Electrode comparison
E316L vs ER316L
Same molybdenum-bearing chemistry for 316 base metal. E316L is the covered stick electrode; ER316L is bare wire and TIG rod.
E316L vs ER316L at a glance
| E316L | ER316L | |
|---|---|---|
| AWS specification | AWS A5.4/A5.4M | AWS A5.9/A5.9M |
| Process | Stick (SMAW) | TIG (GTAW) / MIG (GMAW) |
| Form | Covered electrode | Solid wire / rod |
| Tensile strength (min) | 70 ksi | 70 ksi |
| Yield strength (min) | 40 ksi | 40 ksi |
| Elongation (min) | 30% | 30% |
| Impact toughness | Not required; austenitic deposits remain tough at low temperature | Not required; austenitic deposits remain tough at low temperature |
| Polarity | DCEP, AC | DCEP (GMAW), DCEN (GTAW) |
| Positions | Flat, Horizontal, Vertical, Overhead | Flat, Horizontal, Vertical, Overhead |
| Penetration | Shallow to medium | Medium |
| Deposition rate | Medium | Medium to high depending on process |
| Coating / core | Lime-titania (-16) | None — bare wire or rod |
| Slag | Self-lifting, remove completely between passes | None; light oxide film to be cleaned or pickled |
| Shielding gas | None — self-shielding | 100% argon for TIG; tri-mix or 98/2 for MIG |
| Storage | Dry storage; rod oven at 250–300 °F (120–150 °C) after opening. | Clean, dry and isolated from iron contamination. |
| Primary use | Marine and offshore stainless fabrication | Marine and offshore piping and structures |
Which should you use?
Both deposit the same low-carbon 18Cr-12Ni-2.5Mo weld metal for Type 316 and 316L base metal, so the corrosion performance is equivalent. The choice is a process choice. E316L is a covered electrode — portable, wind tolerant, and slag-producing. ER316L is bare filler for TIG and MIG — no slag, much finer heat control, and the standard for sanitary tube, thin-wall pipe and any weld that will be polished, passivated or inspected.
Choose E316L when
- Field repair and heavy fabrication
- Windy or outdoor conditions
- Situations where no gas supply is available
Choose ER316L when
- Sanitary and pharmaceutical tubing
- Thin-wall pipe and sheet
- Welds requiring pickling and passivation
- Precise heat control on heat-sensitive assemblies
Amperage compared
| Diameter | E316L | ER316L |
|---|---|---|
| 3/32 in (2.4 mm) | 40–80 A | — |
| 1/8 in (3.2 mm) | 65–110 A | — |
| 5/32 in (4.0 mm) | 95–150 A | — |
| 3/16 in (4.8 mm) | 130–190 A | — |
| 0.030 in (0.8 mm) MIG | — | 50–150 A |
| 0.035 in (0.9 mm) MIG | — | 70–180 A |
| 0.045 in (1.2 mm) MIG | — | 100–250 A |
| 1/16 in (1.6 mm) TIG | — | 40–90 A |
| 3/32 in (2.4 mm) TIG | — | 70–130 A |
| 1/8 in (3.2 mm) TIG | — | 100–180 A |
Ranges are typical starting points. Diameters listed for only one electrode are shown as — for the other.
E316L vs ER316L — common questions
Do both resist chlorides equally?
Yes. Both carry 2 to 3% molybdenum, so the corrosion performance of a sound weld is equivalent.
Which is better for pipe welding?
Commonly both, in sequence: an ER316L TIG root with an argon back purge, then E316L stick or ER316L wire for fill and cap. The TIG root gives the clean inside surface that matters most.
Does the stick version need a rod oven?
E316L should be held at 250–300 °F after opening to keep the coating dry. ER316L has no coating, so its concern is contamination rather than moisture.
Full specifications
E316L
AWS A5.4/A5.4M
E316L adds 2–3% molybdenum for pitting and chloride resistance, making it the electrode for 316/316L marine, chemical and pharmaceutical work.
ER316L
AWS A5.9/A5.9M
ER316L is the molybdenum-bearing bare filler for 316 and 316L stainless — the standard TIG rod and MIG wire for marine, chemical and sanitary service.