... , Q215, Q235, Q275, Q345, 20#, 45#, Stainless steel, Seamless steel, Alloy steel.3. SURFACE:Bared, Galvanized, Oiled, Color Paint, 3PE; ... , traffic signs.(3).Construction engineering: steel structure construction, sports venue, three-dimensional garage, exhibition hall.(4).Decoration: wrought iron ... Yield strength (Mpa)Tensile strength (Mpa) Elongation%Impact work (J)2354-12>12-22≥235≥375≥23≥273454- ...