431 Stainless Steel
WLD Steel is a leading manufacturer, supplier and exporter of the stainless steel 431 available in a number of different sizes and forms including bar, rod, sheet and plates. Stainless steel 431 is a type of high Chromium, low Nickel Martensitic stainless steel. It’s characterized by high hardenability and good corrosion resistance to organic materials, nitric acid and petroleum products. The hardness of 431 can be up to approximately 40HRC by hardened & tempered, that’s depending on carbon content and section size. 431 stainless steel has been used for aircraft components, pump and valve parts, bolts and nuts, fasteners, studs etc.
What are the 431 available forms and specifications at WLD Steel?
- Sheet/Plate/Coil:ASTM A240, ASTM A480
- Round Bar:ASTM A276, ASTM A479
431 Equivalent Grades
| standard | SAE | UNS | JIS | DIN | EN | GB |
| 431 | 51440A | S43100 | SUS431 | 1.4057 | X22CrNi17 | 1Cr17Ni2C |
431 Chemical Composition
| C | Si | Man | Ni | Cr | P | S |
| 0.12-0.20 | 1.00 | 1.00 | 1.25-3.00 | 15.00-18.00 | 0.04 | 0.03 |
431 Mechanical Properties
| Grades | Tensile Strength (Mpa) | 0.2% Offset Yield Strength (Mpa) | Elongation, % in 2″ (51 mm) | Hardness，HB |
| 431 | 850 – 1000 | 665 min | 12 min | 248 – 302 |
