? for the guys experimenting with CU in alloy

[arcticbreeze]

Tonight I was able to play around a little with the method popper was describing with copper sulfate. Everything went pretty much as describe by the people who have tried this. The question I have is, have you noticed a definite increased sheeting action of the alloy as it is being poured into an ingot mold? In fact if I poured slowly it would solidify into sheet hanging off the end of the ladle.

Thanks
Marc

[I'll Make Mine]

In fact if I poured slowly it would solidify into sheet hanging off the end of the ladle.

This is happening because the copper has raised the melting point of the alloy, and you're now pouring too cold. I've seen plain clip-on wheel weights do the same when the pot was starting to cool. Heat up the pot another fifty degrees F (roughly) and you should see a return to normal behavior.

[runfiverun]

it does that when you are casting too.
follow the above directions.

[arcticbreeze]

I was using a Waage pot I normally cast ww plus 2% tin at the setting of 7. That puts me around 700f checked a while ago with a thermometer. I had the pot turned up to 10 (as high as it will go) but did not recheck temp. I will remelt tonight and check it with a thermometer. The Waage pot use to get pretty hot on 10 (900+). I haope the element is burning out.

[Jim Flinchbaugh]

I had to go near 800 with the batch I made to get rid of wrinkles and sheeting

[popper]

My PID controlled BP pot cast em great @ 725F. Alum moulds, 3x & 4x 165- 180 Gr. rifle. Pop right out after the sprue is cut. Just Pb/Sb/As/Cu. Good fill and no wrinkles.