Corrosion Resistance: 317 stainless steel is known for its excellent corrosion resistance in highly corrosive environments, including acidic and alkaline environments. It is resistant to corrosion from chemicals, solvents, and salts.
Strength: 317 stainless steel has higher strength compared to other austenitic stainless steels such as 304 and 316. It has a minimum tensile strength of 515 MPa and a minimum yield strength of 205 MPa.
Weldability: 317 stainless steel is known for its good weldability, making it a popular choice for welding, brazing, and soldering. It can be welded using common welding techniques, such as TIG, MIG, and stick welding.
Ductility: 317 stainless steel has good ductility, which means that it can be easily formed and shaped without cracking or breaking. This property makes it ideal for applications that require complex shapes or designs.
Magnetic Properties: 317 stainless steel is non-magnetic in the annealed condition but may become slightly magnetic after cold working.
Heat Resistance: 317 stainless steel has good heat resistance up to 870°C (1600°F). It can be used in high-temperature applications such as furnace parts, heat exchangers, and exhaust systems.
The chemical composition of grade 317 stainless steel is outlined in the following table.
| Element | Content (%) |
|---|---|
| Iron, Fe | 61 |
| Chromium, Cr | 19 |
| Nickel, Ni | 13 |
| Molybdenum, Mo | 3.50 |
| Manganese, Mn | 2 |
| Silicon, Si | 1 |
| Carbon, C | 0.080 |
| Phosphorous, P | 0.045 |
| Sulfur, S | 0.030 |
The following table shows the physical properties of grade 317 stainless steel.
| Properties | Metric | Imperial |
|---|---|---|
| Density | 8 g/cm3 | 0.289 lb/in³ |
| Melting point | 1370°C | 2550°F |
The mechanical properties of annealed grade 317 stainless steel are displayed in the following table.
| Properties | Metric | Imperial |
|---|---|---|
| Tensile strength | 620 MPa | 89900 psi |
| Yield strength | 275 MPa | 39900 psi |
| Elastic modulus | 193 GPa | 27993 ksi |
| Poisson's ratio | 0.27-0.30 | 0.27-0.30 |
| Elongation at break (in 50 mm) | 45% | 45% |
| Hardness, Rockwell B | 85 | 85 |
Chemical Processing: 317 stainless steel is widely used in the chemical processing industry due to its excellent corrosion resistance in highly corrosive environments. It is used in equipment such as tanks, piping, and heat exchangers.
Pulp and Paper: 317 stainless steel is used in the pulp and paper industry for its excellent corrosion resistance in acidic environments. It is used in equipment such as digesters, evaporators, and paper machines.
Nuclear Power: 317 stainless steel is used in the nuclear power industry for its excellent corrosion resistance in highly corrosive environments. It is used in equipment such as steam generators, reactor vessels, and heat exchangers.
Food Processing: 317 stainless steel is used in the food processing industry for its corrosion resistance and non-reactivity with food. It is used in components such as conveyor systems, mixing equipment, and storage tanks.
Aerospace: 317 stainless steel is used in the aerospace industry for its high strength and corrosion resistance. It is used in components such as aircraft fittings, shafts, and fasteners.
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