OK,
I am confused. In the article "The metallurgy of Molten Lead Alloys" by Dennis Marshall in the 3rd Edition of Lymans Cast Bullet Handbook I don't understand the properties of lead + zinc. Let's say I melt some wheel weights, which I did, and some where zinc....I didn't think so but.....
At 787.2 F zinc melts. Lead melts at 621.5 F.
I melted the wheelweights over my Coleman stove and pore my ingots. Some looked weak and 2 even broke. Malleability was not there.
If I do have a zinc contamination can I separate the zinc from the lead by remelting the ingots at a temperature above 621 but below 787?
I am using a bottom pour (Lee) system.
I am confused. In the article "The metallurgy of Molten Lead Alloys" by Dennis Marshall in the 3rd Edition of Lymans Cast Bullet Handbook I don't understand the properties of lead + zinc. Let's say I melt some wheel weights, which I did, and some where zinc....I didn't think so but.....
At 787.2 F zinc melts. Lead melts at 621.5 F.
I melted the wheelweights over my Coleman stove and pore my ingots. Some looked weak and 2 even broke. Malleability was not there.
If I do have a zinc contamination can I separate the zinc from the lead by remelting the ingots at a temperature above 621 but below 787?
I am using a bottom pour (Lee) system.