20#??????ù????**16Mn??????GB6479??????ù?**??????????????
20#??????ù????
20#?????????20#???????15??????????????????????????????????????????????????????????
?綃???????????????????????????С???????????????????????????????????????????????λ???????????????á???????????????????????????????
20#??????????????????????
????????20??
?????????GB8162-2008 GB/T8163-2008 GB3087-2008 GB9948-2006 GB5310-2008 GB6479-2000
16Mn??????GB6479??????ù?
16Mn???????16Mn?е?????????? ??????????????????0.1%-0.25%,?????????????????衢???????????????????????<3%?????????300??350??400??450MPa??4???????????Q295??Q345??Q390??Q420??Q460????
16MN????
??Q?????????????????????????д????????????????????С????????s????????????????????????????????????????????????????????仯?????A??B??C??D????????A??B?????????16Mn
????16Mn???????????
????C??0.12~0.20?? Mn:1.20~1.60?? Si:0.20~0.55?? ????????470~660?/???????? ????????275~345?/???????? ?????21%??????????????????????????????????????????????16~100mm
??????????????:[(??-???)*???]*0.02466=kg/??(????????)
GB6479??????ù????????????????-40~400?楨????????10~30Ma??????豸??????????????????????????
???????????????硢?????????????????????????????Q235A??B?????GB/T14980-1994????????????????????紙????????ˉ?????????????????????ú???????????????????????????????????????????Q235A?????
??????????????????????????
??????б????GB6479-2000??ASTM DIN JIS
????????????20# 16Mn??15CrMo,12CrMo??12Cr2Mo??
?????????????????????????????????????????????????????????????????????????????????????????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
|
?????λ???
?? ? ? ?? 
