Q235 and Q275 are ordinary carbon structural steel, the difference is that the carbon content is different
. Q235 carbon content 0.14-0.22%, tensile strength 375-500MPa, usually rolled into wire rod or round steel, square steel, flat steel, Angle steel, I-steel, channel steel, window frame steel and other steel, medium thick steel plate, used to make steel bars or construction of plant frames, high-voltage transmission towers, Bridges, vehicles, boilers, containers, ships and so on.
Q275 With carbon content < 0.37% and tensile strength 410-560MPa, it is used for manufacturing parts requiring high strength, such as gears, shafts, sprockets, keys, bolts, nuts, steel for agricultural machinery, conveyor chains and chain joints.