304 is an austenitic stainless steel (also chromium-nickel stainless steel). 304 is called 18/8 stainless steel in the industry, with a Cr content of 18% and a Ni content of 8%. It is non-magnetic or weakly magnetic (it is impossible to choose stainless steel to judge whether it is magnetic or not). 304 has a wide range of uses including aircraft industry, dairy products and food processing industries.

Performance: tensile strength σb (MPa) ≥ 520; yield strength σ0.2 (MPa) ≥ 205; elongation δ 5 (%) ≥ 40 reduction of area ψ (%) ≥ 50; hardness ≤ 200HV; 304 stainless steel is used It is a kind of chromium-nickel stainless steel, which has the advantages of excellent rust resistance and good resistance to intergranular corrosion, excellent cold and hot processing and forming properties, good low temperature performance, and good welding performance.