... ,C45,16Mn,65Mn,45Cr, 60S2Mn 2.good toughness Flat Steel for you flat steel bars Main MaterialQ235,Q195,Q345,C45,16Mn,65Mn,45Cr ... :NFS04-305 ApplicationMainly used to make various alloy structural parts and components, such as station boiler superheater collector, large-diameter pipe ...