Stainless Steel E309L-17
Grade
UNS W30913 · ASTM A5.4 · GB E309L-16
E309L-17 = silica-titania (acid-rutile) coating, AC or DCEP
Choose for the flattest, best-wetting bead appearance and fast travel on sheet and cladding; slightly stiffer, less fluid than -16 in vertical-up.
Values for the E309L-17 condition
Other E309L tempers and conditions
E309L is listed in 5 conditions; see the grade overview at E309L.
Compare all 5 conditionsHide
| Condition · open for datasheet | Best for | Yield MPa | Tensile MPa | Elong. % | Hardness | Conductivity |
|---|---|---|---|---|---|---|
High-deposition basic coating, DCEP, flat/horizontal positions | Heavy-coated high-recovery electrode for productive downhand overlay of carbon steel; not for all-position work. | 395 | 560 | 36 | 190 HB | 2.2 % IACS |
E309L-16Default Titania (rutile) lime-titania coating, AC or DCEP, all-position | Default stocked electrode: smooth arc and easy slag release on AC or DC+, used for most dissimilar and overlay work. | 400 | 570 | 38 | 190 HB | 2.2 % IACS |
E309L-17This page Silica-titania (acid-rutile) coating, AC or DCEP | Choose for the flattest, best-wetting bead appearance and fast travel on sheet and cladding; slightly stiffer, less fluid than -16 in vertical-up. | 400 | 575 | 36 | 192 HB | 2.2 % IACS |
High-deposition titania coating, AC or DCEP, flat/horizontal positions | AC-capable high-recovery version for large-area stainless buttering/cladding where deposition rate governs. | 400 | 570 | 35 | 192 HB | 2.2 % IACS |
Basic (lime) coating, DCEP only | Pick when the lowest hydrogen/oxygen deposit and best ductility-toughness are needed, e.g. restrained dissimilar joints and root passes. | 405 | 560 | 40 | 183 HB | 2.2 % IACS |
What is E309L-17?
E309L-17 is E309L in the E309L-17 grade — choose for the flattest, best-wetting bead appearance and fast travel on sheet and cladding; slightly stiffer, less fluid than -16 in vertical-up. E309L-17 has a yield strength of 400 MPa (58 ksi) and a tensile strength of 575 MPa (83.4 ksi) — stronger than 57% of stainless steel grades. Elongation at break is 36% and the elastic modulus is 195 GPa (28.3 Msi). E309L-17 has a density of 7.9 g/cm³ (0.285 lb/in³), heavier than 68% of stainless steel grades. It melts at 1,400°C (2,552 °F). E309L-16 is the default condition FabDigit quotes; E309L-17 is available on request or by drawing note.
Advantages
- Readily welded — 90/100, better than 95% of stainless steel grades
Limitations
- Hard to polish — 55/100, worse than 89% of stainless steel grades
E309L-17 properties
Typical room-temperature values for E309L-17; 21 are specific to this condition. Other listed values are E309L reference data and may not represent this condition. Bars are the position among stainless steel grades.
Physical3
E309L-17 has a density of 7.9 g/cm³ (0.285 lb/in³), heavier than 68% of stainless steel grades. It melts at 1,400°C (2,552 °F).
Mechanical16
E309L-17 has a yield strength of 400 MPa (58 ksi) and a tensile strength of 575 MPa (83.4 ksi) — stronger than 57% of stainless steel grades. Elongation at break is 36% and the elastic modulus is 195 GPa (28.3 Msi).
Thermal6
E309L-17 is rated for continuous service to 800°C (1,472 °F). It conducts heat at 15 W/m·K (8.67 BTU/hr·ft·°F), worse than 59% of stainless steel grades. Thermal expansion is 15 µm/m·K (8.33 µin/in·°F).
Electrical3
E309L-17 conducts electricity at 2.2 % IACS, worse than 61% of stainless steel grades.
Chemical & Environmental3
Corrosion resistance is good (67/100), better than 61% of stainless steel grades.
Sustainability4
Producing a kilogram of E309L-17 takes about 60 MJ of energy and emits 5.2 kg of CO₂ — more than 70% of stainless steel grades. Typical recycled content is 60%.
Manufacturability6
E309L-17's machinability is fair (40/100, better than 72% of stainless steel grades); weldability excellent (90/100).
Values are nominal handbook figures for design screening. Confirm any required mill or lot documentation when quoting.
Working with E309L-17
Is E309L easy to machine?
As-welded deposit machines like 309/304 — gummy and work-hardening; use sharp carbide, positive rake, heavy feed and flood coolant, and expect ~40 % of 1212 speeds.
Can E309L be welded?
Deposit at moderate heat input with stringer beads, interpass ≤150 °C, no preheat needed on stainless; redry electrodes (≈250–300 °C) and keep dilution low so ferrite stays ~10 FN when welding onto carbon steel.
Can E309L be formed, bent or molded?
Not a wrought product — the electrode core wire is drawn and extrusion-coated; deposits are cold-formable only as weld-overlay clad plate with generous bend radii.
What surface finishes work on E309L?
Grind or pickle-and-passivate (ASTM A380/A967) to remove slag, heat tint and iron pickup; magnetic ferrite makes the bead slightly darker after polishing than 308L.
E309L 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 grade | ≤ 0.04 | 0.03 |
| Cr | 22 – 25 | 23.5 |
| Ni | 12 – 14 | 13 |
| Mn | 0.5 – 2.5 | 1.5 |
| Sihigher end typical for -17/-26 coatings | ≤ 0.9 | 0.6 |
| Moresidual only | ≤ 0.75 | 0.1 |
| Curesidual only | ≤ 0.75 | 0.1 |
| P | ≤ 0.04 | 0.02 |
| S | ≤ 0.03 | 0.01 |
| Febalance; undiluted deposit ferrite typically 10–20 FN | balance | — |
E309L-17 — frequently asked
What is E309L-17 used for?
E309L-17 is typically used for dissimilar metal welding, stainless cladding/overlay and buffer layers before stainless weld overlay. In short: low-carbon dissimilar-joint filler; standard cladding electrode; tolerant of carbon-steel dilution.
What is the yield strength of E309L-17?
E309L-17 has a typical yield strength of 400 MPa (58 ksi) and a tensile strength of 575 MPa (83.4 ksi) — stronger than 57% of stainless steel grades. Strength varies by condition: see the 5 listed tempers.
Is E309L-17 easy to machine?
Not especially — machinability is rated fair (40/100, better than 72% of stainless steel grades). As-welded deposit machines like 309/304 — gummy and work-hardening; use sharp carbide, positive rake, heavy feed and flood coolant, and expect ~40 % of 1212 speeds.
Can E309L-17 be welded?
Yes — weldability is rated excellent (90/100). Deposit at moderate heat input with stringer beads, interpass ≤150 °C, no preheat needed on stainless; redry electrodes (≈250–300 °C) and keep dilution low so ferrite stays ~10 FN when welding onto carbon steel.
What surface finishes work on E309L-17?
Grind or pickle-and-passivate (ASTM A380/A967) to remove slag, heat tint and iron pickup; magnetic ferrite makes the bead slightly darker after polishing than 308L.
Can E309L-17 be formed, bent or molded?
Not a wrought product — the electrode core wire is drawn and extrusion-coated; deposits are cold-formable only as weld-overlay clad plate with generous bend radii.
What is the maximum service temperature of E309L-17?
E309L-17 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
- AWS A5.4/A5.4M — Specification for Stainless Steel Electrodes for Shielded Metal Arc Welding — American Welding Society (2012)
- ASM Handbook Vol.6 — Welding, Brazing and Soldering — ASM International (1993)
- 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)
- Stainless SMAW electrode all-weld-metal data (E309L-15/-16/-17) — Böhler Welding / Lincoln Electric / ESAB (2023)
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.