Mixed-thickness welding is one of the most demanding tasks in metal fabrication. Joining a 0.8 mm stainless-steel sheet to a 2.0 mm bracket or welding a 1.2 mm aluminum panel to a 3.0 mm support frame requires precise heat control, consistent penetration, and minimal distortion — areas where traditional TIG/MIG welding often struggles.
Why Mixed-Thickness Welding Is Challenging
When two materials with different thicknesses are welded together, their thermal behavior varies significantly:
- Thin plates heat up too quickly → burn-through risk
- Thick plates absorb heat fast → lack of fusion risk
- Weld pool becomes unstable
- Higher distortion on thin materials
- Inconsistent bead quality for manual TIG/MIG
Fiber laser welding solves these issues through high energy density, precise heat control, wobble welding, and deep keyhole penetration. The M Series 6-in-1 is uniquely suited for mixed-thickness welding tasks in both workshops and small-scale production environments.
Why the M Series 6-in-1 Excels in Mixed-Thickness Welding
Precise Heat Input Control
The M Series allows independent adjustment of:
- Laser power
- Wobble amplitude
- Wobble frequency
- Travel speed
- Focus position
- Gas flow and shielding
Operators can increase penetration on the thick plate while preventing overheating on the thin plate.
Wobble Mode Stabilizes the Melt Pool
Wider wobble patterns (2.5–4.5 mm) spread heat over the thin material, reducing burn-through. Narrow wobble patterns (1.5–2.5 mm) improve penetration on thick sections.
High Peak Power for Deep Penetration
M Series welders (1000W–2000W) maintain stable penetration across stainless steel, carbon steel, and aluminum in mixed-thickness joints.
Six Processes in One Machine
- Welding
- Cutting
- Cleaning
- Rust Removal
- Surface Polishing
- Spot Welding
Ideal for workshops that need both welding and finishing capabilities in a single workstation.
Recommended Mixed-Thickness Welding Parameters
These reference parameters are based on actual stainless steel, carbon steel, and aluminum tests using your real welding data.
Stainless Steel — 1200W Mixed-Thickness
| Thin + Thick | Speed | Power % | Wobble Width | Notes |
|---|---|---|---|---|
| 0.8 → 1.5 mm | 18 mm/s | 30–40% | 2.5–3.0 mm | Protect thin plate with wider wobble |
| 1.0 → 2.0 mm | 18 mm/s | 38–45% | 2.5–3.0 mm | Increase penetration on thick side |
| 1.5 → 3.0 mm | 12–8 mm/s | 40–65% | 3.5–4.5 mm | Stable wide-gap capability |
Carbon Steel — 1200W Mixed-Thickness
| Thin + Thick | Power | Wobble | Speed | Notes |
|---|---|---|---|---|
| 0.8 → 1.5 mm | 33–40% | 2.5–3.0 mm | 18 mm/s | Suitable for furniture frames |
| 1.2 → 2.0 mm | 38–67% | 3.0–3.5 mm | 15–12 mm/s | Deep penetration |
Aluminum — 1200W Mixed-Thickness
| Thin + Thick | Power | Wobble | Speed | Notes |
|---|---|---|---|---|
| 1.0 → 1.5 mm | 50–70% | 2.5–3.0 mm | 15–12 mm/s | Remove oxide before welding |
Best Applications for Mixed-Thickness Welding
- Stainless-steel kitchen equipment
- Metal furniture frames
- Electrical enclosures and cabinets
- Home workshop fabrication (Cloud users)
- Automotive brackets & structural parts
- Aluminum frames and panels
Try the M Series 6-in-1 Laser Welder
The Gweike M Series delivers stable, high-quality welds across stainless steel, carbon steel, and aluminum — even when joining mixed thicknesses.
Explore the M Series →