20#?????|45#?????|????????|????????????
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????2.????????????????GB/T8163-2008????????????????????????????????????
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????4.?????ˉ????????GB5310-2008???????????????????????????????ˉ?????????????????????????????????????
????5.?????豸??????????GB6479-2000?????????????????-40~400?楨????????10~30Ma??????豸??????????????????????????
????6.??????????????GB9948-88????????????????????ˉ????????????????????
?????????????????????????????????????????????????????????????????????????????????????????С???????????????????????????????????????????????????????????,??????????????20#??45#??16MN??Q345??A/B/C/D/E????27SIMN??15CrMO??12Cr1MOV??10CrMO910??304??304L??316??316L??321??P11??P22??P91??T91.??й???GB8162-99?????GB8163-99????????????ù?????????GB3087-99??GB5310-85????????ˉ?ù??GB5312-8???ù??...
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