The FEIFANKE flux core wire is a 0.035 inch (0.9 mm) gasless, self-shielded wire for mild steel, sold as a small 2 lb spool according to the Amazon listing. It runs in a wire-feed welder set up for flux-core, so you do not need a shielding gas bottle. It suits light repairs and hobby fabrication. Skip it if your welder cannot take this spool size, or if you need a wire with a published AWS classification for code work.
FEIFANKE Flux Core Wire at a Glance
| Item | Detail |
|---|---|
| Wire type | Gasless (self-shielded) flux-cored wire, per the listing |
| Diameter | 0.035 in (0.9 mm), per the listing |
| Base metal | Mild steel, per the listing |
| Spool weight | 2 lb, per the listing |
| AWS classification | Not confirmed here. Check the spool label before relying on it |
| Polarity | Gasless flux-core wire normally runs electrode negative (DCEN). Follow the spool label and your welder manual |
| Uses named in the listing | Steel frames, guardrails, furniture and similar light fabrication |
Who This Wire Suits
- Owners of a small flux-core or MIG welder without a gas bottle.
- Beginners practicing on mild steel who want a simple setup.
- Outdoor or drafty garage repairs, where shielding gas can blow away. Self-shielded wire does not rely on a gas bottle, but wind still affects the arc, so work in the lee of a wall when you can.
It is a poor fit for stainless steel, aluminum, or thin sheet where the hot flux-core arc can burn through.
How to Check It Fits Your Welder
- Spool size. Confirm your machine’s spindle takes a 2 lb spool, or that you have the right adapter.
- Wire size. Your contact tip, liner and drive roll must match 0.035 inch.
- Drive roll. Flux-cored wire is soft. A knurled or V-knurled drive roll grips it better than a smooth one, and too much drive tension can crush the wire.
- Polarity. Swap the leads for electrode negative if your manual says so for gasless wire.
- Settings. Start from your welder’s chart for 0.035 inch flux-core and adjust on scrap steel of the same thickness.
Pros and Limitations
Pros
- No gas bottle or regulator needed.
- Works on mild steel with a basic wire-feed machine.
- Small spool is easy to store and cheap to try.
Limitations
- Flux-core leaves slag you have to chip off, and produces more smoke than solid wire with gas.
- The listing does not give a classification or mechanical data we could confirm.
- A 2 lb spool runs out quickly on larger projects.
Welding With Gasless Flux-Core Wire Safely
- Weld in a ventilated area. Flux-core produces noticeable fume, so keep your head out of the plume.
- Wear a proper welding helmet, leather gloves and flame-resistant clothing.
- Wear safety glasses when chipping slag.
- Do not weld galvanized, plated or painted steel without removing the coating and ventilating well.
- Keep a fire extinguisher nearby and clear flammables from the work area.
Related reading: how flux core welding works · self-shielded vs gas-shielded flux core · E71T-GS flux core wire review · flux core MIG settings chart
Frequently Asked Questions
Is the FEIFANKE flux core wire good for beginners?
It can be a reasonable starting wire because it needs no gas setup. You still need correct polarity, drive roll tension and settings for your machine, so practice on scrap first.
Do I need shielding gas with this wire?
No. The listing describes it as gasless. The flux inside the wire makes its own shielding. Check polarity before connecting the leads, because many gas MIG setups run electrode positive.
Can I use FEIFANKE flux core wire outdoors?
Self-shielded wire is commonly used where wind would disturb gas shielding. Strong wind can still disturb the arc, so shelter the weld area where possible.
What polarity does gasless flux-core wire use?
Most gasless flux-core wires run on DC electrode negative. Check the spool label and your welder manual before connecting the leads.
Does flux-core welding make fumes?
Yes. Flux-core produces more visible smoke than solid wire with gas. Use ventilation or fume extraction and wear a respirator where your workplace rules require one.
Verdict
This is a simple gasless wire for mild steel repairs on a compatible small welder. Confirm the spool size, wire diameter and polarity for your machine, and check the current listing for details the seller may have updated.
