FCAW · Carbon steel
E71T-8
A self-shielded flux cored wire that needs no gas bottle, combining all position capability with the low temperature impact toughness structural codes ask for.
What the designation means
Point at any character to see what it claims. The classification is a sentence written in fields, not a product name.
- EElectrode carrying the welding current.
- 770,000 psi minimum tensile strength of the deposit.
- 1All position capability.
- TTubular flux cored construction.
- -8The usability class: a self-shielded, fast freezing flux run on direct current electrode negative, with notch toughness requirements suited to structural work.
At a glance
- Process
- FCAW
- Family
- Carbon steel
- Positions
- All positions
- Polarity
- DCEN
- Shielding
- None required; the flux core generates its own shielding as it burns
- Minimum tensile
- 70ksi
Typical uses
- Field erection of structural steel in wind
- Bridge and building connections requiring notch toughness
- Outdoor repair welding where shielding gas would be blown away
How it runs
- Self shielding, so it tolerates wind that would ruin a gas shielded weld
- Fast freezing slag that supports vertical up and overhead beads
- Good low temperature impact toughness in the deposit
- Produces more smoke and fume than gas shielded wires, so extraction matters
Storage and handling
Keep spools in sealed packaging with desiccant; a self-shielded flux that has absorbed moisture puts hydrogen straight into the weld.
Compare with
FCAWE71T-11A general purpose gasless wire with a smooth spray-type arc, common on small machines and light fabrication where no impact toughness requirement applies.FCAWE71T-1The dominant gas shielded flux cored wire for structural work, giving high deposition with a fast freezing slag that holds the puddle for vertical up welding.FCAWE71T-GSThe gasless wire that ships with small hobby machines, made for single-pass welds on thin steel where no code requirement or multipass buildup is involved.