Lino

[Tenbender]

This lino is blowing my mind. My WW are running 9 to 10 bhn. I mixed 7 lb WW with 2 lb lino and came up with 11.5 bhn. I needed 15 to 16 bhn for my 357 Max so 2 weeks ago I used 7 lb WW with 3 lb lino. Now I have 18 bhn. Guess it doesn't pay to think about it. It seems to have a mind of it's own. Guess I will try 2.5 lb. lino ?

[Mitch]

Are you checking Boolits or ingots.ingots will be different from boolits form a different cooling rate.something is off on the 18bnh reading.the 11.5 reading sounds about right.depending if your lino is depleted some or not.a 60% ww 40% lino 0r a 50/50 mix should get you about 15bhn.could be the lino is not lino.or you are making an error in your testing.

[Screwbolts]

Good info above, also your alloy needs at least 2 weeks after casting to stabilize/finalize crystalline formation, to get the accurate final hardness readings you need to check after minimum of 14 days.

Also as stated above if you are checking ingots you will get a softer reading on the surface that was not in contact with the ingot mold.

I often pour a 3/8 thick ingot from my pot after blending an alloy to throw in with the Boolitz to test hardness on. Keeping the ingot with the boolitz allows easy testing at different times to follow its changes over time.

Long live the cast.

Ken

[Yodogsandman]

You could get 15-16+ BHN from water dropping the boolits from the mold using just COWW's. Wait to test at least five days for quenched boolits.

[runfiverun]

you'd probably go a bit over the 15 bhn water dropping.

I don't know what your end goal is.
but from the sounds of things mixing your ww's with lino at a 3 to 1 ratio should get you in the 5-6% range for antimony.
this would be close to hardball alloy which is 2/6/92 yours would be more like 1.3-.5% tin