Copper is the austenite stablizer in austenitic stainless steel, that increases Stacking fault energy (SFE). The copper-containing austenitic stainless steels a higher degree of formability, strength and ductility. The phenomena of precipitation hardening is obvious when copper content gets over 3%. When the copper content is over 3% roll cracking is prone to occur during the hot rolling process. A Gleeble 2000 hot tensile test machine was used to conduct the hot tensile tests. The test results revealed that (1) the embrittlement region occurs at 1000°C. and (2) in both parallel and vertical press direction, the most suitable hot working temperature of austenitic stainless steels should be above 1100°C.