317L
Data verified317L is the low-carbon version of 317, with 3–4% molybdenum for welded equipment in hot chloride and acid service beyond the capability of 316L. Its PREN of about 30 bridges the gap to super-austenitic grades.
Chemical composition
| Element | Content (%) |
|---|---|
| C | ≤0.030 |
| Si | ≤0.75 |
| Mn | ≤2.00 |
| P | ≤0.045 |
| S | ≤0.030 |
| Cr | 18.00–20.00 |
| Ni | 11.00–15.00 |
| Mo | 3.00–4.00 |
| N | ≤0.10 |
Weight percent, per the governing standard ranges. Actual values per heat are on the mill certificate.
Properties
| Delivery condition | Annealed |
| Hardness | ≤217 HB (annealed) |
| Tensile strength | 515–690 MPa |
| Density | 7.90 g/cm³ |
Heat treatment
Solution anneal 1010–1120 °C, rapid cool.
Equivalent grades
| Standard | Designation |
|---|---|
| din | 1.4438 |
| aisi | 317L |
| jis | SUS317L |
| gb | 022Cr19Ni13Mo3 |
Compare side by side: 317L vs 317 · 317L vs 316L
Equivalents overlap in chemistry and use but are not always identical — see our equivalents guide before substituting in certified designs.
Applications & Processing
Applications: FGD scrubbers, bleach plant washers, chemical vessels, pharmaceutical reactors, seawater-cooled exchangers.
Processing: Excellent weldability with matching or over-alloyed filler; forming and machining similar to 316L with higher forces.
Need 317L from stock?
Steel.Wiki is sponsored by Shenzhen NewAsia Special Steel (Nasteel), a special-steel stockholder in Shenzhen stocking mold, tool and alloy steels with EN 10204 3.1 certification.
Ask for a quotationVisit NasteelSource: ASTM A240 / EN 10088 published ranges · Last updated 2026-11-03. Data is indicative — verify critical values against the governing standard and mill certificate before use.