420 Stainless Steel Plate Manufacturer & Supplier
420 carries 0.15% carbon minimum so it hardens to a high level — typically 50 HRC — for cutting edges, moulds and wear parts that must also resist mild corrosion.
UNS: S42000 | Category: Martensitic & Precipitation Hardening Stainless
Size Range
Outer Diameter: Thickness 3 - 60 mm · Width 1000-3000 mm · Length 2000-12000 mm
Wall Thickness: 3 - 60 mm
Chemical Composition (%)
| C | Si | Mn | P | S | Cr |
|---|---|---|---|---|---|
| 0.15 min | 1.00 max | 1.00 max | 0.040 max | 0.030 max | 12.00-14.00 |
Mechanical Properties
- Yield Strength Rp0.2
- 345 MPa min (annealed)
- Tensile Strength Rm
- 655 MPa min (annealed)
- Elongation A5
- 15% min
- Hardness
- 241 HB max annealed; up to 52 HRC hardened
- Heat treatment
- Harden 980-1035 °C, oil quench, temper 150-370 °C
Applicable Standards
- ASTM A240 / ASME SA240
- ASTM A480
- EN 10088-2
- JIS G4304 / G4305
- EN 10204 3.1 certification
Applications
- Plastic injection mould plate
- Cutting blades & knives
- Surgical and dental instruments
- Wear and guide plates
- Shafts & pump sleeves
Industries Served
- Engineering & Machining
- Medical & Surgical
- Plastics & Moulding
Equivalent Grades
- EN
- 1.4021 / X20Cr13
- JIS
- SUS 420J1
- DIN
- X20Cr13