The effect of phosphorus on crack-sensitivity of austenitic Cr-Ni stainless steel weld metal is investigated with the segmented-circular groove test process. The test results indicate that the effect depends on ferrite content in weld metal and phosphorus is allowable up to 0.05%, 0.10%, 0.13%, 0.15% each 3%, 7%, 9%, 12% ferrite level calculated in accordance with schaeflier's data.