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Using Solution Welding Rod For Boat Fabrication
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<blockquote data-quote="maintenanceguy" data-source="post: 478033" data-attributes="member: 24227"><p>Sounds like this is an aluminum brazing rod instead of a traditional electric arc welding rod.</p><p></p><p>I've used aluminum brazing rods with success but not this brand. However, there are some issues.</p><p></p><p>1) Unlike steel, aluminum does not change color as the temperature changes. Steel will get yellow, orange, red, and white before it completely melts. Aluminum just melts with no warning. There is danger of overheating the aluminum base metal with your torch and having the metal collapse in a puddle leaving a big hole. I have done this.</p><p>2) Aluminum brazing rod melts at a temperature close to the base metal melting point. This means that once you get your base metal hot enough for the rod to bond well, you're dangerously close to melting the base metal - see #1.</p><p>3) I suspect the tensile strength of the brazing rod is not really 45psi. There lots of aluminum alloys but the most common ones have tensile strengths between 18,000 psi and 45,000 psi. A 45psi tensile strength is probably closer to duct tape. Is it possible it's 45 ksi?</p><p>4) If I was building a whole boat, I would buy a tig welder and learn to tig for this project. Even mig leaves imperfections in the welds.</p></blockquote><p></p>
[QUOTE="maintenanceguy, post: 478033, member: 24227"] Sounds like this is an aluminum brazing rod instead of a traditional electric arc welding rod. I've used aluminum brazing rods with success but not this brand. However, there are some issues. 1) Unlike steel, aluminum does not change color as the temperature changes. Steel will get yellow, orange, red, and white before it completely melts. Aluminum just melts with no warning. There is danger of overheating the aluminum base metal with your torch and having the metal collapse in a puddle leaving a big hole. I have done this. 2) Aluminum brazing rod melts at a temperature close to the base metal melting point. This means that once you get your base metal hot enough for the rod to bond well, you're dangerously close to melting the base metal - see #1. 3) I suspect the tensile strength of the brazing rod is not really 45psi. There lots of aluminum alloys but the most common ones have tensile strengths between 18,000 psi and 45,000 psi. A 45psi tensile strength is probably closer to duct tape. Is it possible it's 45 ksi? 4) If I was building a whole boat, I would buy a tig welder and learn to tig for this project. Even mig leaves imperfections in the welds. [/QUOTE]
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Using Solution Welding Rod For Boat Fabrication
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