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317L stainless steel is a low-carbon grade 317 stainless steel with excellent corrosion resistance, particularly in acidic and alkaline environments. It is resistant to corrosive media such as sulfuric acid and phosphoric acid. Due to its high molybdenum content and low carbon content, 317L stainless steel offers excellent resistance to chloride corrosion, making it suitable for seawater environments and media with high chloride concentrations.
The lower carbon content of 317L stainless steel makes it less susceptible to intergranular corrosion during welding, improving the corrosion resistance of welded joints. 317L stainless steel maintains excellent corrosion resistance and mechanical properties in high-temperature environments, making it suitable for high-temperature equipment. It is commonly used in chemical equipment, marine engineering, medical devices, and the pulp and paper industry.
Grade | C≤ | Mn≤ | P≤ | S≤ | Si≤ | Cr | Mo | Ni | N≤ |
317L | 0.03 | 2.0 | 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】 | 40 | 217 |
Density: 7.98 g/cm³ (0.288 lb/in³)
Melting Point: 1370 - 1400 °C (2500 - 2550 °F)
Specific Heat Capacity: 500 J/kg·K—at 20°C
Thermal Conductivity: 14.0 - 15.0 W/m·K - at 20°C
Electrical Resistivity: 0.78 - 0.82 µΩ·m - at 20°C
Coefficient of Thermal Expansion:
16.0 µm/m·°C - over 20-100°C
16.5 µm/m·°C - over 20-200°C
17.5 µm/m·°C - over 20-300°C
18.0 µm/m·°C - over 20-400°C
18.3 µm/m·°C - over 20-500°C
Modulus of Elasticity: 193 GPa—at room temperature
Magnetic Permeability: Essentially non-magnetic in the annealed state. Can become slightly magnetic due to cold work. Magnetic permeability typically remains very low, µᵣ ≈ 1.01 - 1.05. Significantly lower magnetic response than ferritic or martensitic grades.
Temperature-Dependent Properties:
| Property | Temperature °C (°F) | Value (Metric) | Value (Imperial) |
|---|---|---|---|
| Specific Heat (cₚ) | 20°C (68°F) | 500 J/kg·K | 0.12 Btu/lb·°F |
| 100°C (212°F) | 520 J/kg·K | 0.124 Btu/lb·°F | |
| 500°C (932°F) | ~580 J/kg·K | ~0.14 Btu/lb·°F | |
| Thermal Conductivity (k) | 20°C (68°F) | 14.0 - 15.0 W/m·K | 9.7 - 10.4 Btu·in/h·ft²·°F |
| 100°C (212°F) | ~15.5 W/m·K | ~10.7 Btu·in/h·ft²·°F | |
| 300°C (572°F) | ~19.0 W/m·K | ~13.2 Btu·in/h·ft²·°F | |
| 500°C (932°F) | ~22.0 W/m·K | ~15.3 Btu·in/h·ft²·°F | |
| Mean Coeff. Thermal Exp. (α) | 20-100°C (68-212°F) | 16.0 µm/m·°C | 8.9 µin/in·°F |
| 20-200°C (68-392°F) | 16.5 µm/m·°C | 9.2 µin/in·°F | |
| 20-300°C (68-572°F) | 17.5 µm/m·°C | 9.7 µin/in·°F | |
| 20-400°C (68-752°F) | 18.0 µm/m·°C | 10.0 µin/in·°F | |
| 20-500°C (68-932°F) | 18.3 µm/m·°C | 10.2 µin/in·°F | |
| Electrical Resistivity (ρ) | 20°C (68°F) | 0.78 - 0.82 µΩ·m (78-82 µΩ·cm) | 47.0 - 49.5 µΩ·in |
| 100°C (212°F) | ~0.87 µΩ·m (~87 µΩ·cm) | ~52.5 µΩ·in | |
| 500°C (932°F) | ~1.10 µΩ·m (~110 µΩ·cm) | ~66.5 µΩ·in | |
| Modulus of Elasticity (E) | 20°C (68°F) | 193 GPa | 28 x 10⁶ psi |
| 100°C (212°F) | ~189 GPa | ~27.4 x 10⁶ psi | |
| 300°C (572°F) | ~178 GPa | ~25.8 x 10⁶ psi | |
| 500°C (932°F) | ~170 GPa | ~24.6 x 10⁶ psi |
STANDARD | WERKSTOFF NR. | UNS | JIS | EN |
317L | 1.4438 | S31703 | SUS317L | X2CrNiMo18-15-4 |
| Product | Standard | Show |
| 317L Stainless Steel Pipe | ASTM A312 |  |
| 317L Stainless Steel Tube SMLS | ASTM A213, ASTM A269 |  |
| 317L Stainless Steel Tube Welded | ASTM A269, ASTM A249 |  |
| 317L Stainless Steel Sheet/Plate | ASTM A240 |  |
| 317L Stainless Steel Bars | ASTM A276, ASTM A479 |  |
| 317L Stainless Steel Forgings | ASTM A182 |  |
| 317L 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
