Characteristics
Alloy 317L (UNS S31703) is a low carbon corrosion resistant austenitic chromium-nickel-molybdenum stainless steel. The high levels of these elements assure the alloy has superior chloride pitting and general corrosion resistance to the conventional 304/304L and 316/316L grades. The alloy provides improved resistance relative to 316L in strongly corrosive environments containing sulfurous media, chlorides, and other halides.
The low carbon content of Alloy 317L enables it to be welded without intergranular corrosion resulting from chromium carbide precipitation enabling it to be used in the as-welded condition. With the addition of nitrogen as a strengthening agent, the alloy can be dual certified as Alloy 317 (UNS S31700).
Grade 317L stainless steel strip offers excellent machinability because it has high hardness which in turn means that cutting tools do not get dulled easily by the material during machining operations.
Mechanical Properties Values at 68°F (20°C) (minimum values, unless specified)
| Yield Strength 0.2% Offset |
Ultimate Tensile Strength |
Elongation in 2 in. |
Hardness | ||
| psi (min.) | (MPa) | psi (min.) | (MPa) | % (min.) | (max.) |
| 30,000 | 205 | 75,000 | 515 | 40 | 95 Rockwell B |
Physical Properties
| Specific Heat | 0.12 BTU/lb-°F (32 – 212°F) 502 J/kg-°K (0 – 100°C) |
| Modulus of Elasticity | 29.0 x 106 psi 200 GPa |
| Thermal Conductivity 68°F (20°C) | 8.1 BTU/(hr x ft x °F) 14 W/(m x K) |
| Melting Range | 2540 – 2630°F 1390 – 1440°C |
| Electrical Resistivity | 33.5 Microhm-in at 68°C 85.1 Microhm-cm at 20°C |
Mean Coefficient of Thermal Expansion
| Temperature Range | |||
| °F | °C | in/in °F | cm/cm °C |
| 68-212 | 20-100 | 8.9 x 10-6 | 16.2 x 10-6 |
Advantages
methods or TIG welding.
annealed alloy 321 in the strong oxidizing environment is slightly lower than that of the annealed alloy 347.
stainless steel coil limits their use to applications where higher working loads are not expected.
Applications
