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
CC-483K
Chemical Composition
(%max, unless shown as range or min)
| Cu* | Al | Fe | Mn | Ni** | Si | Sn | Zn |
| Min/Max | 78.0-85.0 | 9.0-11.0 | 2.0-4.0 | 1.5 | 4.0-5.5 | 0.25 | 0.2 | 0.3 |
* Cu value includes Ag.
** Ni value includes Co.
Note: Cu + Sum of Named Elements, 99.5% min.
Applicable Specifications
* Bar, Rod – ASTM B150
* AMS 4640
* SAE J461
* SAE J463
Fabrication Processes
* Forging
* Hot Forming
Standard Temper Designation:
* Bar, Rod – HR50 – Drawn and Stress Relieved
* Shapes – M30 – As Hot Extruded; O30 – Hot Extruded and Annealed
Fabrication Properties
| Joining Technique | Suitability |
| Soldering | Not Recommended |
| Brazing | Fair |
| Oxyacetylene Welding | Not Recommended |
| Gas Shielded Arc Welding | Good |
| Coated Metal Arc Welding | Good |
| Spot Weld | Good |
| Seam Weld | Good |
| Butt Weld | Good |
| Capacity for Being Cold Worked | Poor |
| Capacity for Being Hot Formed | Good |
| Forgeability Rating | 75 |
| Machinability Rating | 30 |
Mechanical Properties (ASTM B505)
Form | Diameter or Distance Between Parallel Surfaces, in. [mm] | Tensile Strength, min | Yield Strength, at 0.5% Extension Under Load, min | Elongation in 4xdiameter or 4xthickness, min, % |
ksi | MPa | ksi | MPa |
Shapes | All Sizes | 85 | 585 | 42.5 | 295 | 10 |
Rod and Bar | 1/2 [12.7] to 1 [25.4] incl. | 100 | 690 | 50 | 345 | 5 |
| over 1 [25.4] to 2 [50.8] incl. | 90 | 620 | 45 | 310 | 6 |
| over 2 [50.8] to 3 [76.2] incl. | 85 | 585 | 42.5 | 295 | 10 |
Physical Properties
| US Customary | Metric |
| Melting Point – Liquidus | 1930 F | 1054 C |
| Melting Point – Solidus | 1895 F | 1035 C |
| Density | 0.274 lb/in3 at 68 F | 7.58 gm/cm3 at 20 C |
| Specific Gravity | 7.58 | 7.58 |
| Electrical Resistivity | 116 ohms-cmil/ft at 68 F | 19.28 microhm-cm at 20 C |
| Electrical Conductivity | 7 %IACS at 68 F | 0.041 MegaSiemens/cm at 20 C |
| Thermal Conductivity | 22.6 Btu · ft/(hr · ft2·°F) at 68 F | 39.1 W/m ·°K at 20 C |
| Coefficient of Thermal Expansion | 9·10-6 per °F (68-572 F) | 16.2·10-6 per °C (20-300 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 | 17500 ksi | 121000 MPa |
| Modulus of Rigidity | 6400 ksi | 44130 MPa |
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