Stainless steel brand "304" (S30400) is the brand name in American stainless steel standards (such as ASTM standards). In China's newly formulated stainless steel brand standard GB/T 20878 ― 2007, the corresponding brand is 06 Cr 19 nil 0 (the old brand is OCrl8Ni9). This brand is a typical brand of the famous 18-8 Cr-Ni austenitic stainless steel. Because of its excellent comprehensive properties and wide application, its output and consumption account for about 80% of the total austenitic stainless steel.
The main characteristics of 304(06 Cr 19 nil 0) steel are:
It has excellent corrosion resistance and intergranular corrosion resistance. It has strong corrosion resistance to oxidizing acids, such as nitric acid with a concentration of 65% or less below the boiling point temperature. It also has good corrosion resistance to alkaline solutions and most organic and inorganic acids.
It has excellent cold and hot working and forming properties. It can process and produce various products such as plates, pipes, wires, strips and profiles, and is suitable for manufacturing cold heading, deep drawing and deep drawing parts.
Good low temperature performance. Under the condition of-180℃, the strength, elongation and area shrinkage are very good. Because there is no ductile-brittle transition temperature, it is often used at low temperature. Has good welding performance. The usual welding method can be used for welding, and heat treatment is not needed before and after welding.
It is estimated that there is something wrong with your materials, and the seller is fooling you.