Most of the alloys we use commonly will rise in Bhn over a couple to a few months. If you let them sit for a couple years they start to drop a bit. Funny to think of a metal changing over time, but then, I understand concrete can take years to fully harden, so it sort of makes sense.Nope.
It's a scrap mix of a random kind.
Once time, I got three 5 gal buckets of them from a auto recycler. The end resulting alloy I had a hardness of 15Bhn ...and it didn't get there right away. There was likely some other elements in there. I'd measure them right after casting, they'd be 11. A couple weeks later they'd be 12 or 13. then a couple months later they'd reach 15 to 16. Someone here suggested that my alloy could have had some calcium in it. It was also alluded to, that if it was calcium, it was likely a "false" hardness, IIRC?
I know of a dozen zink casters that could take you to task with that comment Ian.
I have some of there bullets on my bench. My knee says NO STAIRS or Id have had pics to show.
There zink looks as good as any lino bullet I have seen. VERY CLEAN AND SHARP casts.
CW
AS Pure as whats in ZINK WHEEL WEIGHTS.
Dont make me hurt my knee..
Cw