Harris Safety-Silv 56% 1/16 Silver Solder Brazing Alloy 1 Troy Ounce, 75310 5631

Overpriced, but flows like butter on copper with an acetylene torch.

Great product for brazing copper to steel on refrigeration lines.

Harris is a known brand: dependable quality--no surprises--it is what it says it is. With a little practice almost anyone can learn to silver solder. The secret is metal preparation, the use of the right flux, and rapid rise in temperature to red glowing hot. Propane is hot enough--the technique is to get the proper amount of heat to the metal to be soldered and not to use oxy-acetylene which will likely burn up the flux before soldering temperature is reached. Use white flux for small jobs and black flux for larger jobs which will take longer to heat up.

This is the problem solve braze filler for joining many metals. It flows like water, almost being eutectic. And wets easily thanks to the 56% Ag. Yes, pricey but this isnt for making fillets, it is for flowing into tiny joints and acting as a solder. Been using this type and brand for 25+ years. Just cannot justify the gamble with off brands. I dont go through much, this troy ounce will last at least 10 years unless Lady Luck throws more high dollar miracle jobs in my reach. It is easy to use..joints need 5 to 10 thousandths of clearance. Use Harris flux, white for most and black for stainless. Either GTAW or oxyacetylene with just a frogs hair of reducing flame. Throw the heat on the larger of the side of the joint, then touch the filler to the smaller part. When its hot enough, it will flow like magic. The joint is a hint golden which to me is pure beauty. Very tarnish resistant except to halogen salts or sulfur compounds. Proper joints will just show a line.

Works really well. I have soldered Mild Steel and Stainless with this. I use MAPP Gas, you do not need Oxy to get it to melt and run

Came unboxed, I hope it was 56% silver, but it worked great on Stainless steel to stainless steel brazing.

Used to braze a stainless line to a hard copper elbow. Used with black flux, worked perfectly. I used oxy-acetylene with a reducing flame. Focused on the stainless but the copper was red. Flowed easily uphill into an imperfect joint and sealed on the first attempt.

I have been very happy with this silver solder for 40 yrs which is why I keep coming back. Use Radnor (Harris) Stay-Silv white brazing flux (a small container will last a VERY long time and as it dries out it is occasionally necessary to add a few drops of water to return the flux to the right viscosity to stay where you put it).

Used this with propane torch on small crack in cast Iron. Clean well, apply generous amount of Stay-Silv flux, get it to a dull red heat and apply the silver solder.

The brazing alloy works great for joining small steel items.