ALLOYS
317/317L
317/317L is a molybdenum bearing austenitic chromium nickel steel similar to type 316, except the alloy content in 317/317L is somewhat higher. 317L was developed primarily to resist more effectively the attack of sulfurous acid compounds. Its proven ability to combat corrosion has widened its use considerably and is now being used for many applications.
UNS: S31700/S31703
Stock Sizes: 1/8” – 1” OD
Specifications:
- Seamless Tube: ASTM A213/A269
- NACE MR0175/MR0103
Available Processing:
- Cold Worked and Bright Annealed
Common Testing: Eddy Current, Flare, Flattening, Positive Material Identification
Chemical Composition (%)
| Chemical | Percentage |
|---|---|
| Iron (Fe) | Balance |
| Chromium (Cr) | 18-20% |
| Nickel (Ni) | 11-14% |
| Molybdenum (Mo) | 3-4% |
| Manganese (Mn) | 2% Max |
| Silicon (Si) | 1% Max |
| Copper (Cu) | – |
| Carbon (C) | 0.035% Max |
| Chemical | Percentage |
|---|---|
| Sulfur (S) | 0.030% Max |
| Phosphorus (P) | 0.045% Max |
| – | – |
| – | – |
| – | – |
| – | – |
| – | – |
| – | – |
Physical Properties
| Property | Measurement |
|---|---|
| Density (lb/in3) | 0.285 |
| Elongation (min %) | 35 |
| Minimum Yield (psi) | 30,000 |
| Minimum Tensile (psi) | 75,000 |
| Max Hardness (HRB) | 90 |