Tin Bronze (Phosphorus Bronze) filler metal is a copper-tin alloy. It is used to weld bronze, brass and copper. Phosphor Bronze A is frequently used to repair castings and join copper-tin alloys of similar chemical composition.
| Alloy | Chemical Composition(%) | Solidus | Liquidus | Application | AWS A5.7 | ISO17672 | BS EN 14640 | DIN 1733 |
| CuSn5P | Cu:Balance Al:0.01 P:0.2 Sn:5.0 Other:0.5 | 910℃ | 1040℃ | Good resistance against corrosion and overheating. Ideal for overlay welding on steel, casting repair. | ERCuSn-A | CuSn6P | SG-CuSn6 | |
| CuSn8P | Cu:Balance P:0.2 Al:0.01 Sn:8.0 Fe:0.1 Other:≤0.5 | 875℃ | 1025℃ | Recommended for the joining welding of copper with Cu-Sn alloy.Best for the butt joining welding of brass with steel. Ideal for overlaying and building up bearing surfaces, bushes, impellor blades and valve seats etc. | ERCuSn-C | Cu 922 | CuSn9P | |
| CuSn10 | Cu:Balance Al:0.01 Mn:0.3 Si:0.3 Sn:10.0 Other:0.5 | 887℃ | 1020℃ | Suitable for the welding of copper with Cu-Sn alloy, especially for the Cu-Zn alloy with steel. Widely be used in repairing cast copper productd.Pre-heat suggested for large size products, and pulsed arc welding is recommend for multilayer on steel. | CuSn10 |
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