Some kind of Babbitt?

[Big brass ones]

Just bought this tin alloy off ebay.

Looks to be promising!

http://i1048.photobucket.com/albums/s375/Cmpezzoni/KGrHqJHJBIE8e3kkQ9pBPOSWlr2g60_57.jpg
Primarily tin at 82% with antimony, and copper.
http://i1048.photobucket.com/albums/s375/Cmpezzoni/KGrHqZHJCE8fiKjimjBPOPz8Ddg60_35.jpg

what is this stuff?
could the unknown element in the alloy be arsenic?

Thanks guys!

[Big brass ones]

just melted this down into smaller ingots and it fluxed and poured just fine. whatever the unknown stuff is it certainly is not zinc or any contaminate that hinders a good cast boolit. I hope to do a BHN test soon!

[Big brass ones]

http://i1048.photobucket.com/albums/s375/Cmpezzoni/bhntesttin.jpg

Here is a Brinell hardness test with a 10mm ball and 500 Kg. The large indentation is from the wrong scale (3000 kg), and the smaller indent is from a rockwell b to verify results. I used an Older Tinius Olsen machine to get results so I'm sure there close to accurate.

4.22 mm indentation (d)
10mm indentor (D)
500 kg load held for 30 sec (P)

http://www.ajdesigner.com/phphardness/brinell_hardness_number.png

I got 34 Bhn

Let me know how i did.

[bumpo628]

How much did you pay and how much did you get?

[Big brass ones]

14 lbs for $120

[bumpo628]

That's about $10 a pound for the tin - not a bad deal at all.
The nice thing is that you know exactly what's in there so you can make some repeatable alloys.