Stainless Steel 309 is a highly alloyed austenitic steel used for its outstanding oxidation resistance, high-temperature strength and creep resistance. The lower nickel content of SS 309 Plates improves resistance to sulfur attack at high temperatures. SS 309 Sheets are tough and ductile and can be readily fabricated and machined.
Stainless Steel 309S Sheets and Plate is the lower carbon version of grade 309 provides high forming and welding characteristics. These SS 309S Plates can easily bewelded using any resistance and fusion methods. SS UNS S30900 Sheets are recommended for applications where sensitization and subsequent corrosion by high-temperature gases or condensates during shutdown may pose a problem.
SS 309 / 309S SHEETS AND PLATES SPECIFICATIONS :
| Dimensions | : | ASTM, ASME and API |
|---|---|---|
| Standard | : | ASTM A240 / ASME SA240 |
| Width | : | 1000mm, 1219mm, 1500mm, 1800mm, 2000mm, 2500mm, 3000mm, 3500mm, |
| Thickness | : | 4mm-100mm |
| Length | : | 2000mm, 2440mm, 3000mm, 5800mm, 6000mm, |
| Form | : | Coils, Foils, Rolls, Plain Sheet, Shim Sheet, Perforated Sheet, Chequered Plate, Strip, Flats, Blank (Circle), Ring (Flange) etc. |
| Surface Finish | : | 2B, 2D, BA, NO.1, NO.4, NO.8, 8K, mirror, chequered, embossed, hairline, sand blast, Brush, etching, Hot rolled plate (HR), Cold rolled sheet (CR), SATIN (Met with Plastic Coated) etc |
| Hardness | : | Soft, Hard, Half Hard, Quarter Hard, Spring Hard etc |
EQUIVALENT GRADES FOR STAINLESS STEEL 309 / 309S SHEET & PLATE
| STANDARD | WERKSTOFF NR. | UNS | EN | AISI |
| SS 309 | 1.4828 | S30900 | X12CrNi23-13 | 309 |
| SS 309S | 1.4833 | S30908 | X12CrNi23-13 | 309S |
CHEMICAL COMPOSITION OF SS 309 / 309S SHEETS & PLATES
| Grade | C | Mn | Si | P | S | Cr | Mo | Ni | N |
| SS 309 | 0.20 max | 2 max | 1 max | 0.045 max | 0.030 max | 18.0 – 23 | – | 8.0 -14 | – |
| SS 309S | <=0.080 max | <=2.00 max | <=0.75 max | <=0.040 max | <=0.015 max | 22.00-24.00 max | – | 12.00-14.00 | – |
MECHANICAL PROPERTIES FOR SS 309 / 309S SHEETS & PLATES
| Density | Specific Heat | Modulus of Elasticity | Thermal Conductivity 212°F (100°C) | Melting Range | Electrical Resistivity |
| 0.285 lbs/in3 7.89 g/cm3 | 0.12 BTU/lb-°F (32 – 212°F) 502 J/kg-°K (0 – 100°C) | 28.5 x 106 psi 193 GPa | 9.0 BTU/hr/ft2/ft/°F 15.6 W/m-°K | 2500 – 2590°F 1480 – 1530°C | 30.7 Microhm-in at 68°C 78 Microhm-cm at 20°C |
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