16Mnq??????????????????
????
?????????????MPa 345-305 ????????????bMPa 510-490???????5%??21??
Q345QC???????????Q345QC??????
??????
??????????????????????????????????????е?????????????
16Mnq???????????????????
?и?Э????????????????????1~2?????????????????????????47???????2013?????????????51
????????????????????????????г?????????????????????????????????????????????????
?????????????г?????ì???
?????????????????
10??2000??8000+ 32??
12??2000??8000+ 56??
12??2000??8000+ 70??
14??2000??8000+ 35??
14??2000??8000+ 70??
???????? ???????лл ?? ????? ?????16Mnq???????????
??????I??ú????40?????16Mnq??????????????????+??+??