![]() ![]() However, there are also a few AlMg casting alloys. The best filler alloy to repair these castings is 4043. ![]() The most common aluminum casting alloys are AlSiMg alloys (like 356 and 319). What filler metal do you use? I can’t really give you a guarantee. ![]() OK, now you know that your casting is really an aluminum alloy. But if you put white vinegar on a magnesium alloy, it will bubble and fizz. If you put a small amount of white vinegar (yes, the stuff you buy in the supermarket) on an aluminum alloy, it will sit there and do nothing. If you attempt to repair a magnesium casting with aluminum filler rod (or vice versa), you will not be successful.įortunately, there is an easy way to tell the difference between the two. While many such parts on motorcycles, ATVs, and cars are made from aluminum, just as many are made from magnesium alloys. How do I repair it?”įirst, you need to determine if the casing is really aluminum casting. “I have a 1950s motorcycle that has a crack in the transmission casing, which is aluminum. The question usually goes something like this: I have received numerous versions of the same question over the last several years. ![]()
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