How to distinguish between SS400 and SUS304 two kinds of materials?

Answer:

SUS304 is 304 stainless steel. Simply speaking, SUS304 is 304 stainless steel. Stainless steel grades (JIS) representation in japan. 304 stainless steel is a brand of stainless steel produced according to the ASTM standard in the United states. 304, equivalent to China's 06Cr19Ni10 (0Cr18Ni9) stainless steel, Japan has also cited the United States as the term, called it: SUS304

Are Japanese standard material, SS400 carbon structural steel, corresponding to the national standard of Q235, and SUS304 is stainless steel, corresponding to national standard 0Cr18Ni9, these two are completely different, very good distinction.

The two kinds of steel are completely different, so they can be distinguished from the appearance. SS400 stainless steel is much lighter in appearance than SUS304.

SS400: brand of Japanese steel (JIS series). The implementation standard is JIS G3101.The first S represents steel (Steel), the second S stands for "structure" (Structure), the 400 is the lower limit tensile strength 400MPa, and the overall tensile strength is 400 MPa for the ordinary structural steel.