Abstract: MnCuAl alloy and 430SS steel were induction brazed using Cu-34Mn-6Ni-xSn（x=6, 8, 10wt%） fillers. The microstructure, microhardness and shear strength of the joints were observed and measured, the effect of the filler composition on the microstructure and mechanical peoperties were analyzed. The results show that the Sn content of the filler can change the width of the brazing seam, the morphology and width of the incomplete wetting zone at MnCuAl side, and the hardness of the brazing seam center. The widths of brazing seams using 6Sn and 8Sn fillers are almost the same, while the width of brazing seam using 10Sn filler decreases obviously. The width of the incomplete wetting zone using 6Sn, 8Sn and 10Sn are 0μm, 200 μm and 460 μm, respectively. The average hardness of the seam center increases gradually from 6Sn to 10Sn joint,which is consistent with the trend of the filler metal itself. The shear strength of the solder joint using 6Sn, 8Sn and 10Sn is 320, 307 and 293 MPa, respectively. The fracture modes are all mixed fracture, the crack penetrates the IMC layer at the MnCuAl side and the center of the brazing joint.