304 is a versatile stainless steel, it is widely used to produce good overall performance requirements (corrosion resistance and formability) of equipment and parts. 304 stainless steel is one of the United States in accordance with ASTM standard grades of stainless steel produced. 304 equivalent of China's 0Cr19Ni9 (0Cr18Ni9) stainless steel. 304 19% chromium, nickel 9%. 304 is the most widely used stainless steel, heat-resistant steel, practical steel, China steel industry. For food production equipment, general chemical equipment, nuclear energy. In air or chemical corrosion resistant medium of a high-alloy steel, in order to maintain the inherent corrosion resistance of stainless steel, the steel must contain more than 12% chromium. 304 stainless steel chemical composition: Specifications C Si Mn PS Cr Ni (nickel) Mo SUS304 ≤0.08 ≤1.00 ≤2.00 ≤0.05 ≤0.03 18.00-20.00 8.25 ~ 10.50.