What wire diameter is the Lincoln E71T-12C-JH8 (UltraCore HD-12C FCAW-G Welding Wire) available in?

The Lincoln E71T-12C-JH8 (UltraCore HD-12C FCAW-G Welding Wire) is available in .045 diameter. Wire diameter selection depends on base metal thickness and travel speed requirements: .023 in suits thin sheet metal (up to 3/16 in), .030 in is versatile for 1/8–1/4 in, .035 in is the most common all-purpose diameter for 3/16–1/2 in steel, and .045 in or larger suits heavy plate and high-deposition applications.

What shielding gas or flux type does the Lincoln E71T-12C-JH8 (UltraCore HD-12C FCAW-G Welding Wire) require?

The Lincoln E71T-12C-JH8 (UltraCore HD-12C FCAW-G Welding Wire) is a flux-cored wire. Flux-core wire comes in two types: FCAW-G (gas-shielded, dual-shield) requires external shielding gas (typically 75% Ar/25% CO2 or 100% CO2) for full protection; FCAW-S (self-shielded, innershield) generates its own shielding from the flux core and requires no external gas. The AWS classification E71T-12C-JH8 indicates gas-shielded operation.

What is the deposit strength of the Lincoln E71T-12C-JH8 (UltraCore HD-12C FCAW-G Welding Wire)?

For E71T-12C-JH8: Deposit tensile strength for mild steel solid MIG wire (ER70S-x) is approximately 70,000 PSI (483 MPa) minimum. For stainless filler metals, the deposit strength matches the base alloy grade. For flux-core wires, strength and chemistry vary by classification — refer to the AWS classification on the package for the exact mechanical property requirements.

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Lincoln E71T-12C-JH8 (UltraCore HD-12C FCAW-G Welding Wire)

Q: How should I store the Lincoln E71T-12C-JH8 (UltraCore HD-12C FCAW-G Welding Wire) to prevent weld quality issues?

Store MIG wire in a clean, dry location away from humidity. Moisture absorption causes porosity in the weld — mild steel wire is particularly susceptible. If wire has been exposed to moisture, it may show surface rust; lightly rusted wire can sometimes be used but should be wiped before feeding. Flux-core and low-hydrogen electrodes require stricter moisture control than solid wire. Keep spools in their original packaging or sealed containers with desiccant packets when not in use.

SKU: ED034274

$147.71 ~~$181.17~~

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AWS / Classification: E71T-12C-JH8, E71T1-C1A4-CS2-H8

Overview

Lincoln UltraCore HD-12C 0.0045 welding wire mild steel, gas-shielded flux-cored wire designed to provide the high deposition rates and low temperature impact toughness required in many heavy fabrication applications.

Features

High Deposition Rates – increase weld deposition up to 14 lbs/hr out-of-position
Flat Bead Appearance – fast freezing slag for a flat bead shape and increased productivity in all positions
Wide Operating Range – operators can set the machine on a single setting and weld in all positions
Little or No Pre-Weld Clean up Required – weld over light rust, mill scale and primer
Low Temperature Impact Toughness – capable of exceeding 27 J (20 ft·lbf) at -40°C (-40°F)
Select packaging and diameter are available meeting Buy America & American Iron & Steel (AIS) standards.

Typical Applications

Heavy fabrication
Mining
General fabrication
Structural
Applications requiring PWHT of mild steels

Welding Positions

Shielding Gas

100% CO2

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Product Overview

Features

High Deposition Rates – increase weld deposition up to 14 lbs/hr out-of-position
Flat Bead Appearance – fast freezing slag for a flat bead shape and increased productivity in all positions
Wide Operating Range – operators can set the machine on a single setting and weld in all positions
Little or No Pre-Weld Clean up Required – weld over light rust, mill scale and primer
Low Temperature Impact Toughness – capable of exceeding 27 J (20 ft·lbf) at -40°C (-40°F)
Select packaging and diameter are available meeting Buy America & American Iron & Steel (AIS) standards.