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LORK is a special stainless steel manufacturer with 20 years of manufacturing experience.
309/309S (UNS S30900/S30908) austenitic stainless steel is typically used for elevated temperature applications. Its high chromium and nickel content provides comparable corrosion resistance, superior resistance to oxidation, and the retention of a larger fraction of room temperature strength than the common austenitic 304.
Because of its high chromium and low nickel content, Alloy 309 can be utilized in sulfur containing atmospheres up to 1832°F (1000°C). The alloy is not recommended for use in highly carburizing atmospheres since it exhibits only moderate resistance to carbon absorption. Alloy 309 can be utilized in slightly oxidizing, nitriding, cementing and thermal cycling applications, albeit, the maximum service temperature must be reduced.
309 can be easily welded and processed by standard shop fabrication practices.
Stainless Steel 309 Applications
Weight % (all values are maximum unless a range is otherwise indicated)
| Element | 309 |
| Cr | 22.0-24.0 |
| Ni | 12.0-15.0 |
| C | 0.2 max |
| Mn | 2.0 max |
| P | 0.045 max |
| S | 0.03 max |
| Si | 0.75 max |
alues at 68°F (20°C) (minimum values, unless specified)
| 0.2% Offset Yield Strength | Ultimate Tensile Strength | Elongationin 2" | Hardness | ||
| Psi(min) | Mpa | Psi(min) | Mpa | % | HBN (max) |
| 45,000 | 310 | 85,000 | 586 | 50 | 202 |
309 can be easily welded and processed by standard shop fabrication practices.
Heat uniformly at 1742 - 2192°F (950 - 1200°C). After hot forming a final anneal at 1832 - 2101°F (1000 - 1150°C) followed by rapid quenching is recommended.
The alloy is quite ductile and forms in a manner very similar to 316. Cold forming of pieces with long-term exposure to high temperatures is not recommended since the alloy is subject to carbide precipitation and sigma phase precipitants.
309 can be readily welded by most standard processes including TIG, PLASMA, MIG, SMAW, SAW and FCAW.
Available Sizes And Specification
| 309 stainless steel plate sizes and specifications | |
| Grade | 309 |
| Cold rolled stainless steel plate | Thickness: 0.3mm- 16.0mm, Width: 1000mm - 2000mm,Length: as requirements, Surface: 2B/BA/SB/8K/HL/1D/2D etc |
| Hot rolled stainless steel sheet | Thickness: 3.0mm - 300mm, Width: 1000mm - 3000mmLength: as requirements, Surface: No.1/pickling |
| Standard | ASTM A240/A480, ASTM B688, ASTM B463/SB463, ASTM B168/SB168, ASTM B443/SB443/B424/SB424B625/SB625 B575/SB575, JIS G4303,BS 1449, DN17441, G4305 |
| Stainless steel plate | Thickness: 8.0mm - 300mm, Width: 1000mm - 3000mmLength: as requirements, Surface: No.1/pickling |
Q1: Do you accept the trial order ?
A1: Yes,if we have the exactly size in stock.we can delivery even 1 piece/meter .
Q2: Can I have free sample before making orders?
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