Marine Stainless vs Standard Stainless Stick Electrode
E316L-16 moly-bearing vs E308L-16 standard stainless. The choice depends on whether chloride corrosion is a concern.
Key Differences
| Attribute | E316L-16 | E308L-16 |
|---|---|---|
| Molybdenum Content | ~2% Mo - pitting resistance | None |
| Chloride Resistance | Excellent - resists pitting | Moderate - vulnerable to pitting |
| Cost | Higher (moly is expensive) | Lower |
| Base Metal Match | 316, 316L stainless | 304, 304L stainless |
| Weldability | Identical arc characteristics | Identical arc characteristics |
| Tensile Strength | 75,000 psi | 75,000 psi |
| Marine Suitable | Yes - designed for saltwater exposure | No - will pit in saltwater |
| Food Grade | Yes - pharmaceutical and food | Yes - if no chloride cleaning agents |
Use E316L-16 when:
Use E308L-16 when:
How E316L-16 and E308L-16 Work Together
If the weld will never see saltwater, chlorine, or acidic chemicals, save money and use E308L-16. It covers 304 and 304L applications perfectly. If there is any chloride exposure, including coastal environments, pool equipment, or chemical processing, use E316L-16. The molybdenum in 316L is what prevents pitting in chloride environments. There is no functional difference in weldability between the two rods.
Common Mistake With Marine Stainless
Using E308L-16 on 316L base metal because it was cheaper and available. The weld will be the weak point for corrosion. The moly in the base metal does not transfer to the weld. You must use 316L filler to get 316L corrosion resistance in the weld.
Where to Buy
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Data sourced from .