Stainless Steel 317 (UNS S31700) is a molybdenum-bearing austenitic stainless steel with greatly increased resistance to chemical attack as compared to the conventional chromium-nickel austenitic stainless steel pipe such as SS 304 and SS 316L. In addition. SS 317 offers higher creep, stress-to-rupture, and tensile strength at elevated temperatures than conventional stainless steel tubing. SS 317L is a low carbon version of SS 317 grade which provides resistance to sensitization during welding and other thermal processes.Stainless Steel 317L is non-magnetic in the annealed condition but may become slightly magnetic as a result of welding.
| Stainless Steel SS 317 / 317L | |
|---|---|
| AISI | 317 / 317L |
| UNS | S31700 / S31703 |
| Werkstoff Nr. | 1.4449 / 1.4438 |
| SS 317 | SS 317L | |
|---|---|---|
| Ni | 11 – 14 | 11 – 15 |
| Cr | 18 – 20 | 18 – 20 |
| C | 0.08 max | 0.35 max |
| Mo | 3 – 4 | 3 – 4 |
| C | 0.08 max | 0.35 max |
| Fe | Balance | |
| Mn | 2 max | 2 max |
| Si | 1 max | 1 max |
| S | 0.030 max | 0.030 max |
| P | 0.040 max | 0.040 max |
| Density | 8.0 g/cm3 |
|---|---|
| Melting Point | 1454 °C (2650 °F) |
| Tensile Strength | Psi – 75000. MPa – 515 |
| Yield Strength (0.2%Offset) | Psi – 30000. MPa – 205 |
| Elongation | 35 % |
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