| 摘要 |
PCT No. PCT/JP91/00327 Sec. 371 Date Oct. 31, 1991 Sec. 102(e) Date Oct. 31, 1991 PCT Filed Mar. 11, 1991 PCT Pub. No. WO91/13719 PCT Pub. Date Sep. 19, 1991.A brazing sheet having an Al alloy core material one or each of whose surfaces is clad with a brazing material, the brazing sheet being excellent in vacuum brazing ability suitable for the manufacture of aluminum heat exchangers that have a hollow structure. The brazing material is an Al-Mg-Si alloy brazing material comprising 0.6 to 1.8 wt % of Mg, 6.0 to 20.0 wt % of Si, and the balance of Al and inevitable impurities, and having, in its metal texture, 1,000/mm2 or more Mg2Si particles 2 to 5 mu m in diameter, with the particles being assumed to be spheres, and 3,000/mm2 or more Si particles 6 mu m or less in diameter, with the particles being assumed to be spheres.
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