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317L
Product Information
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317L is a molybdenum containing austenitic stainless steel, with improved corrosion resistance over 304/304L and 316/316L stainless steel. The increased levels of chromium, nickel and molybdenum over 316L stainless steel improve chloride pitting resistance and general corrosion. Through the controlled addition of nitrogen it is common for 317L to meet the mechanical properties of 317 straight grade, while maintaining a low carbon content.
Common Trade Names
317 Stainless, 317L Stainless
Inventory
317L Plate, 317L Coil, 317L Welding Products
Specifications
UNS S31700, ASTM A 240, ASME SA-240
Chemical Composition, %
| Ni | Cr | Mo | Mn | Si | C | N | S | P | Fe | |
|---|---|---|---|---|---|---|---|---|---|---|
| MIN | 11.0 | 18.0 | 3.0 | - | - | - | - | - | - | - |
| MAX | 15.0 | 20.0 | 4.0 | 2.0 | 0.75 | 0.03 | 0.1 | 0.03 | 0.045 | Balance |
Features
- Improved general and localized corrosion to 316/316L stainless
- Good formability
- Good weldability
Applications
- Flue gas desulfurization systems
- Chemical process vessels
- Petrochemical
- Pulp and paper
- Condensers in power generation
Physical Properties
Density: 0.285 lb/inch3
Melting Point: 2540 - 2630°F
Poisson's Ratio: 0.3
Electrical Resistivity: 475 Ohm-circ mil/ft
| Temperature, °F | 70 | 212 | 392 | 572 |
| Coefficient* of Thermal Expansion, in/in°F x 10-6 | - | 9.2 | 10.1 | 10.8 |
| Thermal Conductivity Btu • ft/ft2 • hr • °F |
7.8 | - | - | - |
| Modulus of Elasticity Dynamic, psi x 106 | 29 | - | - | - |
* 70°F to indicated temperature.
Mechanical Properties
Minimum Specified Properties, ASTM A 240
| Ultimate Tensile Strength, ksi | 75 |
| 0.2% Yield Strength, ksi | 30 |
| Elongation, % | 40 |
| Hardness MAX, Brinell | 217 |
Typical Tensile and Impact Properties
| Temperature, °F | 70 | 200 | 400 | 600 | 800 | 1000 | 1200 | 1400 |
| Ultimate Tensile Strength, ksi | 82 | 76 | 71 | 71 | 71 | 68 | 51 | 31 |
| 0.2% Yield Strength, ksi | 42 | - | - | - | 27 | 23 | 22 | - |
| Charpy Impact V-notch, ft-lbd | 65 - 100 | - | - | - | - | - | - | - |
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