Lincoln Electric UltraCore® 71C M2 is a gas-shielded flux-cored wire (FCAW-G) classified under AWS A5.36 E71T1-C1A2-M21A2-CS1 (C25 and CO₂ dual-gas classified), engineered for high-quality all-position structural welding on mild and low-alloy steel. This listing is the 0.052" diameter, 60 lb Fiber Box (ED031819) — a larger-diameter flux-cored wire for high-deposition production welding in structural fabrication shops and shipyards.
| Product Line | Lincoln Electric UltraCore® 71C M2 |
|---|---|
| Part Number | ED031819 |
| AWS Classification | AWS A5.36 E71T1-C1A2-M21A2-CS1 |
| Wire Diameter | 0.052 in (1.3 mm) |
| Spool / Drum Weight | 60 lb Fiber Box |
| Shielding Gas Required | 100% CO₂ or 75% Ar / 25% CO₂ (C25) |
| Polarity | DCEP (DC Electrode Positive) |
| Typical Applications | Structural steel fabrication (AWS D1.1), bridge construction, shipbuilding, heavy plate fillet and groove welds in all positions, high-deposition production environments |
UltraCore 71C M2 is Lincoln Electric's premium flux-cored wire for demanding structural applications where both all-position capability and high deposition rates are required. The "C" in the designation refers to CO₂ classification compatibility; "M2" to the mixed gas (75/25 Ar/CO₂) classification — this wire is dual-classified for both gas types, giving you flexibility in shielding gas selection.
- Structural steel fabrication: Designed for AWS D1.1 structural work on mild and low-alloy steels. Excellent arc stability and easy slag removal make it suitable for multi-pass fillet and groove welds on A36, A572, and similar steels.
- Bridge and infrastructure: The AWS A5.36 classification and all-position ("1" prefix) rating qualify it for use on bridge fabrication under many DOT and AASHTO specifications. E71T1 classification supports critical structural welds.
- Shipbuilding and marine: High deposition at 0.052" reduces weld time on long seams in hull, deck, and structural member fabrication. Approved by major class societies for appropriate structural work.
- Heavy plate production: The 0.052" diameter runs at higher amperages (200–350+ A) than 0.045" wire, dramatically increasing deposition rates on heavy plate. The 60 lb fiber box reduces packaging changes in production cells.
- Out-of-position work: All-position rating (E71) allows vertical-up and overhead welding without changing wire — a significant workflow advantage over wire diameters limited to flat/horizontal use.
Choose UltraCore 71C M2 at 0.052" when your operation requires maximum deposition rate from a flux-cored wire in all positions. The 0.052" diameter step up from 0.045" delivers measurably higher deposition in the higher-amperage range, making it economically compelling for high arc-on-time structural shops.
Compare UltraCore 71C M2 to Lincoln's Outershield 71M (AWS A5.20 E71T-1C/-1M): both are T-1 all-position flux-cored wires, but UltraCore products carry the newer AWS A5.36 classification with more specific subclassifications for shielding gas and impact testing. If your code or customer specification calls out A5.36 classification, UltraCore is the appropriate choice. For the same application using the older A5.20 classification, Outershield 71M is a proven, cost-effective alternative.
For slag-free metal-cored production welding in flat/horizontal, see Metalshield MC-110. Browse the complete flux-cored lineup at our Flux-Core Welding Wire collection.
WeldingMart is an authorized Lincoln Electric distributor, ensuring every package of UltraCore wire is genuine, traceable, factory-fresh product backed by Lincoln Electric's quality guarantee and classification certifications.
- Authorized Lincoln Electric distributor: Genuine product with full mill certification traceability — essential for AWS D1.1 and bridge code compliance documentation.
- Structural welding expertise: Our staff can help you navigate A5.36 classifications, shielding gas selection, and code requirements for your specific application.
- Fast US shipping: Large-format 60 lb fiber boxes ship promptly to keep your production schedule on track.
- Full UltraCore and Outershield lineup: Compare wire options side by side at our Flux-Core Welding Wire collection.