Japan SUS631 (17-7PH GB 0Cr17Ni7Al) is a dispersion hardened stainless steel, high strength and hardness, fatigue resistance, good corrosion resistance and formability, and when the temperature and very little distortion, good performance of this steel, in particular, apply aviation and aerospace, this particular alloy is also suitable for other high strength, corrosion resistance requirements of the area. At high temperature to 316 ℃, the spring performance is still good. SUS631 used in aerospace, chemical, petrochemical, paper and metal processing industry.
SUS631 chemical composition:
       Silicon (Si) ≤ 1.00
       Phosphorus (P) ≤ 0.035
       Sulfur (S) ≤ 0.030
       Chromium (Cr) 16.00 ~ 18.00
       Aluminum (Al) 0.75 ~ 1.50
       Carbon (C) ≤ 0.09
       Manganese (Mn) ≤ 1.00
       Nickel (Ni) 6.50 ~ 7.75
       Copper (Cu) ≤ 0.5