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Copper-zinc alloys, as brazing materials, are primarily used in gas flame brazing, high-frequency brazing, salt bath immersion brazing, and for brazing copper, copper alloys, as well as nickel, steel, and carbide materials. Before brazing, it is essential to thoroughly remove oil, oxides, and contaminants from the brazing area and the brazing material surface. The optimal gap for brazed joints is 0.025-0.1mm.
When using an oxygen-acetylene flame for brazing, an oxidizing flame should be used to reduce zinc evaporation in the brass brazing alloy. The heating time should be minimized to avoid overheating, which may lead to excessive oxidation at the joint and the formation of porous welds. Additionally, brazing solvents must be used to achieve high-quality brazed joints.
| Product Number | Related Standard | Chemical Composition(%) | Total Impurities | Melting Range(℃) | Brazing Temperature (℃) | Application | ||||
| Cu | Zn | Ni | Other | Solidus (°F/°C) | Liquidus (°F/°C) | |||||
| Scu | ≥99.9 | / | ≤0.15 | 1918/1083 | 1918/1083 | |||||
| SCu48Zn | GB/T：HL102 | 46-50 | rem. | / | 1580/860 | 1598/870 | 850-885 | |||
| SCu54Zn | GB/T：HL103 | 52.0- 56.0 | rem. | / | 1625/885 | 1630/888 | 890-900 | |||
| SCu60ZnSi | 59-61 | rem. | / | Si:0.25 | 1634/890 | 1652/900 | 900-930 | |||
| Scu62ZnNiMnSi | GB/T：HL104 | 61-63 | rem. | 0.3-0.5 | Mn、Si、 Sn | 1562/850 | 1607/875 | 910-935 | Suitable for brazing materials such as copper, mild steel, cast iron, nickel alloy and carbide knives. | |
| SCu60ZnSnSi | GB/T：S221 | 59-61 | rem. | / | Sn:0.8-1.2 Si:0.15-0.25 | 1634/890 | 1652/900 | 880-900 | ||
| SCu59ZnSn | 58-60 | rem. | / | Sn:10、Si | 1472/800 | 1544/840 | 900-930 | Suitable for brazing copper, steel, and carbide alloy | ||
