Since this thread bumped, I figured I would post some pictures of the material I was using as an example.
There is a difference between these types of brazing rods, and the regular rods that most people are familiar with. Most rods are an alloy, these are actually two tubes that are spun weld together, not alloyed. So where the normal brazing rods can be melted, and re-used, these cannot be because of the type of brazing rods they are. I am not sure what applications they are used for, but for whatever reason the copper needs to be separate from the silver.
If you look, you can see where the silver meets the copper, and that they are two separate metals, and not alloyed.
If you notice they are not consistent, this is the reason they are sheared off the ends, because they are not perfect or anywhere close.
Also notice they are different sizes, they make several different sizes with different percentages
The last time these came up, they assayed out at 5.62% silver and the rest copper at almost 5k lbs of total material.
Imagine how many places produce i-waste in volumes like this.
Scott
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