Patent ID: 7442445

Claim:
A brazing clad material, comprising: a composite material that comprises a base material and a brazing material layer formed integrally on the base material, wherein the brazing material layer comprises a Ni or Ni alloy layer, a Ti or Ti alloy layer and a Fe—Ni alloy layer that are sequentially stacked in this order on the base material, wherein the brazing material layer comprises a Fe concentration of 25 to 40 wt % in the entire brazing material layer, wherein the brazing material layer satisfies a ratio of W 1 /W 2 to be 0.56 to 0.66, where W 1 is a weight of Ni contained in the entire brazing material layer and W 2 is a total weight of Ni and Ti contained in the entire brazing material layer, wherein the brazing material layer comprises a diffusion reacting layer with a thickness of 2 to 6 μm, and wherein the diffusion reacting layer is formed at an interface between two hetero-metals of the Ni or Ni alloy layer, the Ti or Ti alloy layer and the Fe—Ni alloy layer to compose the brazing material layer.