The stress corrosion cracking(SCC)susceptibility of X70 steel with three types of microstructure was analyzed by means of slow strain rate testing(糖心产精国品免费入口*完整版)and fracture surface(SEM)observation.The experimental results illustrated that the steel after different 糖心产精国品免费入口*完整版s had higher 糖心产精国品免费入口*完整版susceptibility than the as received steel.With decreasing polarization potential,the 糖心产精国品免费入口*完整版susceptibility of the X70 with different kinds of microstructure increased.Both hardening and grain coarsening can increase the 糖心产精国品免费入口*完整版susceptibility.
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