Q235 A3 Carbon Steel Coil Strip High Strength Steel Coil 12000mm For Decoration

Carbon Steel Coil Can Be Used As Cold-Rolled Carbon Steel Strip For Decoration

Ss400 is a marking method of steel materials in Japan and a judgment standard, which is equivalent to Q235 steel (also called A3 steel) in China. Structural steels in foreign standards are often classified according to tensile strength, such as SS400 (marked as such in Japan), where 400 represents σ The minimum value of b is 400MPa. Ultra high strength steel refers to σ B ≥ 1373 Mpa steel. During the tensile process of the specimen, the material enters the strengthening stage after the yield stage. As the size of the tensile cross section shrinks significantly, the maximum force (Fb) that the specimen bears during the process before breaking is divided by the stress obtained from the original cross sectional area (So) of the specimen( σ), It is called tensile strength or strength limit( σ b) , in N/mm2 (MPa). It indicates the maximum ability of metal materials to resist damage under tensile force. When the steel yield to a certain extent, its resistance to deformation will be improved again due to the rearrangement of internal grains. At this time, although the deformation develops rapidly, it can only increase with the increase of stress until the stress reaches the maximum. Since then, the steel's resistance to deformation has decreased significantly, and a large plastic deformation occurs at the weakest point, where the specimen section shrinks rapidly, leading to necking until fracture failure. The maximum stress value of steel before tensile fracture is called strength limit or tensile strength.