 |
317 stainless steel is a high-performance alloy classified as austenitic. Due to its high content of nickel, chromium, and molybdenum, the alloy offers high corrosion resistance. Its chemical composition contributes to its superior resistance to stress corrosion compared to other stainless steels. 317 grade stainless steel is used in environments exposed to harsh chemicals and high temperatures.
317 stainless steel offers high strength and durability, making it suitable for use in chemical processing and marine equipment. 317 stainless steel belongs to the austenitic family, characterized by its face-centered cubic (FCC) crystal structure, imparting excellent toughness, ductility, and ease of fabrication even at cryogenic temperatures.
The chromium content provides the metal with its anti-corrosive properties, while the molybdenum further strengthens the alloy’s ability to resist corrosion in certain environments. The nickel content adds further strength and corrosion resistance while ensuring that the metal remains ductile even at cryogenic temperatures.
Grade | C≤ | Mn≤ | P≤ | S≤ | Si≤ | Cr | Mo | Ni | N≤ |
317 | 0.08 | 2 | 0.045 | 0.03 | 0.75 | 18.0-20.0 | 3.0-4.0 | 11.0-15.0 | 0.1 |
Tensile, min, ksi[MPa] | Yield, min, ksi[MPa] | Elongation, %(min) | Hardness, HB（max） |
75【515】 | 30【205】 | 35 | 217 |
| Property | Value | Conditions / Notes |
|---|---|---|
| Density | 7.98 g/cm³ (0.288 lb/in³) | At room temperature (20°C/68°F) |
| Melting Range | 1,370–1,420°C (2,500–2,590°F) | Typical for austenitic SS |
| Specific Heat Capacity | 500 J/kg·K (0.12 BTU/lb·°F) | At 20°C (68°F) |
| Thermal Conductivity | 15.0 W/m·K (8.7 BTU·in/hr·ft²·°F) | At 100°C (212°F) |
| Electrical Resistivity | 0.74 μΩ·m | At 20°C (68°F) |
| Temperature (°C) | Thermal Conductivity (W/m·K) |
|---|---|
| 100 | 15.0 |
| 300 | 18.5 |
| 500 | 21.0 |
| 800 | 26.0 |
Electrical and Magnetic Properties
| Property | Value |
|---|---|
| Electrical Resistivity | 0.74 μΩ·m (20°C) |
| Relative Permeability | 1.00–1.02 (Annealed) |
| Up to 1.10 (Cold-worked) | |
| Curie Temperature | Not applicable |
Structural and Elastic Properties
| Property | Value | Conditions |
|---|---|---|
| Elastic Modulus (Young's Modulus) | 193 GPa (28 x 10⁶ psi) | At 20°C (68°F) |
| 179 GPa (26 x 10⁶ psi) | At 300°C (572°F) | |
| 166 GPa (24 x 10⁶ psi) | At 500°C (932°F) | |
| Shear Modulus | 77 GPa (11.2 x 10⁶ psi) | Estimated |
| Poisson's Ratio | 0.28–0.30 | Typical for austenitic SS |
| Crystal Structure | Face-Centered Cubic (FCC) | Austenitic, stable from cryogenic to high temps |
STANDARD | WERKSTOFF NR. | UNS | JIS |
317 | 1.4449 | S31700 | SUS317 |
| Products | Standards | Show |
| 317 Stainless Steel Pipe | ASTM A312 |  |
| 317 Stainless Steel Tube | ASTM A269, ASTM A249, ASTM A213 |  |
| 317 Stainless Steel Sheet/Plate | ASTM A240 |  |
| 317 Stainless Steel Bars | ASTM A276, ASTM A479 |  |
| 317 Stainless Steel Forgings | ASTM A182 |  |
| 317 Stainless Steel Fittings | ASTM A403 |  |
Paper and pulp handling equipment.
Chemical and petrochemical processing equipment.
Condensers in fossil and nuclear fueled power generation stations.
Food processing equipment.
Textile equipment.
