What material is SS400 steel plate? Which standard is equivalent to in China?

SS400 steel plate is the brand of Japanese steel (JIS Series). The first S is steel, the second S is structure, 400 is the lower tensile strength of 400MPa, and the overall is the ordinary structural steel with tensile strength of 400MPa.

SS400 steel plate is basically equivalent to Q235 in China (equivalent to Q235A). However, there are some differences in specific indicators. Q235 requires the content of C, Si, Mn, s, P and other elements, but SS400 only requires s and P less than 0.050. The yield point of Q235 is greater than 235 MPa, while that of SS400 is 245 MPa. SS400 steel plate (steel for general structure) means general structural steel with tensile strength greater than 400MPa. Q235 means ordinary carbon structural steel with yield point greater than 235 MPa. The standard number of SS400 is JIS g3101. The standard number of Q235 is GB / T700.

SS400 is a way of marking Japanese steel, which is actually Q235 steel in China. It's a kind of steel material. Q represents the yield of this material, and the following 235 refers to the yield value of this material, which is about 235, and will decrease with the increase of material thickness.

Due to the moderate carbon content of SS400 steel plate, good comprehensive properties, good combination of strength, plasticity and welding properties, it is widely used. SS400 steel plate is often rolled into wire rod or round steel, square steel, flat steel, angle steel, I-beam, channel steel, window frame steel and other section steel and medium thick steel plate.

SS400 steel plate is widely used in buildings and engineering structures. It is used to make steel bar or to build workshop frame, high-voltage transmission tower, bridge, vehicle, boiler, container, ship and so on. It is also widely used as mechanical parts with low performance requirements.