Stainless Steel 317LM Annealed
Temper · default condition
AISI/SAE 317LM · UNS S31725
Standard stock condition for all corrosion service — maximum corrosion resistance, ductility and weldability.
Values for the Annealed condition
Other 317LM tempers and conditions
317LM is listed in 5 conditions; see the grade overview at 317LM.
Compare all 5 conditionsHide
| Condition · open for datasheet | Best for | Yield MPa | Tensile MPa | Elong. % | Hardness | Conductivity |
|---|---|---|---|---|---|---|
AnnealedDefaultThis page solution annealed (~1040–1120 °C, water quenched) plate/sheet | Standard stock condition for all corrosion service — maximum corrosion resistance, ductility and weldability. | 290 | 600 | 50 | 165 HB | — |
weld metal / HAZ, no post-weld heat treatment | Typical fabricated condition; low carbon avoids sensitisation, but use over-alloyed filler (ER317L or Ni-base 625) to offset Mo segregation. | 350 | 600 | 35 | 180 HB | 2.2 % IACS |
Cold Drawn / cold finished bar (annealed then lightly drawn) | Bar stock for shafts, fasteners and machined fittings needing better tolerance and higher yield than annealed. | 460 | 700 | 30 | 210 HB | — |
Quarter hard | Choose when structural strength must roughly double with only moderate loss of formability. | 600 | 900 | 20 | 25 HRC | — |
Half hard | Highest commonly stocked cold-worked strength level for springs, clamps and strapping; forming is limited to gentle bends. | 800 | 1,070 | 14 | 32 HRC | 2.2 % IACS |
What is 317LM Annealed?
317LM Annealed is 317LM in the Annealed temper — standard stock condition for all corrosion service — maximum corrosion resistance, ductility and weldability. 317LM Annealed has a yield strength of 290 MPa (42.1 ksi) and a tensile strength of 600 MPa (87 ksi) — weaker than 72% of stainless steel grades. Elongation at break is 50% and the elastic modulus is 200 GPa (29 Msi). 317LM Annealed has a density of 8 g/cm³ (0.289 lb/in³), heavier than 92% of stainless steel grades. It melts at 1,375°C (2,507 °F).
Advantages
- Ductile — tolerates forming and impact — 50%, better than 90% of stainless steel grades
- Forms and bends easily — 78/100, better than 90% of stainless steel grades
- Polishes to a fine finish — 80/100, better than 89% of stainless steel grades
- Readily welded — 85/100, better than 87% of stainless steel grades
- Tough — resists crack growth — 200 MPa·√m (182 ksi·√in), better than 86% of stainless steel grades
317LM Annealed properties
Typical room-temperature values for 317LM Annealed; 15 are specific to this condition. Other listed values are 317LM reference data and may not represent this condition. Bars are the position among stainless steel grades.
Physical3
317LM Annealed has a density of 8 g/cm³ (0.289 lb/in³), heavier than 92% of stainless steel grades. It melts at 1,375°C (2,507 °F).
Mechanical15
317LM Annealed has a yield strength of 290 MPa (42.1 ksi) and a tensile strength of 600 MPa (87 ksi) — weaker than 72% of stainless steel grades. Elongation at break is 50% and the elastic modulus is 200 GPa (29 Msi).
Thermal6
317LM Annealed is rated for continuous service to 800°C (1,472 °F). It conducts heat at 14.2 W/m·K (8.2 BTU/hr·ft·°F), worse than 76% of stainless steel grades. Thermal expansion is 16.5 µm/m·K (9.17 µin/in·°F).
Electrical3
317LM Annealed conducts electricity at 2.2 % IACS, worse than 61% of stainless steel grades.
Chemical & Environmental3
Corrosion resistance is very good (78/100), better than 84% of stainless steel grades.
Sustainability4
Producing a kilogram of 317LM Annealed takes about 58 MJ of energy and emits 5.2 kg of CO₂ — more than 66% of stainless steel grades. Typical recycled content is 60%.
Manufacturability7
317LM Annealed's machinability is fair (38/100, better than 63% of stainless steel grades); weldability excellent (85/100); formability very good (78/100).
Common Calculations5
Values are nominal handbook figures for design screening. Confirm any required mill or lot documentation when quoting.
Working with 317LM Annealed
Is 317LM easy to machine?
Gummy and strongly work-hardening — use rigid setups, positive-rake sharp carbide, heavy constant feed, 20–35 % lower surface speed than 304, and flood high-lubricity coolant.
Can 317LM be welded?
Readily welded by GTAW/GMAW/SMAW with no pre- or post-weld heat treatment; use ER/E317L or over-alloyed Ni-base (625/C-276) filler for full weld-metal corrosion resistance and keep interpass temperature below ~150 °C.
Can 317LM be formed, bent or molded?
Cold forms well but needs ~20–30 % more force and greater springback allowance than 304; hot work at 1150–1200 °C followed by solution anneal and water quench.
What surface finishes work on 317LM?
Pickle and passivate (nitric or nitric–HF) after hot work or welding to restore the passive film; polishes to a bright mirror finish, no anodising applicable.
317LM chemical composition (wt %)
Limits by weight percent from the governing specification, written the way the spec states them — a single maximum for impurities, a range for alloying elements, and the base element as balance. Nominal is the typical mid-range value.
| Element | Spec limit (wt %) | Nominal |
|---|---|---|
| Clow-carbon, sensitisation resistant | ≤ 0.03 | 0.02 |
| Mn | ≤ 2 | 1.5 |
| Si | ≤ 0.75 | 0.5 |
| P | ≤ 0.05 | 0.03 |
| S | ≤ 0.03 | 0 |
| Cr | 18 – 20 | 19 |
| Ni | 13.5 – 17.5 | 15 |
| Mo | 4 – 5 | 4.5 |
| N | ≤ 0.1 | 0.05 |
| Fe | balance | — |
317LM Annealed — frequently asked
What is 317LM Annealed used for?
317LM Annealed is typically used for pulp bleach plants, seawater equipment and chemical process piping. In short: higher-Mo 317L upgrade; chloride pitting resistance; weldable without PWHT.
What is the yield strength of 317LM Annealed?
317LM Annealed has a typical yield strength of 290 MPa (42.1 ksi) and a tensile strength of 600 MPa (87 ksi) — weaker than 72% of stainless steel grades. Strength varies by condition: see the 5 listed tempers.
Is 317LM Annealed easy to machine?
Not especially — machinability is rated fair (38/100, better than 63% of stainless steel grades). Gummy and strongly work-hardening — use rigid setups, positive-rake sharp carbide, heavy constant feed, 20–35 % lower surface speed than 304, and flood high-lubricity coolant.
Can 317LM Annealed be welded?
Yes — weldability is rated excellent (85/100). Readily welded by GTAW/GMAW/SMAW with no pre- or post-weld heat treatment; use ER/E317L or over-alloyed Ni-base (625/C-276) filler for full weld-metal corrosion resistance and keep interpass temperature below ~150 °C.
What surface finishes work on 317LM Annealed?
Pickle and passivate (nitric or nitric–HF) after hot work or welding to restore the passive film; polishes to a bright mirror finish, no anodising applicable.
Can 317LM Annealed be formed, bent or molded?
Cold forms well but needs ~20–30 % more force and greater springback allowance than 304; hot work at 1150–1200 °C followed by solution anneal and water quench.
What is the maximum service temperature of 317LM Annealed?
317LM Annealed is rated for continuous use to about 800°C (1,472 °F). Strength falls off well before that limit — check the elevated-temperature data for load-bearing parts.
Sources
- ASTM A240/A240M — Chromium and Chromium-Nickel Stainless Steel Plate, Sheet, and Strip — ASTM International (2023)
- ASTM A312/A312M — Seamless, Welded and Heavily Cold Worked Austenitic Stainless Steel Pipes — ASTM International (2022)
- ASTM A276/A479 — Stainless Steel Bars and Shapes — ASTM International (2022)
- ASTM A666 — Annealed or Cold-Worked Austenitic Stainless Steel Sheet, Strip, Plate and Flat Bar — ASTM International (2015)
- ASM Handbook Vol.1: Properties and Selection — Irons, Steels and High-Performance Alloys — ASM International (1990)
- ASM Handbook Vol.13B: Corrosion — Materials — ASM International (2005)
- 317L / 317LM / 317LMN austenitic stainless datasheets — Outokumpu / Sandvik / North American Stainless (2022)
- GB/T 24511 / GB/T 4237 (00Cr19Ni13Mo4 ) (2017)
Property data is compiled from published supplier and standards handbooks and normalised for comparison. Nothing on this page is a certification — request mill certs, CoC or material test reports with your order.