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The melting temp of lead is important for many things. It can affect how much lead you use in your castings, and if your mold is hot enough to make a smooth, shiny cast.
The Melting Point of Leaded Solder
The right melting point for solder is about 250 degrees Celsius. This allows it to melt quickly and easily. Besides this, the right melting point of solder also helps determine the quality of your solder metal.
Tin/Lead Alloys
The most common type of electronic solder is tin/leaded, which has a melting point of 183degC and consists of an alloy of tin (Sn) with a small percentage of lead (Pb). Other types of lead-free solders are also available, as well as indium/lead and low-temperature solders.
Lead-Free Alloys
The primary reason for manufacturers to shift to lead-free solders is to eradicate lead from electronic production and waste recycling processes. Other uses for lead-free alloys include temperature-sensitive components and materials in step-soldering applications.
Lead Free Alloys: The highest-melting point of these alloys is 217degC, which makes them a bit more challenging to work with than standard lead alloys. This is especially true for step-soldering applications.
To properly melted lead, it is important to have a safe area, the proper safety equipment, and the right tools. The best heating source for melting large quantities of lead is an oxygen-acetaline torch. It is also important to skim away any impurities and pour the molten lead into your chosen mold. It is also important to let the cast cool before unmolding it.