Aluminum ER4943 Filler Rod

Alucon ER4943 Aluminum TIG Welding Rod

ER4943 is a high-performance silicon-based aluminum filler engineered for stronger welds and improved heat stability compared to ER4043 and ER5356. Designed for 6xxx series aluminum, it delivers excellent crack resistance, smooth arc control, and reliable strength in heat-exposed automotive applications.

Unlike ER5356 (recommended under ~150°F), ER4943 maintains mechanical properties more effectively at elevated temperatures up to ~200–250°F, making it ideal for components exposed to sustained heat and thermal cycling.

Key Features

• Higher strength than ER4043
• Better elevated-temperature performance than ER5356
• Excellent crack resistance on 6xxx aluminum
• Smooth arc characteristics and clean weld flow
• Low shrinkage and good machinability

Ideal Applications

✔ Intercooler and coolant tanks
✔ Radiators and heat exchangers
✔ Turbo piping and intake systems
✔ Heat-exposed aluminum components

For cosmetic or anodized applications, ER5356 may be preferred. For heat stability and performance builds, ER4943 is the smarter choice.