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Phosphor-copper brazing alloy exhibits self-fluxing properties when brazing copper and silver, eliminating the need for additional flux, thus saving time and costs associated with flux application before brazing. However, when brazing copper alloys (e.g., brass or bronze), it should be used in conjunction with flux to achieve better joint performance.
| Product Number | Related Standard | Chemical Composition(%) | Total Impurities | Melting Range(℃) | Characteristic | Application | ||||
|---|---|---|---|---|---|---|---|---|---|---|
| Cu | P | Sn | Other | Solidus (°F/°C) | Liquidus (°F/°C) | |||||
| SCuP-1 | GB/T：BCu92P JIS：TC-310D | rem. | 7.5-8.5 | ≤0.15 | 1310/710 | 1436/780 | Close to eutectic composition, low melting point, with good flowability, spreadability, and gap-filling capabilities, suitable for small-gap brazed joints. | Suitable for copper and copper alloy components, as well as refrigeration and gas appliances. Not recommended for welding areas subject to impact, vibration, or bending. | ||
| SCuP-2 | GB/T：BCu93P AWS：BCuP-2 JIS：TC-310A | rem. | 6.8-7.5 | 1310/710 | 1472/790 | Lower phosphorus (P) content improves ductility, with a slightly higher melting point. | Suitable for brazing copper and copper alloy components, used in air conditioners, refrigerators, evaporators, heat exchangers, and water heaters. Can be made into brazing rings and is ideal for brazing medium-gap joints. | |||
| SCuP-3 | rem. | 6.1-6.8 | 1310/710 | 1508/820 | Low phosphorus (P) content with good ductility and a slightly higher melting point. | Suitable for making various brazing rings and flat wires, brazing copper and copper alloy components, and brazing large-gap joints. | ||||
