I know You can do this with regular quarters. Just copper and nickel. I’ve made plenty of guards for knives just stacking up about three dollars worth of quarters and throwing them in the forge. I don’t know about nickels.
You ever try with 90% silver quarters and regular quarters just stack them every other? You ever try that I’m dying to see that done here RU-vid it’s yet to be done I’ve tried it with 3 silver quarters and 5 or 6 regular quarters I came out with 3 regular quarters 2 silver they stuck but I wasn’t satisfied I need to see a pro so it