Can you melt old solder?

you want a stronger iron, so you can get the solder joint melted and done before heating up the entire component and damaging it. running some fresh solder into the spot you’re trying to melt can help, as new solder seems to melt faster than old, and will help the old solder get started.Click to see full answer. Hereof, can you melt solder?In fact, solder must first be melted in order to adhere to and connect the pieces together after cooling, which requires that an alloy suitable for use as solder have a lower melting point than the pieces being joined. Alloys that melt between 180 and 190 °C (360 and 370 °F; 450 and 460 K) are the most commonly used. why does my solder not melt? Solder has a very low melting point (compared to other metals/alloys). Even a weak 40W iron should melt it almost instantly. If it’s not melting the solder, then the iron is not hot enough or even working. The thicker solder requires more heat to melt. Moreover, can you use old solder? Because you often have a roll of solder for many years. And it seems like normal solder wire does not really go bad. But the rosin core inside of it might. This means that for soldering larger solder joints, you won’t have any problems with old solder wire.What do you do if Solder won’t melt?try flowing in a little new solder, which might help transfer heat and melt the old. also, a good quality soldering iron tip would be immediately ruined by sanding it. if you can’t get solder to flow onto the iron itself, it’ll do you no good on anything else.

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