F51 stainless steel is developed based on SAF2205 in Sweden and is currently the most commonly used type of bi-directional steel in the world. It has resistance to environments containing curing hydrogen, carbon dioxide, and chloride, and can be formed through cold and hot processing. It has good welding performance and is suitable as a structural material, replacing 304 and 316.
1、 Corresponding grade of F51 stainless steel:
1. National standard GB-T: Digital grade: S22253, new grade: 022Cr22Ni5Mo3N, old grade: 00Cr22Ni5Mo3N;
2. American standard: ASTMA standard: S31803, SAE standard: 1, UNS standard: F51;
3. Japanese JIS standard: 329J3L, dp8;
4. German DIN standard: 1.4462.5, European EN standard: X2CrNiMo22-5-3, X2CrNiMoN22-5-3.
2、 Chemical composition of F51 stainless steel:
⑴ Carbon C: ≤ 0.030
⑵ Silicon Si: ≤ 1.00
⑶ Manganese Mn: ≤ 2.00
Phosphorus P: ≤ 0.030
⑸ Sulfur S: ≤ 0.020
⑹ Chromium Cr: 21.00-23.00
⑺ Nickel Ni: 4.50-6.50
Molybdenum Mo: 2.50~3.50
Nitrogen N: 0.08~0.20
(10) Copper: -
⑾ Other elements
F51/2205/S31803/1.4462 stainless steel bolts are used in the production of oil well pipes, chemical storage tanks, heat exchangers, condenser coolers, and other pressure equipment that are prone to pitting corrosion and stress corrosion.
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