ALUMINUM ALLOY BRAZING SHEET HAVING HIGH STRENGTH CHARACTERISTICS AT HIGH TEMPERATURE AND SACRIFICIAL ANTICORROSIVE EFFECT

摘要

PURPOSE:To obtain the titled brazing sheet by using an Al alloy contg. a specified percentage of Ga, In or Sn as a core material and an Al alloy contg. a specified percentage each of Si, Mg and Ga, In or Sn as a cladding material. CONSTITUTION:An Al alloy contg. 0.01-0.50wt% one or more among Ga, In and Sn in used as a core material. The alloy may further contain one or more among 0.2-3.0% Zn, 0.01-0.5% Zr, 0.01-0.5% Cr, 0.2-1.5% Mn, 0.01-1.5% Cu, 0.1-2.5% Mg, 0.1-0.6% Fe and 0.01-0.5% Ti. An Al alloy contg. 5.0-13.0% Si, 0.4-2.5% Mg and 0.01-0.50% one or more among Ga, In and Sn is used as a cladding material. The alloy may further contain one or more among 0.01- 1.0% each of Bi, Na, K and Li, 0.01-0.5% each of Be and Ca, and 0.01-0.8% each of Ba, Sr and Sb. An Al alloy brazing sheet is composed of said core and cladding materials.