ASME SA-387Gr22.CL.2材料中的CL.2是什么意思，如何对照SA387/SA387M查对应CL2的 化学成份

在ASME SA387里没有找到GR.22 的CL2，一般CL就是CLASS的简写 看具体英文说明 Each grade except Grades 21L, 22L, and 91 is available in two classes of tensile strength levels as defined in the Tensile Requirements tables. Grades 21L and 22L are available only as Class 1. Gra