E309L-16 vs ER316L: 44% composition overlap. Significantly different materials serving different application areas.
E309L-16 vs ER316L
Side-by-side chemical composition and mechanical property comparison.
Overview
E309L-16
Rutile-coated stainless steel SMAW electrode for welding dissimilar joints (stainless to carbon steel), stainless steel cladding and overlay welding. 23% Cr, 13% Ni ensures austenitic weld deposit even with dilution from carbon steel base. Low carbon (≤0.03%) for intergranular corrosion resistance. AC or DCEP. Smooth arc, easy slag removal. Used for first layer cladding on pressure vessels, repair of stainless castings and transition joints in process piping.
ER316L
Low-carbon molybdenum-bearing austenitic stainless steel welding wire — the standard filler for joining 316 and 316L stainless steels. 2-3% Mo provides superior pitting and crevice corrosion resistance versus ER308L, especially in chloride environments. Low carbon (≤0.03%) prevents sensitization. Used for TIG and MIG welding of chemical processing equipment, marine hardware, pharmaceutical vessels, pulp & paper digesters, and offshore piping. Also used for dissimilar joints between 304 and 316 grades.
| E309L-16 | ER316L | |
|---|---|---|
| Material Number | — | — |
| Category | Welding | Welding |
| Standard | AWS A5.4 | AWS A5.9 |
Chemical composition (wt%)
| Element | E309L-16 | ER316L | Overlap |
|---|---|---|---|
| C | ≤ 0.03% | ≤ 0.03% | OK |
| Si | ≤ 0.9% | 0.3–0.65% | OK |
| Mn | ≤ 2.5% | 1–2.5% | OK |
| P | — | ≤ 0.03% | — |
Mechanical properties
| Property | E309L-16 | ER316L | Unit |
|---|---|---|---|
| Tensile Strength | ≥ 550 | — | MPa |
| Yield Strength | ≥ 320 | — | MPa |
| Elongation | ≥ 30 | — | % |
Compatibility Assessment
E309L-16 and ER316L have significantly different compositions (44% overlap). These materials are not interchangeable and serve different application areas.
Automated assessment based on composition analysis
Frequently Asked Questions
Is E309L-16 the same as ER316L?
E309L-16 and ER316L have a 44% composition overlap. They are generally not directly interchangeable.
Can I replace E309L-16 with ER316L?
Generally not recommended. The compositions differ significantly (44% overlap). These materials have different alloying concepts and are intended for different applications.
What is the difference between E309L-16 and ER316L?
The main differences are in the following elements: Cr, Mo. E309L-16 is a Welding grade, while ER316L is a Welding grade.
View full data for each material:
Data provided for reference only. Always verify against the applicable specification for critical applications.
All data is for reference only. Equivalents indicate similarity, not identity. Always verify against the applicable specification for safety-critical applications. materialref.com accepts no liability for decisions based on this data.