Short-Circuit Transfer Mode: Low Heat Input MIG/MAG Welding

Short-Circuit Transfer Setup Parameters

1. Voltage Control. Set voltage 16-20V to ensure short-circuit mode. Higher voltage transitions to globular transfer with excessive spatter.
2. Wire Feed Speed. Start with 2-3 m/min for 0.8mm wire on thin materials, increase to 4-5 m/min for thicker sections. Balance against burn-through risk.
3. Inductance Setting. Use low inductance (1-3) for crisp arc action and reduced spatter. High inductance softens the arc but may increase penetration.
4. Gas Selection. CORGON® S5 (Ar + 5% CO2) provides optimal balance of low spatter and good wetting. Flow rate 12-18 L/min.
5. Travel Speed. Maintain 150-300mm/min depending on material thickness. Slower speeds risk burn-through, faster speeds cause lack of fusion.

Critical Short-Circuit Transfer Mistakes

• Don't exceed 22V with short-circuit mode - higher voltages cause transition to globular transfer with violent spatter and poor fusion.
• Don't use high CO2 content gases - increased spatter and rougher arc characteristics. Stick to 5-10% CO2 maximum for best results.
• Don't ignore stick-out variations - changing wire extension alters current density and can push into globular transfer unexpectedly.
• Don't weld without proper fit-up - short-circuit mode cannot bridge large gaps. Maintain 0-1mm root opening maximum.
• Don't use excessive wire feed speed - creates stub-out condition where wire pushes into joint without proper transfer.
• Don't attempt thick single-pass welds - short-circuit mode limited to ~6mm penetration. Use multiple passes for thicker materials.

Applications and Technique Optimization

Thin sheet metal (0.5-2mm): Use 0.6-0.8mm wire with minimal stick-out (6-10mm). Reduce travel speed and use slight weaving to distribute heat. CORGON® S5 essential for low heat input.

Vertical and overhead positions: Reduce wire feed speed 15-20% from flat position settings. Use slight pause-and-move technique to control molten pool. Smaller diameter wire (0.8mm) preferred.

Root pass welding: Essential for penetration control on pipe and pressure vessel work. Use CORGON® 10 for improved arc stability. Maintain consistent keyhole for full penetration.

Galvanized steel: Short-circuit mode minimizes zinc vaporization compared to spray transfer. Increase gas flow to 20-22 L/min to clear zinc fumes from weld zone.

Fillet welds in corners: Short-circuit excels at accessing tight joints. Use smaller nozzles and maintain proper gun angle to ensure gas coverage in confined spaces.