SUS347 (18Cr-9Ni-Nb) with Nb, to improve the resistance to intergranular corrosion.
SUS347 (347/S34700/0Cr18Ni11Nb) has good resistance to corrosion crystal austenitic stainless steel. In acid, alkali, salt solution have good corrosion resistance in air at 800 ℃, the following have good oxidation resistance and weldability. 347 stainless steel with excellent high-temperature stress rupture (Stress Rupture) performance and high-temperature creep resistance properties (Creep Resistance) stress mechanical properties are superior to 304 stainless steel. Widely used in aerospace, power generation, chemical, petrochemical, food, paper and other fields.
Grade C Si Mn P S Cr Ni Nb
SUS347 ≤ 0.08 ≤ 1.00 ≤ 2.00 ≤ 0.045 ≤ 0.030 17.00 ~ 19.00 9.00 ~ 13.00 10 * C
Solution-treated condition SUS347 material properties:
     Yield strength (N/mm2) tensile strength (N/mm2) Elongation EL (%) HB ≧ 205 ≧ 520 ≧ 40 ≤ 187