According to Material Grades, SS400 steel is defined in JIS G 3101 standard, which is a Japanese material standard for general structural usage, sheets, strips and rolled steel plates. They are also supplied as bars, flats and sections and excel in machinability and weldability.
The melting point of SS400 steel is 1430 degrees Celsius. The DN equivalent for JIS SS400 is 17100 St 44-2; the ASTM equivalents are ASTM A36 and ASTM A283 Grade D; and the EN equivalents are EN S275 and BS 43A. Material Grades states that SS400 steel has a more reliable tensile strength than SS330 steel. The thickness of SS400 steel is between 6 and 20 millimeters.