431 Stainless Steel Plate Manufacturer & Supplier
431 combines 16% chromium with 2% nickel for the best corrosion resistance of the martensitic family, together with high tensile strength and good toughness after hardening — a classic marine shafting grade.
UNS: S43100 | Category: Martensitic & Precipitation Hardening Stainless
Size Range
Outer Diameter: Thickness 5 - 60 mm · Width 1000-3000 mm · Length 2000-12000 mm
Wall Thickness: 5 - 60 mm
Chemical Composition (%)
| C | Si | Mn | P | S | Cr | Ni |
|---|---|---|---|---|---|---|
| 0.20 max | 1.00 max | 1.00 max | 0.040 max | 0.030 max | 15.00-17.00 | 1.25-2.50 |
Mechanical Properties
- Yield Strength Rp0.2
- 655 MPa min (hardened)
- Tensile Strength Rm
- 862 MPa min (hardened)
- Elongation A5
- 15% min
- Hardness
- Up to 45 HRC hardened
- Heat treatment
- Harden 980-1065 °C, oil quench, temper 200-370 °C
Applicable Standards
- ASTM A240 / ASME SA240
- ASTM A480
- EN 10088-2
- JIS G4304 / G4305
- EN 10204 3.1 certification
Applications
- Marine propeller shafts
- Pump and valve shafts
- Bolting and high strength fasteners
- Aircraft fittings
- Compressor components
Industries Served
- Marine & Shipbuilding
- Oil & Gas
- Engineering & Machining
- Aerospace
Equivalent Grades
- EN
- 1.4057 / X17CrNi16-2
- JIS
- SUS 431
- DIN
- X20CrNi17-2