Blue Demon E71T-1/1M.035 11lb Dual Shield Flux Core Wire - General

In this review the Blue Demon E71T-1/1M.035 flux core wire is evaluated for fabricators who need a reliable, general purpose welding wire for structural and tank work. The bottom line: it is best for shops and mobile welders who want an all position wire that runs smoothly with a stable arc and produces low fumes, while still delivering the tensile strength expected for hull, storage tank and structural steel repairs.

Key Features

• All position capability: Designed for single and multipass welding in flat, horizontal, vertical and overhead positions to cover common field and shop tasks.
• Low fumes: Emits reduced welding fumes compared with many flux cored wires, improving visibility and comfort during long runs.
• Stable arc: Produces a steady arc that helps maintain travel speed and bead control on long seams.
• Good slag removal: Slag comes off cleanly, speeding post-weld cleanup on hull and tank applications.
• High minimum strength: Formulated to meet at least 70 ksi tensile strength for low-alloy and carbon steel joints.
• General purpose use: Suited to buff and fillet welding on structural steel and storage vessels where notch toughness is important.

Who It's For

The E71T-1/1M wire is aimed at welders who need a dependable, general purpose flux core for mixed field and shop work-especially those repairing hulls, storage tanks or doing structural steel fabrication where 70 ksi strength is adequate. It works well with common MIG/flux setups and handles multi-pass welds without fuss.

It is less appropriate for specialty metallurgy or where exacting, repeatable cosmetic finish is required; users seeking a premium, highly consistent wire for high-end aesthetic work or exact chemical composition control may want to consider other filler options.

Pros & Cons

Pros

• Runs smoothly and offers a stable arc that helps maintain consistent bead appearance.
• Low fume output improves conditions for longer weld sessions and confined spaces.
• Good slag removal reduces cleanup time after welding.
• Meets minimum 70 ksi tensile strength suitable for structural and tank work.

Cons

• Reported quality and weld results are mixed by users, so batch variation is possible.
• Requires shielding gas despite being flux cored, which may not suit all field setups.

Specifications

Our Verdict

The Blue Demon E71T-1/1M.035 11 lb wire is a practical choice for welders who need an all position general purpose filler with a stable arc and low fumes at a reasonable value. It is particularly good for structural repairs and storage tank work; however, buyers should inspect weld consistency on first runs since user reports indicate some variation in perceived quality.

Frequently Asked Questions

Does this wire require shielding gas?
Yes, the product requires shielding gas despite being a flux cored formulation.

What materials is it best for?
It is intended for low-alloy and carbon steel where a minimum 70 ksi tensile strength is required.

Can it be used overhead and vertical?
Yes, it is rated for all position welding including overhead and vertical applications.