20#??????ù?\16Mn??????ù?\GB6479??????????????
??????ù??GB6479-2000??????????豸?????????????????????豸???????????????????????????20??16Mn??
12CrMo??12Cr2Mo???
??????????ù??GB6479-86?????????????????-40~400?楨????????10~30Ma??????豸?????????????????????????
?????????豸?????????GB6479-2000?????????????????-40~400?楨????????10~30Ma??????豸??????????????????????????
??????????????????????????
??????б????GB6479-2000??ASTM DIN JIS
????????????20# 16Mn??15CrMo,12CrMo??12Cr2Mo??
??????????????????????λ???????????????????г?--?й?????????????????????????????????????????????????????????????? ?????????????????????????????????????????8-1240??1-200mm????????????????????????????:?????????????????????????,???и????ˉ????????????????;???????????и???????????????????????????????????????????????п????????? ????????????????????ι????????? ??????????????γ????????????????8500???????800?????????????????????????????????й?????????????????ú???????????????ˉ????е????????????????????????????????????????????????????????????????30???????С????????????м???????????????????? ??????????20#??45#??16MN??Q345??A/B/C/D/E????27SIMN??15CrMO??12Cr1MOV?? 10CrMO910??304??304L??316??316L??321??P11??P22??P91??T91??
?????????????????????????????????????????????????????????????????????????????????????????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??...
???????????0510-88264321??88223334 ???棺0510-88223334 ?????18921237777
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