The Lincoln Murex 7024 Mild Steel Stick Electrode is a iron-powder rutile heavy-coated SMAW electrode classified to AWS A5.1/A5.1M E7024. Murex 7024 is engineered for high-speed production welding of mild steel in flat and horizontal positions, offering deposition rates typically 50% greater than E7014 electrodes with smooth bead appearance and self-cleaning slag. Its AC/DC± versatility and minimal spatter make it an efficient choice for shipbuilding, structural steel fabrication, and heavy equipment manufacture where downhand or horizontal fillet welds dominate.
- Classification: AWS A5.1/A5.1M E7024
- Best for: High-deposition flat and horizontal fillet welding on mild steel in production and fabrication environments
- Polarity: AC, DC+, or DC−
- Positions: Flat and horizontal only
- Available diameters: 1/8 in, 5/32 in, 7/32 in, 1/4 in
- AWS Classification: AWS A5.1/A5.1M E7024
- Coating: Heavy iron-powder rutile (titania-iron powder) coating delivering approximately 50% higher deposition rates than E7014; produces a self-cleaning, easily removed slag
- Polarity: AC, DC reverse polarity (DCEP/electrode positive), or DC straight polarity (DCEN/electrode negative); all three polarities are acceptable, making this electrode highly versatile across AC and DC power sources
- Welding positions: Flat (1G/1F) and horizontal (2G/2F) positions only; the heavy iron-powder flux coating precludes out-of-position welding
- Typical amperage: 100–175 A (1/8 in); 160–240 A (5/32 in); 250–300 A (3/16 in); 300–350 A (7/32 in); 350–400 A (1/4 in)
- Available diameters: 1/8 in, 5/32 in, 7/32 in, 1/4 in
- Pack sizes: 50 lb Carton
| Diameter | Pack size | Manufacturer part number |
|---|---|---|
| 1/8 in | 50 lb Carton | EDM13181214 |
| 5/32 in | 50 lb Carton | EDM13181215 |
| 7/32 in | 50 lb Carton | EDM13181217 |
| 1/4 in | 50 lb Carton | EDM13181218 |
Murex 7024 is purpose-built for high-deposition flat and horizontal SMAW on mild steel:
- Structural steel fabrication — beams, columns, and plate girders
- Shipbuilding and marine structural assemblies
- Heavy equipment manufacture — excavators, cranes, and loaders
- Truck bodies, trailers, and railcar fabrication
- Barges and offshore platform decks (flat butt and fillet welds)
- Multiple-pass welds on thick mild steel plate
- Flat and horizontal fillet welds in production shop environments
- Store electrodes in a dry location; unlike low-hydrogen types, Murex 7024 does not require baking before use under normal storage conditions, but avoid exposure to high humidity.
- Set the power source to AC, DC+, or DC−; all three polarities are compatible — use your machine's available output without restriction.
- Select amperage from the published range for the diameter being used (e.g., 100–175 A for 1/8 in; 160–240 A for 5/32 in); start near the middle of the range and adjust for joint fit-up and plate thickness.
- Position the work in flat (1G/1F) or horizontal (2G/2F) orientation — do not attempt vertical or overhead welding with E7024.
- Strike the arc and drag the electrode at a steady travel speed; the heavy coating supports a drag technique, allowing the electrode to rest lightly on the joint without shorting out.
- Allow the self-cleaning slag to solidify, then peel or lightly chip it away between passes; the slag releases easily when welding parameters are correct.
- For multiple-pass welds, allow each pass to cool sufficiently and remove all slag before depositing the next bead to maintain weld quality.
Compared to E7014, Murex 7024 delivers approximately 50% higher deposition rates due to its heavier iron-powder coating, making it significantly more productive for flat and horizontal production welding — but E7014 allows all-position use where 7024 cannot. Compared to E7018 (low-hydrogen), Murex 7024 offers higher speed and no baking requirement for normal storage, but E7018 provides all-position capability, low diffusible hydrogen, and superior low-temperature toughness for critical structural and code work. For the highest deposition on flat welds with an even more aggressive iron-powder coating, E7028 (horizontal fillet only, DC+/AC) is an alternative, though 7024 retains broader polarity flexibility.
What is Lincoln Murex 7024 used for?
Murex 7024 is a high-deposition mild steel stick electrode designed for flat and horizontal fillet and butt welds in production environments such as structural steel fabrication, shipbuilding, heavy equipment manufacture, and railcar fabrication.
What polarity does E7024 run on?
E7024 runs on AC, DC+ (DCEP), or DC− (DCEN), giving you full flexibility to use it with virtually any AC or DC power source available in the shop.
Can I weld out-of-position with Murex 7024?
No — Murex 7024 is limited to flat (1G/1F) and horizontal (2G/2F) positions only. The heavy iron-powder flux produces a large molten slag pool that cannot be controlled in vertical or overhead applications.
Do I need to bake or dry Murex 7024 rods before welding?
Murex 7024 is a rutile-iron powder electrode, not a low-hydrogen type, so baking is not required under normal dry storage conditions. If electrodes have been exposed to excessive moisture, dry them at 200–250°F for 1 hour before use.
How does E7024 compare to E7018?
E7024 offers higher deposition rates and AC/DC± versatility for fast flat-and-horizontal production work, while E7018 provides all-position capability, low diffusible hydrogen, and better low-temperature toughness for structural and code-quality applications. Choose 7024 for high-speed shop work; choose 7018 for critical or code-governed welds.
Shop Lincoln Murex 7024 Mild Steel Stick Electrode at WeldingMart.com — competitive pricing, fast shipping, and the largest in-stock selection of Lincoln Electric SMAW consumables. Backed by Lincoln Electric's global manufacturing quality system certified to ISO 9001 and conformance to AWS A5.1/A5.1M, ASME SFA-5.1, and ABS standards.