube.
Physical Properties
| US Customary | Metric |
| Melting Point – Liquidus | 1830 F | 999 C |
| Melting Point – Solidus | 1528 F | 831 C |
| Density | 0.317 lb/in3 at 68 F | 8.77 gm/cm3 at 20 C |
| Specific Gravity | 8.77 | 8.77 |
| Electrical Resistivity | 107.4 ohms-cmil/ft at 68 F | 17.86 microhm-cm at 20 C |
| Electrical Conductivity | 10 %IACS at 68 F | 0.056 MegaSiemens/cm at 20 C |
| Thermal Conductivity | 40.8 Btu · ft/(hr · ft2·°F) at 68 F | 70.6 W/m ·°K at 20 C |
| Coefficient of Thermal Expansion | 10.2·10-6 per °F (68-392 F) | 18.4·10-6 per °C (20-200 C) |
| Specific Heat Capacity | 0.09 Btu/lb/°F at 68 F | 377.1 J/kg · °K at 20 C |
| Modulus of Elasticity in Tension | 15000 ksi | 103400 MPa |
| Magnetic Permeability | 1.0 | 1.0 |
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