E81T1-Ni1 Nickel Flux-Core Wire for Low-Temperature Service

Gas-shielded nickel flux-core wire rated for -40F impact toughness. Runs 130 to 380 amps on DCEP, rated for flat, horizontal, vertical up, overhead. Amperage chart by diameter below.

E81T1-Ni1 is a gas-shielded flux-cored wire classified under AWS A5.29 for welding low-alloy steels. The 1% nickel addition provides Charpy impact toughness at -40F (-40C), making it suitable for low-temperature service applications including offshore platforms, arctic pipelines, cryogenic storage tank supports, and structural steel in extreme cold climates. The T1 designator indicates it is a gas-shielded wire requiring 75/25 Ar/CO2 or 100% CO2 shielding gas, operating on DCEP polarity. It provides 80,000 psi tensile strength, higher than standard E71T-1, to match HSLA base metals. E81T1-Ni1 is widely used in heavy fabrication, shipbuilding, offshore structures, and pressure vessel construction where low-temperature toughness and high deposition rates are both required.

What This Means in Practice

E81T1-Ni1 contains approximately 1% nickel in the weld deposit, which dramatically improves impact toughness at sub-zero temperatures. The 81 means 80,000 psi tensile (higher than standard E71T-1), and the Ni1 designates the nickel content. This wire is for structural or pressure vessel work where the equipment operates at or is tested at temperatures down to -40F.

What Amps for E81T1-Ni1?

What Is E81T1-Ni1 Good For?

Use E81T1-Ni1 when the application requires Charpy impact toughness at -40F or colder.

Required for offshore structures, arctic service, low-temperature storage, and pressure vessels designed for sub-zero operating or testing temperatures.

Also used when the base metal is HSLA steel requiring an 80 ksi weld deposit with nickel toughness.

Where E81T1-Ni1 Falls Short

Requires external shielding gas (75/25 Ar/CO2 or 100% CO2).

More expensive than E71T-1 due to nickel content.

Not suitable for self-shielded field welding.

Produces more fume than solid wire MIG.

Requires proper storage to maintain wire quality.

Preheat and interpass temperature control is important on thicker sections.

Running E81T1-Ni1 Wire

What You Hear and See

Smooth spray arc with moderate noise. The gas-shielded design produces a more stable arc than self-shielded wires. The nickel content does not change arc behavior noticeably.

Running It

Drag at 15-25 degrees with 75/25 Ar/CO2 or 100% CO2. Travel speed is similar to E71T-1. The wire handles multi-pass structural joints in all positions.

Puddle and Slag

Well-controlled puddle with good out-of-position characteristics. The 1% nickel enhances toughness without affecting welding behavior. The slag is thin and chips off between passes.

If You Are Struggling

This is a specialty wire for low-temperature service. If you are not welding for sub-zero Charpy requirements, E71T-1 is the simpler choice. Same technique, lower cost, easier to source.

E81T1-Ni1 Size by Material Thickness

What the Spec Sheet Leaves Out

E81T1-Ni1 adds 1% nickel to the E71T-1 chemistry for Charpy impact toughness at -40F and below. Arctic pipelines, offshore platforms in cold water, LNG facilities, and cold-climate bridges call for this wire. The nickel lowers the ductile-to-brittle transition temperature, preventing fracture in extreme cold. It costs 40-50% more than E71T-1 per pound. Use it only when the specification requires sub-zero toughness.

Common Brand Names for E81T1-Ni1

You will find E81T1-Ni1 sold under 3 brand names. Lincoln Electric Outershield 81Ni1-H has the widest distribution.

Data sourced from AWS A5.29/A5.29M. Amperage ranges are approximate starting points. adjust based on position, fit-up, and material thickness. Always follow manufacturer recommendations and applicable codes.