Stainless steel 317L is a molybdenum containing, low carbon austenitic stainless steel. Due to its low carbon content, Stainless steel 317L also provides resistance to sensitization when welded and higher creep, stress to rupture, and tensile strength at elevated temperatures. It is non-magnetic in the annealed condition but may become slightly magnetic after welding.
| GB | ISC | CNS | JIS | KS | ASTM | UNS | ISO |
| 022Cr19Ni13Mo3 | S31703 | 317L | SUS 317L | STS 317L | 317L | S31703 | X2CrNiMo 19-14-4 |
| (00Cr19Ni13Mo3) | X2CrNiMo18-15-4 | ||||||
| DIN EN/DIN | W-Nr. | NF EN/NF | EN | Grade | GOST | SS | BS EN/BS |
| X2CrNiMo 18-15-4 | 1.4438 | Z2CND 19-15 | X2CrNiMo 18-15-4 | 1.4438 | 03Х16Н15М3 | 2367 | 317S12 |
| (X2CrNiMo 18-16) | Z3CND 19-15-04 | 317S11 |
The 317L stainless steel provides improved resistance relative to 316L in strongly corrosive environments containing sulfurous media, chlorides, and other halides.
The low carbon content of 317L stainless steel 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 317 stainless steel (UNS S31700).
317L stainless steel is non-magnetic in the annealed condition. It cannot be hardened by heat treatment, however the material will harden due to cold working. 317L stainless steel can be easily welded and processed by standard shop fabrication practices.
| Element | C | Si | Mn | P | S | Cr | Ni | Mo |
| Min | - | - | - | - | - | 18 | 11 | 3 |
| Max | 0.03 | 1 | 2 | 0.045 | 0.03 | 20 | 15 | 4 |
| Melting Point | Density | Specific Gravity | Modulus of Elasticity |
| in Tension | |||
| 2540 – 2630°F 1390 – 1440°C | 0.285 lbs / in3 7.89 g /cm3 | 7.98 | 29.0 x 106 psi 200 GPa |
| Alloy | Temper | Tensile Strength | Yield Strength | % Elongation | Notes |
| Minimum | Minimum 0.2% offset | in 2" Minimum | |||
| (psi) | (psi) | ||||
| 317 | Annealed | 75,000 | 30,000 | 40% | - |
Popular finish options include:
317L stainless steel is commonly used to handle sulfur, pulp liquor, acid dyestuffs, acetylating and nitrating mixtures, bleaching solutions, severe coal and oil, and many chemical compounds. Some other applications that use 317L stainless steel include:
Stainless steel 317L can be readily welded by most standard processes. A post weld heat treatment is not necessary
Low speeds and constant feeds will minimize this alloy’s tendency to work harden.
Tougher than 304 stainless with a long stringy chip, the use of chip breakers is recommended
Qinghe Steel is a full line supplier and processer of 317 stainless steel coil, sheet, plate, bar, and strip products. We stock many grades of stainless steel, including 300 and 400 series stainless, annealed and in various tempers and high temperature grades, for shipments worldwide. View our steel center here
Contact us today to discuss stainless steel for your project needs.
What Makes Grade 317 SS Different from 304 & 316 SS?
Grade 304, 316, and 317 stainless steel are all considered austenitic stainless steel alloys. These alloys all share some similar properties, such as high strength, corrosion resistance, and high concentrations of chromium and nickel.
What separates 316 and 317 SS from 304 SS is that these higher-numbered alloys have added molybdenum in their formulation—grade 316 has about 2-3% molybdenum, and grade 317 has more than 3% molybdenum.
This added molybdenum greatly improves the steel’s resistance to pitting from chlorides, which is why grade 316 SS is often used in the chemical processing and marine industries.
However, this added molybdenum content also influences the cost of these two alloys. Grade 317 SS is generally more expensive than grade 316 SS. 316 SS, in turn, is more expensive than grade 304 SS. The exact extra cost varies based on the market at the time.
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