Q345qC???????????????????
???????????????????????????????壬????????????????????????????????????β????q????????
????????????????????í??????????A3q?????????????????16q????????????????12Mnq??12MnVq??15MnVNq??16Mnq??????????????4.5~50?????
???????
????????í???????????·?????·?????????纣??????
????????
???????????????й??????????????????????????????????ASTM??ASME????????JISS????????DIN?????
???BS????????? IO????????EN ???????????????????????????????????и??????????????????????
?????????8-600mm???4.5m ??????18m????????????????? ?????????????????????m??0.5mm????????
100mm???8mm?????γ???1mm???и??????? 100mm?12.5????100mm?25???и??????????????
Q345qC??????????????????????
????????????10??25???????????и??????????1443.58?????????????2%??????????????????????????????????潵??????2?????????????У????????????????710.33????????????3%??????????????????????????????????????????????????????????????ó???????????????????????б????г?????????
??? ????Q345qC????????????????÷?Χ