Process comparison
MIG Welding vs Stick Welding
MIG is faster, cleaner and easier indoors on prepared steel; stick works in wind and rain, tolerates rust and poor fit-up, and needs no gas bottle.
GMAW vs SMAW at a glance
| MIG Welding | Stick Welding | |
|---|---|---|
| AWS designation | GMAW — Gas Metal Arc Welding | SMAW — Shielded Metal Arc Welding |
| Filler delivery | Continuously fed solid wire plus shielding gas. | Flux-coated consumable electrode, no gas bottle. |
| Polarity | DCEP for all solid-wire GMAW | DCEP, DCEN or AC depending on the electrode classification |
| Typical amperage | 50–350 A depending on wire size and transfer mode | 20–350 A depending on rod diameter |
| Typical voltage | 16–24 V short circuit, 24–30 V spray | 20–35 V |
| Positions | All positions in short-circuit and pulsed transfer; flat and horizontal only in axial spray | All positions with most electrodes; E7024 and other 2-series rods are flat and horizontal only |
| Deposition rate | High — continuous feed with no stub loss | Moderate, reduced by stub loss and by stopping to change rods |
| Shielding | External shielding gas, so it cannot be used in wind without shelter | Self-shielding from the flux coating; no external gas |
| Skill level | Easiest of the arc processes to reach a usable weld with | Demanding at first — arc length is controlled entirely by hand |
| Slag | None | Yes — chip between passes |
Which should you use?
This comes down to where the work is. MIG's continuous wire and automatic arc length make it the faster, cleaner, easier process — in a shop, on clean steel, out of the wind. Stick carries its shielding in the electrode coating, so a breeze does not matter, the joint can be rusty and badly fitted, and the whole setup is a machine, two leads and a box of rods. Most structural field work is still stick or flux core for exactly that reason.
Choose mig welding when
- Indoor shop fabrication
- Clean, prepared steel
- High-volume and repetitive welding
- Sheet metal and thin plate
Choose stick welding when
- Outdoor and field work in any weather
- Rusty, painted or contaminated steel
- Maximum portability
- Structural code work requiring low-hydrogen electrodes
Strengths and limitations
MIG Welding
Advantages
- Fastest of the common processes to learn to a usable standard
- High deposition rate and high operator duty cycle
- No slag to chip between passes
- Works on material from 24 gauge sheet up to heavy plate
Limitations
- Shielding gas blows away in wind above about 5 mph
- Requires clean base metal — rust, paint and mill scale cause porosity
- Equipment is less portable than a stick machine
- Short-circuit transfer can produce cold lap on thick material if settings are wrong
Stick Welding
Advantages
- Works outdoors in wind and rain where gas-shielded processes fail
- Most portable equipment — a machine, leads and a box of rods
- Tolerates rust, mill scale, paint and poor fit-up better than MIG or TIG
- Electrode range covers carbon steel, stainless, cast iron, nickel and hardfacing
Limitations
- Slag must be chipped between every pass
- Deposition rate is limited by stopping to change electrodes
- Arc length is controlled entirely by hand, which takes practice
- Not practical below about 18 gauge sheet
MIG Welding vs Stick Welding — common questions
Is MIG or stick better for a beginner?
MIG. The gun maintains arc length automatically, so a usable bead comes much sooner. Stick requires manual arc length control from the very first weld.
Can you MIG weld outdoors?
Not without shelter. Wind above roughly 5 mph strips the shielding gas away and the weld goes porous. Self-shielded flux-cored wire or stick welding are the outdoor options.
Is stick welding stronger than MIG?
Both deposit 70 ksi class weld metal on carbon steel. Neither is inherently stronger, though short-circuit MIG can produce cold lap on thick material, which is why some codes restrict it.
Which handles thick plate better?
Both can, in multiple passes. Stick with E7018 is the traditional structural answer; MIG in spray transfer fills faster but needs the work positioned flat or horizontal.
Full process guides
MIG Welding (GMAW)
MIG welding feeds a solid wire electrode continuously through a gun while shielding gas protects the puddle — the fastest process to learn and the standard for production fabrication on clean steel.
Stick Welding (SMAW)
Stick welding burns a flux-coated electrode that supplies both filler metal and shielding — the most portable, most wind-tolerant and most forgiving process on dirty or rusty steel.