From Our Clients' Shops: MIG Welding Case Studies with the ARCPEX MIG200
These welds were submitted by ARCPEX clients — unedited, straight from their shops and job sites. Heat patina art, structural fabrication, and process comparisons. This is what the MIG200 delivers in the field.
Case Study 01 — Heat Patina Effect on Steel
One of the most visually striking results achievable with MIG welding is the natural heat patina — the rainbow of blues, purples, and golds that appear on steel as it cools. This client used the ARCPEX MIG200 to create deliberate, controlled heat patina effects on fabricated steel pieces for a decorative metalwork commission.
Heat patina overview — blue-gold-purple gradient from controlled heat input on clean mild steel.
Close-up of heat patina gradient — consistent color banding indicates controlled, even heat input.
Settings Used — Case Study 01
| Parameter | Setting | Effect on Patina |
|---|---|---|
| Voltage | 17–19V | Lower voltage = more concentrated heat = deeper color |
| Wire Speed | 180–220 IPM | Synergic mode auto-balances with voltage |
| Wire | 0.8mm ER70S-6 | Cleaner bead, less spatter, better patina visibility |
| Gas | 75% Ar / 25% CO₂ | C25 mix produces cleaner surface than pure CO₂ |
| Travel Speed | Slow and consistent | Slower = more heat = more vivid color gradient |
| Base Metal | Clean mild steel | Must be free of mill scale, rust, and oil for best patina |
Case Study 02 — MIG vs TIG Side-by-Side Comparison
This client ran both MIG and TIG beads on the same piece to evaluate process differences before committing to a production method — a practical approach for any fabricator choosing between processes for a new job.
MIG vs TIG side-by-side on the same steel — both produced with ARCPEX machines. Notice the difference in bead profile, ripple pattern, and heat-affected zone width.
| Characteristic | MIG (GMAW) | TIG (GTAW) |
|---|---|---|
| Bead Profile | Wider, flatter, more convex | Narrower, more precise, stack-of-dimes |
| Heat-Affected Zone | Wider HAZ | Narrower HAZ — less distortion |
| Travel Speed | Faster | Slower — more control |
| Spatter | Some (minimized with C25 gas) | Zero spatter |
| Skill Required | Lower — synergic auto-set helps | Higher — both hands + foot pedal |
| Best For | Production, structural, thick material | Precision, thin material, aesthetics |
Case Study 03 — Structural Steel Fabrication
Structural fabrication — fillet welds, lap joints, and T-joints that need to hold load in service. These welds from a client's fabrication shop demonstrate the ARCPEX MIG200's performance on day-to-day structural work.
Client weld — clean bead profile, minimal spatter, natural heat tint on surrounding steel.
Structural fillet weld — ARCPEX MIG200. Good toe fusion, consistent bead width, no undercut.
ARCPEX MIG200 in the client's shop — structural steel fabrication, synergic mode.
Finished structural weld — consistent ripple, clean toes, minimal post-weld cleanup required.
The Machine Behind These Results
ARCPEX MIG200 — 6-in-1 Multi-Process Welder
- ✅ MIG · Flux Core · Aluminum MIG · Lift TIG · Stick — one machine
- ✅ Synergic auto-set — perfect parameters every time
- ✅ 110V/230V dual voltage — home outlet or shop power
- ✅ ~22 lbs — lightest 200A welder in class
- ✅ 1-year warranty · Free US shipping · Lifetime tech support
FAQ: ARCPEX MIG200 — Client Questions
Can the ARCPEX MIG200 produce heat patina effects?
How does MIG compare to TIG on the same material?
What shielding gas should I use with the ARCPEX MIG200?
Is the ARCPEX MIG200 suitable for professional fabrication shops?
What materials can the ARCPEX MIG200 weld?
Ready to Start Your Own Project?
ARCPEX MIG200 — $399.99 · 6-in-1 multi-process · Synergic auto-set · 110V/230V · Free US shipping
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