Main components: carbon (C)≤0.02, manganese (Mn)≤2.00, nickel (Ni) 23.0~28.0, silicon (Si)≤1.0 phosphorus (P)≤0.045, sulfur (S)≤0.035, chromium (Cr) 19.0 ~23.0, copper (Cu) 1.0~2.0, molybdenum (Mo) 4.0~5.0

Physical properties: 904L Stainless Steel Coil for sale Density: 8.24g/cm3, Melting point: 1300-1390 ℃, Magnetism: None

Heat treatment: heat preservation between 1100-1150℃ for 1-2 hours, rapid air cooling or water cooling.

Mechanical properties: tensile strength: σb≥490Mpa, yield strength σb≥215Mpa: elongation: δ≥35%, hardness: 70-90 (HRB)

Corrosion resistance and main use environment: 904L is a kind of austenitic stainless steel with low carbon content and high alloying designed for harsh corrosive conditions. It has better corrosion resistance than 316L and 317L, and takes into account at the same time In addition to the price and performance, the cost performance is higher. With the addition of 1.5% copper, it has excellent corrosion resistance to reducing acids such as sulfuric acid and phosphoric acid. It also has excellent corrosion resistance to stress corrosion, pitting corrosion and crevice corrosion caused by chloride ions, and has good resistance to intergranular corrosion. In pure sulfuric acid in the concentration range of 0-98%, the operating temperature of 904L can be as high as 40 degrees Celsius. In pure phosphoric acid in the concentration range of 0-85%, its corrosion resistance is very good. In the industrial phosphoric acid produced by the wet process, impurities have a strong influence on the corrosion resistance. Among all kinds of phosphoric acid, 904L has better corrosion resistance than ordinary stainless steel. Among the strong oxidizing nitric acid, 904L has lower corrosion resistance than high-alloyed steel without molybdenum. In hydrochloric acid, the use of 904L is limited to a lower concentration of 1-2%. In this concentration range. The corrosion resistance of 904L is better than that of conventional stainless steel. 904L Stainless Steel Coil has high resistance to pitting corrosion. It is resistant to crevice corrosion in chloride solution. The force is also very good. The high nickel content of 904L reduces the corrosion rate at the pits and crevices. Ordinary austenitic stainless steel may be sensitive to stress corrosion in a chloride-rich environment when the temperature is higher than 60 degrees Celsius. By increasing the nickel content of stainless steel, this sensitization can be reduced. Due to the high nickel content, 904L has high resistance to stress corrosion cracking in chloride solutions, concentrated hydroxide solutions and hydrogen sulfide-rich environments.

Matching welding materials and welding technology: 904L welding uses ER385 welding wire and E385 welding rod, welding material size is Φ1.6, 2.4, 2.5, 3.2, 4.0, origin: Austria G&G, Sweden AVESTA and Italy TFA, welding technology and instruction book Welcome to call to obtain.