Welder Red Seal · Question
A welder is using the Gas Metal Arc Welding (GMAW) process to join two pieces of mild steel plate. The plates are 10 mm thick. Which filler metal classification would be most appropriate for general purpose welding of this material?
ER70S-6 is a common and appropriate filler metal for GMAW of mild steel, providing good mechanical properties and deoxidizing agents for clean welds. ER4043 is
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Question: A welder is using the Gas Metal Arc Welding (GMAW) process to join two pieces of mild steel plate. The plates are 10 mm thick. Which filler metal classification would be most appropriate for general purpose welding of this material?
Answer options:
- ER4043
- ER308L ✅ ER70S-6
- E312-16
Correct answer: ER70S-6
Explanation: ER70S-6 is a common and appropriate filler metal for GMAW of mild steel, providing good mechanical properties and deoxidizing agents for clean welds. ER4043 is for aluminum, ER308L is for stainless steel, and E312-16 is for dissimilar metals or high-strength applications, making them unsuitable for general mild steel welding.
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