Brass brazing alloys also called Copper-Zinc brazing alloys, could be divided into normal brass alloy and special brass alloy.Different from normal brass alloy, special brass alloy is a multi-component copper alloy composed with Sn, Mn,Ni, Fe, Si and other elements. Special brass alloys have better brazing properties than normal copper-zinc alloys. It could provide better brazing strength , higher corrosion resistance, more convenient brazing process,ect.
For example, the addition of Sn can reduce the melting point of common copper-zinc alloy, make brazing temperature lower and easier to operate; the addition of Mn can improve the strength of copper-zinc alloy, more suitable for the use of cemented carbide products.
Alloy often used with liquid flux dosed directly on the torch flame through the appropriate vaporizer.
Used as filler or for reconstructing gear teeth, bearings, shafts, valve seats, steering joints, handlebars and bicycles .
| Area Of Application | Working Temperature C' | Melting Range C' | Composition By Weight % | Standards | |||||||
|---|---|---|---|---|---|---|---|---|---|---|---|
| Ni | Mn | Si | Sn | Cu | Zn | ISO 17672 (2010) |
EN 1044 (1999) |
DIN 8513 ISO 6377 (1995) |
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| To connect copper to copper, iron to iron and all types of cast iron | Minimum heat temperature up to 900˚C |
875_895 | - | - | 0.3 | 0.2 | 60 | Rem | Cu 470& Cu470a |
CU 301 | L-CuZn40 B Cu60Zn(Si) |
| 875_895 | - | - | 0.3 | 0.4 | 60 | Rem | Cu 470& Cu470a |
CU 302 | L-CuZn40 B Cu60Zn(Sn)(Si) |
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| 875_900 | - | 0.15 | 0.25 | 0.2 | 60 | Rem | Cu471 | CU 303 | L-CuZn40 B Cu60Zn(Sn)(Mn) |
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| 875_900 | - | 0.15 | 0.25 | 0.3 | 60 | Rem | - | CU 304 | L-CuZn39Sn B Cu60Zn(Sn)(Si)(Mn) |
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| 890_920 | 10 | 0.2 | 0.25 | 0.2 | 48 | Rem | - | CU 305 | L-CuNi10Zn42 B CuZn39Sn BCu59ZnSn(Sn)(Si)(Mn) |
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| 870-890 | 1 | 0.6 | 0.3 | 1.0 | 59 | Rem | - | CU 306 | L-CuZn39Sn B Cu59ZnSn(Ni)(Mn)(Si) |
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