Keywords pressure vessel;low-alloy high-strength steel;wet H_2S;nitrate environment;SCC;susceptibility condition;threshold value;estimation method;preventive countermeasure;

• 压力容器;低合金高强钢;湿H_2S环境;硝酸盐环境;应力腐蚀开裂;敏感性条件;门槛值;估算方法;预防对策;