Q420q??????????????????
???????????????A??B??C??D4?????????4????????????????????С??235N/mm^2???????????400??520N/mm^2???????????????????????????????? ???????????????С?????????????????????????????????????????A??D??E??F4???? A32??D32??E32??F32??????????С??315N/mm^2?????????440??570N/mm^2??A??D??E??F???????????????0??-20??-40??-60?????????????????????? A36??D36??E36??F36??????????С??355N/mm^2?????????490??620N/mm^2??A??D??E??F???????????????0??-20??-40??-60?????????????????????? A40??D40??E40??F40??????????С??390N/mm^2?????????510??660N/mm^2??A??D??E??F???????????????0??-20??-40??-60??????????????????????
Q420q??????????????????
8* 2200*8000+ 32??
10* 2200*8000+ 98??
139*1684*4688+ 32??
12*2200*8000+ 98??
16*2200*8000+ 78??
???????????????лл ?? ????? ????:Q420q???????????
139*2200*8000??Q420q??????????????????