E309L-16 vs E7018: 35% composition overlap. Significantly different materials serving different application areas.
E309L-16 vs E7018
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.
E7018
The world's most widely used low-hydrogen SMAW (stick) welding electrode. Iron powder + calcium fluoride coating produces smooth, easy-to-control arc with minimal spatter and easy slag removal. Low hydrogen designation prevents hydrogen-induced cracking in structural joints. All-position welding (1 = flat, horizontal, vertical, overhead). AC or DCEP. Minimum 480 MPa tensile strength. Must be stored in heated ovens (250-300°F) to prevent moisture pickup. Used for structural steel, bridges, buildings, pressure vessels, and all code-compliant fabrication per AWS D1.1.
| E309L-16 | E7018 | |
|---|---|---|
| Material Number | — | — |
| Category | Welding | Welding |
| Standard | AWS A5.4 | AWS A5.1 |
Chemical composition (wt%)
| Element | E309L-16 | E7018 | Overlap |
|---|---|---|---|
| C | ≤ 0.03% | ≤ 0.15% | OK |
| Si | ≤ 0.9% | ≤ 0.75% | OK |
| Mn | ≤ 2.5% | ≤ 1.6% | OK |
| P | — | ≤ 0.04% | — |
Mechanical properties
| Property | E309L-16 | E7018 | Unit |
|---|---|---|---|
| Tensile Strength | ≥ 550 | — | MPa |
| Yield Strength | ≥ 320 | — | MPa |
| Elongation | ≥ 30 | — | % |
Compatibility Assessment
E309L-16 and E7018 have significantly different compositions (35% 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 E7018?
E309L-16 and E7018 have a 35% composition overlap. They are generally not directly interchangeable.
Can I replace E309L-16 with E7018?
Generally not recommended. The compositions differ significantly (35% overlap). These materials have different alloying concepts and are intended for different applications.
What is the difference between E309L-16 and E7018?
The main differences are in the following elements: Cr, Ni. E309L-16 is a Welding grade, while E7018 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.