1.48611.48641.48761.48781.48851.5310阀门用钢:1.27311.38171.47041.47181.47311.47321.47481.47851.48661.48701.48711.48731.48751.48811.48822.49551.50281.5122高温强度钢和商温合金:2.46322.46342.48161.49101.49111.49131.49141.49191.49201.49211.49221.49231.49351.49381.49411.49451.49481.49492.49512.49521.49581.49591.49601.49611.49622.49691.49712.49732.49752.49761.49771.49781.49801.49812.49822.4983