Soldering of steel using soft solders
2009
Brozek, M., Czech Univ. of Life Sciences, Prague (Czech Republic). Faculty of Engineering. Dept. of Material Science and Manufacturing Technology | Novakova, A., Czech Univ. of Life Sciences, Prague (Czech Republic). Faculty of Engineering. Dept. of Material Science and Manufacturing Technology
The paper contains strength tests results of joints soldered by use of lead and leadless solders. For tests lead solders of types Sn20Pb80, Sn40Pb60, Sn60Pb40 and type Sn63Pb37 and the leadless solders of types Sn95.5Ag3.8Cu0.7, Sn96Ag4 and type Sn99Cu1 and as jointed material the sheet iron of 1.0 mm thickness were used. Dimensions of test samples were of 20 x 100 x 1 mm. For heating the propane-butane and air flame was used. The tested assemblies were loaded using the universal tensile strength testing machine up to their failure. The force needed for failure and failure type (in the joint, in the basic material) were noted. From carried out tests it follows that practically the same results were obtained at lead solders of types Sn60Pb40 and Sn63Pb37 and at leadless solders of types Sn95.5Ag3.8Cu0.7 and Sn96Ag4. The solders Sn20Pb80, Sn40Pb60 and Sn99Cu1 showed in some degree lower stress values. On the basis of the carried out tests evaluation it is possible to say that the lead solders substitution for the leadless ones in light of the bonded joint strength is possible and in practice no problems should occur.
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