Welder Red Seal · Question
A welder is fabricating a small bracket using 6061-T6 aluminum alloy. The welding process is GTAW. Which filler metal is generally recommended for welding 6061-T6 to itself to maintain reasonable strength and corrosion resistance?
ER4043 is the most commonly recommended filler metal for welding 6061-T6 aluminum due to its good crack resistance and fluidity. While ER5356 can be used, ER404
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Question: A welder is fabricating a small bracket using 6061-T6 aluminum alloy. The welding process is GTAW. Which filler metal is generally recommended for welding 6061-T6 to itself to maintain reasonable strength and corrosion resistance?
Answer options:
- ER5356
- ER308L ✅ ER4043
- ER70S-6
Correct answer: ER4043
Explanation: ER4043 is the most commonly recommended filler metal for welding 6061-T6 aluminum due to its good crack resistance and fluidity. While ER5356 can be used, ER4043 is often preferred for 6061 due to better fatigue strength and lower sensitivity to solidification cracking. ER308L and ER70S-6 are filler metals for stainless steel and carbon steel, respectively, and are not suitable for aluminum.
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