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A sacrificial brazing fin stock for use in an aluminum base alloy heat exchanger comprises an aluminum base alloy core having a grain size of 100 m

A sacrificial brazing fin stock for use in an aluminum base alloy heat exchanger comprises an aluminum base alloy core having a grain size of 100 m

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A brazing fin stock comprising a core clad with a cladding layer, said core having a grain size of 100 mm or more and being made of an aluminum base alloy consisting essentially of from 0.5 to 2 wt.% of manganese plus iron, wherein the amount of said manganese is greater than the amount of said iron

A brazing fin stock comprising a core clad with a cladding layer, said core having a grain size of 100 mm or more and being made of an aluminum base alloy consisting essentially of from 0.5 to 2 wt.% of manganese plus iron, wherein the amount of said manganese is greater than the amount of said iron and the amount of said iron being an amount effective to increase the strength of said core and to provide a grain size of said core of 100 mm or more, from 0.1 to 0.7 wt.% of zinc, from 0.001 to less than 0.02 wt.% of tin and the balance is aluminum, said cladding layer being made of an alloy consisting essentially of from 5 to 15 wt.% of silicon and the balance is aluminum. A brazing fin stock comprising a core clad with a cladding layer, said core having a grain size of 100 mm or more and being made of an aluminum base alloy consisting essentially of from 0.5 to 2 wt.% of manganese plus iron, wherein the amount of said manganese is greater than the amount of said iron and the amount of said iron being an amount effective to increase the strength of said core and to provide a grain size of said core of 100 mm or more, from 0.1 to 0.7 wt.% of zinc, from 0.001 to less than 0.02 wt.% of tin and the balance is aluminum, said cladding layer being made of an alloy consisting essentially of from 5 to 15 wt.% of silicon, from 0.1 to 2 wt.% of magnesium and the balance is aluminum. A brazing fin stock comprising a core clad with a cladding layer, said core having a grain size of 100 mm or more and being made of an aluminum base alloy consisting essentially of from 0.5 to 2 wt.% of manganese plus iron, wherein the amount of said manganese is greater than the amount of said iron and the amount of said iron being an amount effective to increase the strength of said core and to provide a grain size of said core of 100 mm or more, from 0.1 to 0.7 wt.% of zinc, from 0.001 to less than 0.02 wt.% of tin and the balance is aluminum, said cladding layer being made of an alloy consisting essentially of from 5 to 15 wt.% of silicon, from 0.001 to 0.2 wt.% of bismuth, from 0.001-0.1 wt.% of beryllium and the balance is aluminum.