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

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