What is the difference between SS400 and steel SS41 material plate

SS400 and steel SS41 material plate are both structural steel grades used in the Japanese industrial standard JIS G3101. However, there are some differences between these two materials.

SS400 steel is a material grade that originated from the Japanese Industrial Standard JIS G3101 which has similar mechanical properties to ASTM A36 and EN S235JR. It is commonly used for general structural purposes such as bridges and buildings, and has a tensile strength of 400 MPa.

On the other hand, steel SS41 material plate is an older designation that was replaced by SS400 in JIS G3101 in 1995. SS41 is a low carbon steel alloy that has excellent welding properties and is commonly used in the manufacture of various machine parts.

Overall, SS400 is a more modern and widely-used material grade in Japan, while steel SS41 material plate is an older designation that is less common nowadays.