Aluminium brazing sheet with a high strength and excellent corrosion performance
AssigneeSapa Heat Transfer AB
InventorsStefan Norgren, Linda Ahl
Life of this patent
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Abstract
An aluminium alloy brazing sheet including: a core material made of an aluminium alloy; and a cladding material clad on at least one side of the core material and made of an aluminium alloy having a potential lower than that of the core material. The cladding material is an outermost layer of the brazing sheet, wherein the cladding material is made of an aluminium alloy including 0.2 to 2.0 wt % of Mg, 0.5 to 1.5 wt % of Si, 1.0 to 2.0 wt %, preferably 1.4-1.8% of Mn, ≦0.7 wt % of Fe, ≦0.1 wt % of Cu, and ≦4 wt % of Zn, ≦0.3 wt % each of Zr, Ti, Ni, Hf, V, Cr, In, Sn and ≦0.5 wt % total of Zr, Ti, Ni, Hf, V, Cr, In, Sn, the remainder being Al and unavoidable impurities.
Claims17
An aluminium alloy brazing sheet comprising:
- a core material made of an aluminium alloy;
- and a cladding material clad on at least one side of the core material and made of an aluminium alloy having a corrosion potential lower than that of the core material, the cladding material being an outermost layer of the brazing sheet, wherein the cladding material is made of an aluminium alloy consisting of 0.2 to 2.0 wt % of Mg, 0.5 to 1.5 wt % of Si, 1.0 to 2.0 wt %, preferably 1.4-1.8% of Mn, ≦0.7 wt % of Fe, ≦0.1 wt % of Cu, and ≦4 wt % preferably ≦1.4 wt %, more preferably ≦1.1 wt %, most preferably ≦0.4 wt % of Zn, ≦0.3 wt % each of Zr, Ti, Ni, Hf, V, Cr, In, Sn and ≦0.5 wt % total of Zr, Ti, Ni, Hf, V, Cr, In, Sn the remainder being Al and unavoidable impurities.
Dependencies are inferred from the claim text.