31 stainless steel
431 Features and Applications:
431 (16Cr-2Ni) Cr steel containing Ni can achieve high mechanical properties and better corrosion resistance than 410 and 430 steels through heat treatment. 431 stainless steel corresponds to 1Cr17Ni2 in China and JIS SUS431 in Japan.
431 Chemical composition ①:
Carbon C: ≤ 0.20
Manganese Mn: ≤ 1.00
Silicon Si: ≤ 1.00
Chromium Cr: 15.0-17.0
Nickel Ni ②: 1.25~2.50
Phosphorus P: ≤ 0.04
Sulfur S: ≤ 0.03