SOLDERING METALS

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Purple ball bullet Differences between soft solder and hard solder


Soft solder usually contains high amounts of soft metals like tin and lead.
The purpose of soft solder is to bridge a gap.
Hard solder connects two pieces of metal by expanding into the pores opened by high temperatures.
Hard solders are made of a high temperature metal (such as silver) with a small amount of tin to lower the melting temperature.
As long at a hard solder joint is protected with borax or yellow ochre, the melting point of the joint metal will rise with each successive heating.
Unlike hard solder, soft soldered joints become brittle with successive heatings. Also a soft soldered joint cannot be filed flush, because the strength of a soft soldered joint comes from the "encasing" of the joint ends by the solder.
Generally, hard solder forms a stronger joint than soft solder.


Purple ball bullet Hard solder

SOLDER MELTING TEMP PERCENTAGE SILVER
Hard
Medium
Easy
Easy-Flo
773
747
711
681
76%
70%
60%
50%



Purple ball bullet   DON'T USE SOFT SOLDERS!




Purple ball bullet What solders are appropriate for which metals?

Gold
Silver
Nickel Silver
Brass
Steel
Copper
Platinum
Aluminum
Niobium
Titanium
gold solder or a lower karat of gold
silver solders
silver solders
silver or brass solder
solder doesn't take well to steel
silver solders
platinum solder
lead-free aluminum solder
solder doesn't take well to Niobium
solder doesn't take well to Titanium



Purple ball bullet   PICKLE

Blue Gold
Electrum
Green Gold
Purple Gold
Red Gold
White Gold
alloy of Iron
alloy of Silver
alloy of Cadmium and Silver
alloy of Aluminum or Zinc
alloy of Copper
alloy of Nickel or Palladium



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