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Product Overview
Stainless Steel 317L is a low-carbon, molybdenum-bearing austenitic stainless steel with greatly increased resistance to chemical attack as compared to the conventional chromium-nickel austenitic stainless steels such as Grade 304. In addition, Grade 317L offers higher creep, stress-to-rupture, and tensile strength at elevated temperatures than conventional stainless steels. It is a "Low Carbon" or "L" grade which provides resistance to sensitization during welding and other thermal processes. Grade 317H is also available for high-temperature applications requiring higher creep properties.
Key Advantages & Features
Enhanced Pitting Resistance
Higher Molybdenum content provides superior resistance to chloride pitting.
Chemical Stability
Excellent resistance to sulfuric, acetic, formic, citric and tartaric acids.
Superior Weldability
Low carbon content prevents intergranular corrosion after welding.
| Grade | C | Mn | Si | Cr | Ni | Mo | P | S |
|---|---|---|---|---|---|---|---|---|
| SS 317 | 0.08 max | 2.0 | 0.75 | 18-20 | 11-15 | 3-4 | 0.045 | 0.030 |
| SS 317L | 0.03 max | 2.0 | 0.75 | 18-20 | 11-15 | 3-4 | 0.045 | 0.030 |
| SS 317H | 0.04-0.10 | 2.0 | 0.75 | 18-20 | 11-15 | 3-4 | 0.045 | 0.030 |
| Property | SS 317 | SS 317L / 317H |
|---|---|---|
| Tensile Strength (MPa) min | 515 | 515 |
| Yield Strength 0.2% (MPa) min | 205 | 205 |
| Elongation (% in 50mm) min | 35% | 40% |
| Hardness (Rockwell B) max | 95 HRB | 95 HRB |
| Density (kg/m³) | 8000 | 8000 |
| Grade | UNS No | Werkstoff No. | JIS | BS |
|---|---|---|---|---|
| SS 317 | S31700 | 1.4449 | SUS 317 | 317S16 |
| SS 317L | S31703 | 1.4438 | SUS 317L | 317S12 |
| SS 317H | S31709 | - | SUS 317H | - |
Industrial Applications
Paper & Pulp
Used in digesters and bleaching plants.
Chemical Process
Equipment handling highly corrosive acids.
Chemical Tankers
Storage tanks for acidic fluid transport.
FGD Systems
Flue gas desulfurization in power plants.
Pharmaceutical
Process equipment in medical labs.
Explosives Industry
Handling highly reactive chemical compounds.