Q295属于入门级低合金钢.分为A B两个等级.Q295A含碳等于小于0.16%, 锰0.80-1.50%,硅 小于等于 0.55%,磷 小于等于0.045%,硫小于等于0.045%,钒0.02-0.15% ,铌0.015-0.060%,钛0.02-0.20%.Q295 B含碳等于小...