SS 317L stainless steel has medium density, high thermal conductivity, low linear expansion coefficient, and excellent thermal conductivity. ASTM A240 UNS S31703 stainless steel plate is a high-strength, high-corrosion-resistant stainless steel plate. Contact us to get free quote and sample!
Physical Properties of ASTM A240 SS 317L Stainless Steel Plate
Density: 7.89 g/cm³
Melting point: 1370-1400 °C
Coefficient of thermal expansion: 16.0 μm/m°C (in the range of 20-100°C)
Thermal conductivity: 14.6 W/m·K (at 20°C)
Resistivity: 0.074 × 10⁻⁶ Ω·m (at 20°C)
Young's modulus: 193 GPa
Technical Overview & Key Specifications
| Specification | Standard / Grade Details |
| Standard Specification | ASTM A240 / ASME SA240 |
| UNS Designation | UNS S31703 |
| EN / DIN Equivalent | EN 1.4438 / X2CrNiMo18-15-4 |
| Delivery Condition | Solution Annealed & Pickled (HRAP), 2B, No. 1 Finish |
| Thickness Range | 0.3 mm – 100 mm (Custom cutting available) |
| Country / Standard | Grade Designation |
| USA / ASTM / ASME | ASTM A240 / ASME SA240 Grade 317L |
| UNS Number | UNS S31703 |
| EN / DIN (Europe/Germany) | EN 1.4438 / X2CrNiMo18-15-4 |
| JIS (Japan) | JIS G4304 SUS 317L |
| AFNOR (France) | Z2 CND 19-15 |
| BS (UK) | 317S12 |
Key Industrial Applications
Due to its high molybdenum content and low carbon composition, ASTM A240 UNS S31703 stainless steel plate prevents intergranular corrosion during welding and excels in challenging industrial environments:
Chemical & Petrochemical Processing: Used in reactors, heat exchangers, distillation columns, and piping manifolds handling organic/inorganic acids.
Pulp & Paper Industry: Flue gas desulfurization (FGD) scrubbers, digesters, bleaching equipment, and stock preparation units exposed to chlorine dioxide.
Pharmaceutical & Food Processing: High-purity tanks, process piping spools, and sanitary storage vessels.
Marine & Offshore Engineering: Seawater cooling systems, heat exchangers, and coastal infrastructure exposed to harsh marine atmospheres.
Grade Comparison Matrix for Buyers
| Grade / Alloy | UNS | % Molybdenum (Mo) | Typical PREN | Primary Corrosion Benefit |
| SS 304L | S30403 | 0% | ~18 - 20 | General atmospheric & mild organic acids |
| SS 316L | S31603 | 2.0% - 3.0% | ~23 - 25 | Marine environments & mild chlorides |
| ASTM A240 317L | S31703 | 3.0% - 4.0% | ~29 - 31 | Sulfuric/phosphoric acids, FGD scrubbers, high-chloride media |
| 2205 Duplex | S32205 | 3.0% - 3.5% | ~34 - 36 | High mechanical strength + stress corrosion cracking (SCC) resistance |
Why Source ASTM A240 317L Plates from HT Pipe?
Complete Product Range: Plates, sheets, coils, cut-to-length blanks, and matching ASTM A312 TP317L seamless/welded pipes and fittings.
Processing Services: Plasma cutting, laser cutting, waterjet cutting, beveling, and surface polishing (2B, No. 4, HL).
Quality Assurance: 100% PMI testing, ultrasonic examination (UT), positive material identification, and EN 10204 3.1/3.2 certification.
FAQ
What is the difference between 316L and 317L stainless steel plates?
Answer: The primary difference lies in the molybdenum and chromium content. 317L contains 3.0%–4.0% Molybdenum and 18.0%–20.0% Chromium, whereas 316L contains 2.0%–3.0% Molybdenum. This higher alloy content gives 317L significantly better pitting resistance and superior performance in severe chemical, flue gas desulfurization (FGD), and paper pulp applications.
Is ASTM A240 317L suitable for high-temperature service?
Answer: Yes. 317L exhibits higher elevated-temperature creep strength, stress-to-rupture performance, and tensile strength compared to conventional austenitic stainless steels like 304 and 316L.
What dimensional tolerances and plate finishes are available from HT Pipe?
Answer: HT Pipe supplies ASTM A240 317L plates in thicknesses from 3mm to 100mm, widths up to 2500mm, and lengths up to 12000mm. Standard surface finishes include Hot Rolled Annealed & Pickled (HRAP / No. 1 Finish), 2B Finish, and custom polished options (No. 4 / Hairline). Full plasma, laser, and waterjet custom cutting are available upon request.
