The　corrosion　of　pipe　is　most　common　problem　for　oil　and　gas　industry.　In　this　article,　three　kinds　of　tubes　will　be　analyzed　in　terms　of　their　resistance　against　stress　corrosion.　They　are　respectively　N80/1,　N80/Q　and　PI　10.　The　loading　method　chosen　in　this　test　is　constant　tensile　stress　loading.　In　the　test,　samples　will　be　separated　in　different　groups,　gradually　loaded　under　specific　levels　and　then　soaked　in　H2S　saturated　solution.　What　can　get　from　this　test　is　threshold　value　of　stress　corrosion　and　stress-life　curve,　which　can　be　used　for　evaluating　the　stress　corrosion　property　of　materials,　as　well　as　giving　guidance　for　practical　engineering.