Abstract: Through a series of comparative tests, the differences between transverse tensile test of the welded joint and those of the full welding and base metal were studied. The rationality of the yield strength and the elongation of the welded joint by the transverse tensile test was also explored. The results showed that the yield strength obtained by transverse tensile test was between those of the base metal and the full welding, and the test results were affected by the scale distance of the extensometer gauge. The tensile strength value of transverse tensile specimen was nearly 20 MPa higher than that of the base metal, while the fracture position of transverse tensile specimen was in the base metal. The percentage elongation after fracture was nearly 10% lower than that of the base metal, but still higher than that of the the full welding.