Silver Soldering? Why won't it stick?

[the dakota kid]

Hello All,

I am trying to silver solder a block in the trigger assembly on my "new" Uzi, but the solder will not stick to the lower? It sticks very well to the block that I have. I am using flux and I cleaned all the paint off of the lower, but it still will not stick. Any hints?

thanks,
tdk

 

[orgdnr]

Are they dissimilar metal? If not it sounds like you are too cold.
Would TIG be better? If so,I can do that.(I can also silver solder for thet matter)
Post a photo of the weld you are trying to do, and I will see if I can help.

 

[the dakota kid]

How about just riviting the block in place or would that not be "permanent" enough?

 

[kanewtervalve]

If you have any oil residue at all it won't stick, are you using a MAPP torch, a regular propane one will not get the area hot enough, I know it will work, Pa. Patriot did the same thing to an Uzi lower someone was building into a semi.

 

[UZI SBR AWC]

Bore a hole in the center of your block, and "rosette" (spelling) the hole with either TIG or MIG. Maybe see if a local body shop has a pinch type spot welder, but the MIG or TIG be the quickest/easiest to do, and shows intent of permanent mounting,, even though the block in the semi groups is spot welded.