Austenitic & Super Austenitics Steels
TP 317L • 1.4438
- Application
Alloy 317 (UNS S31700) is a lowcarbon corrosion resistant austenitic chromium-nickel-molybdenum stainless steel. The high levels of these elements assure the alloy has superior chloride pitting and general corrosion resistance to the conventional 304/304L and 316/316L grades. The alloy provides improved resistance relative to 316L in strongly corrosive environments containing sulfurous media, chlorides, and other halides.
The low carbon content of Alloy 317 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 Alloy 317.
Alloy 317 is non-magnetic in the annealed condition. It cannot be hardened by heat treatment, however the material will harden due to cold working. Alloy 317 can be easily welded and processed by standard shop fabrication practices.
- Typical manufacturing specifications
ASTM A213, ASTM A269, ASTM A312, ASTM A632 Also individual customer specifications.
- Industries predominantly using this grade
Chemical and Petrochemical Processing, Power Generation, Food and Beverage Processing, Petroleum Refining etc.
Technical Data
Chemical composition(% by Weight)
Element | C | Mn | P | S | Si | Ni | Cr | Mo |
|---|---|---|---|---|---|---|---|---|
Minimum | - | - | - | - | - | 11.0 | 18.0 | 3.0 |
Maximum | 0.085 | 2.00 | 0.045 | 0.030 | 1.00 | 15.0 | 20.0 | 4.0 |
Aiming | 0.025 | 1.7 | 0.025 | 0.0039 | 0.3 | 13 | 18.2 | 3.05 |
Mechanical Properties
| Specifications(Tubing, Annealed) | Actual data | |||
|---|---|---|---|---|
Tensile Rm | 75 | ksi (min.) | 81 ~ 101 | ksi |
Tensile Rm | 515 | MPa (min.) | 560 ~ 700 | MPa |
Yield (R.p. 0.2%) | 30 | ksi (min.) | 36 ~ 50 | ksi |
Yield (R.p. 0.2%) | 205 | MPa (min.) | 250 ~ 350 | MPa |
Elongation | 34 | % (min.) | 45 ~ 55 | % |
