317 / 317L is a molybdenum-bearing chromium-nickel austenitic stainless steel grade available in plate, sheet, and strip forms for pressure vessels and general industrial applications. It offers excellent corrosion resistance, particularly in aggressive chemical environments.
| – | UNS | WERKSTOFF NR. | EN | JIS | BS | AFNOR |
|---|---|---|---|---|---|---|
| 317 | S31700 | 1.4449 | X2CrNiMo18-15-4 | SUS317 | 317S16 | Z2CND19-15 |
| 317L | S31703 | 1.4438 | X2CrNiMo18-15-4 | SUS317L | 317S12 | Z2CND19-15 |
Molybdenum alloyed austenitic grade with higher corrosion resistance than “316L”, mostly used in the chemical processing industry.
317 and 317L can be readily formed and fabricated by a full range of cold working operations. It can be used in heading, drawing and bending. Any cold working operations will increase the strength and hardness of the material and may leave it slightly magnetic.
Common applications are Chemical tankers, Pulp and Paper equipment, Condenser tubes, heat exchanger tubes, Equipment for the petrochemical industry, Flue-gas desulfurization equipment
Final chemical, mechanical properties, dimensions and tolerances are confirmed against the governing specification and purchase order.
| Grade | Carbon % | Manganese % | Phosphorus % | Sulfur % | Silicon % | Chromium % | Nickel % | Molybdenum % |
|---|---|---|---|---|---|---|---|---|
| 317 | 0.08-0.10 | 2.00 max | 0.030 max | 0.010 max | 0.40 max | 18.00-20.00 | 11.00-15.00 | 3.00-4.00 |
| 317L | 0.03 max | 2.00 max | 0.030 max | 0.010 max | 0.40 max | 18.00-20.00 | 11.00-15.00 | 3.00-4.00 |
| - | Min | Max |
|---|---|---|
| Tensile Strength (MPa) | 515 | 690 |
| Tensile Strength (Ksi) | 75 | 100 |
| Yield Strength %0.2 (MPa) | 220 | 250 |
| Yield Strength %0.2 (Ksi) | 32 | 36 |
| Elongation % in 50mm (2") | 35 | - |
| Hardness Vickers | 155 | - |
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