309S Stainless Steel Plate Manufacturer & Supplier
309S carries 22-24% chromium and 12-15% nickel for scaling resistance to about 980 °C. It is used both as a heat resistant grade in its own right and as the transition layer when welding stainless to carbon steel.
UNS: S30908 | Category: Austenitic Stainless Steel
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 | Ni |
|---|---|---|---|---|---|---|
| 0.08 max | 1.00 max | 2.00 max | 0.045 max | 0.030 max | 22.00-24.00 | 12.00-15.00 |
Mechanical Properties
- Yield Strength Rp0.2
- 205 MPa min
- Tensile Strength Rm
- 515 MPa min
- Elongation A5
- 40% min
- Hardness
- 217 HB max
- Max Service Temperature
- 980 °C intermittent / 1000 °C continuous
Applicable Standards
- ASTM A240 / ASME SA240 (plate, sheet, strip)
- ASTM A480 (general requirements)
- EN 10088-2 (corrosion resisting sheet & plate)
- EN 10028-7 (pressure purposes)
- JIS G4304 / G4305
- EN 10204 3.1 certification
Applications
- Furnace linings & muffles
- Kiln & annealing box components
- Heat treatment fixtures
- Dissimilar metal weld transition plate
- Boiler baffles
Industries Served
- Power & Energy
- Cement & Minerals
- Chemical & Petrochemical
Equivalent Grades
- EN
- 1.4833 / X12CrNi23-13
- JIS
- SUH 309
- DIN
- X15CrNiSi20-12