barrel bluing ?

Many rust bluing solutions are acidic, ferric chloride in acidic solution, usually.

One old article warned against anything in a damp cabinet that would lead to condensation of water droplets on the steel, it would spot the work. I don't think you would want actual steam, just high humidity. The author just set a pan of water over a lightbulb, not a hotplate.

I actually have a shotgun with the reciever hot blued and the barrel rust blued. (I think it unnecessary, it being a Remington with furnace brazed rib, but the gunsmith was taking no chances.) They are a very good color match contrary to one post above.
 
Jim K,

Now if we could just get the powers that be to decide whether "silver soldering" or "silver brazing" is correct, we'd have it settled. Still see both all the time.

I was looking at the Webster online dictionary. It defines brazing as soldering with non-ferrous alloy. Hmmm. Ever solder with one? I'm pretty sure that's called welding. One of their other definitions said "braze" is an old word for "harden". I suppose one might infer that "brazing" applies to hard rather than soft soldering?

I'll have to go look in some older dictionaries. I don't think the online ones are telling the whole tale.

Nick
 
Soldering with a non ferrous alloy is not welding-unless you are joining the same alloy you are soldering with. Soldering uses a different metal (usually softer) to join metals. "Brazing" refers to joining with brass. Brazing is also hard-soldering. Silver (hard) soldering uses a silver/copper alloy at high heat.
Silver-bearing (containing) solder uses a very small amount of silver in a lead/tin mixture to join metals. It is a low heat, or "soft" solder. Lead soldering is soft soldering.
Welding generally refers to joining steel to steel, using molten steel, but other metals can be welded.
Got it?
 
The definition of soft solder (using ANY filler metal) are below ~840 F.

Brazing or hard solder uses a filler (again, any metal) above 840 F.

Welding is defined as melting the base metal.
It can be steel, copper, etc. but the melting of the base metal is the defining part of the operation.

None of the process definitions rely on the materials being joined, or the filler as part of the definition.

Temperature for hard vs. soft solder, and melting of the base metal for welding.
 
Bill,

I think you misread what I was saying. The implication of that inadequate dictionary definition is that there is such a thing as a ferrous solder. My assumption is they think welding rod was a form of solder.
 
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