ARCCAPTAIN Aluminum Welding Wire 1 Pound Aluminum MIG Wire

Performance Characteristics The differing chemical compositions lead to distinct performance characteristics:

• Strength ER5356 is significantly stronger, with a typical shear strength of 18 KSI compared to 11 KSI for ER4043. It is the standard for load-bearing structural parts.
• Operating Temperature ER4043 can be used in environments exceeding 150°F (66°C), while ER5356 is not recommended for these elevated temperatures due to potential stress corrosion cracking.
• Ductility ER5356 is more ductile and flexible, making it better for parts subject to vibration or post-weld forming.
• Anodizing Color Match ER5356 provides a much better color match to the base metal after anodizing. ER4043 typically turns dark gray or black after the process.

Welding Performance & Ease of Use The two fillers behave differently during the welding process:

• Weldability & Flow ER4043 has excellent fluidity and a lower melting point, making it easier for beginners to control and better at bridging gaps.
• Wire Feeding Because it is stiffer, ER5356 often feeds more reliably through MIG welding systems. ER4043 is softer and more prone to feeding issues without a spool gun.
• Crack Resistance ER4043 is highly resistant to hot cracking, especially when welding 6xxx series alloys like 6061.
• Aesthetics ER4043 produces smoother, shinier welds with less spatter. ER5356 welds often have a duller, “frosty” appearance and generate more soot (smut).

Common Applications

Chemical Composition Comparison Standard Reference: AWS A5.10 / ISO 18273

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