← Back to Bead BoardFlux-core welding cost per inch
Flux-core (FCAW) lays down metal faster than any other hand process — which makes it the cheapest per inch on thick plate and long structural welds. This page prices FCAW welds by the inch with the calculator locked to flux-core defaults. Self-shielded wire trades some efficiency for going gasless in the wind.
Quick answer
A 1/4-inch flux-core fillet runs about $0.55 per inch ($6.54 per foot) at $85/hr — the cheapest hand process per inch on thick work. FCAW deposits fast (8lb/hr for .045, up to 14 lb/hr for 1/16"), so arc time and labor stay low. Slag cleanup is the tradeoff, and gas-shielded wire is ~86% efficient. It is the workhorse for outdoor structural and heavy plate.
Worked example: 12 inches of 1/4-inch fillet
Gas-shielded flux-core (E71T-1) is the production choice for thick plate; self-shielded (NR-211) goes gasless for windy outdoor work at a lower efficiency. Both beat MIG on deposition. The cost to watch is the extra labor for chipping and wire-wheeling slag — light on structural work, heavier when the weld has to look clean.
Questions welders keep asking
How much does flux-core welding cost per inch?
At common defaults — 8 lb/hr deposition, 86% efficiency, 30% operating factor, $85/hr, 25% markup — a 1/4-inch fillet sells for about $0.55 per inch ($6.54 per foot). That is the cheapest of the four hand processes here, because flux-core deposits the fastest. Larger wire (.052 or 1/16") deposits even faster and drops the per-inch number further on heavy plate.
Is flux-core cheaper than MIG?
Per inch on thick plate, usually yes. Flux-core .045 deposits about 8 lb/hr versus 4 lb/hr for .035 MIG, so arc time and labor are roughly halved on the same weld. Add slag cleanup time and a slightly lower efficiency and the gap narrows, but on long structural welds FCAW typically wins on total cost. On thin sheet and appearance work, MIG is cleaner and the deposition advantage disappears.
Gas-shielded vs self-shielded flux-core — which costs less?
Gas-shielded (E71T-1) is about 86% efficient but you pay for shielding gas; self-shielded (NR-211) skips the gas but runs around 78% efficient and wastes more wire. In the shop, gas-shielded usually edges out on total cost and weld quality. Outdoors in wind, self-shielded wins because it works where gas-shielded simply will not. The calculator lets you set efficiency and gas flow to compare your own case.
Welding cost by process
MIG Welding Cost Per Inch
High deposition, 95% efficient. The cheapest process per inch on production work.
TIG Welding Cost Per Inch
Slow and welder-bound, but nothing finishes like it. Price the extra hours honestly.
Stick Welding Cost
E7018 at 2.2 lb/hr, 62% efficient. Wins on short field welds and dirty stock.
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