Roto Metals does sell "Antimonial Lead" It varies in Sb quite a bit so I get pure (or whatever) and add superhard, more cost effective.
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Roto Metals does sell "Antimonial Lead" It varies in Sb quite a bit so I get pure (or whatever) and add superhard, more cost effective.
https://rotometals.com/lead-ingots-wire/
they sell it
Hi, YES I'm new on here but I couldn't help not putting 2 cents in. If you have "20-1" of anything that's 5%. SO, Multiply ANY amount of lead you got by 5% and it will tell you what amount of alloy to use. You will ALWAYS have a consistent ratio! (IE 10-1 is the same as 100-10 which is 10% of 100). Another way is to divide 1 by 20 which is .05 (5%)
Mixing ratio math is not done that way.
20:1 lead-tin alloys are made by adding 20 parts lead to one part of tin.
So there are 21 parts in total. That gives you 4.76% tin instead of 5% like the 1 in 20.
The difference in percentages is greater in small mixing ratios like 1:1 (2 parts total) or 2:1 (3 parts total).
general FYI: Lead pipe ingots I smelted XRF scanned at .6%Sn and 3.5% SB
This is a very cool app. Now if I could only get access to an XRF machine to test my alloys.
Very cool app, thanks. Downloaded to my droid turbo 2 and works perfect with Android office.
Sent from my XT1585 using Tapatalk
I downloaded the Lead calculator (THANK YOU) but I have a question. I water quench, how do I take that into account when using your calculator?
The calculator is only for air cooled alloys, so you'll just need to do some testing to see how the water quench affects the hardness.
I suggest that you drop a few samples out of each batch off to the side so you can take some before and after readings.
It would be great if you were to post your findings so others could get an idea of what to expect for a particular alloy.
Cheers
:drinks:
I have been casting for a couple of years now, I can not beleive I just found this. THANK YOU!
I purchased a pallet of Linotype when I first started and mix my pure lead I get from the scrap yard. This is going to be very helpful. Now to do some test casts so I can see how the water quench will effect hardness. My first try will be looking for something around 20 for some 44 Mag I want to cast for my Ruger 77/44 Rifle I just got.
great spreadsheet! Thank you for going to all the effort to do this. I had just crunched some numbers on a Superhard/reclaimed shot alloy mix and your spreadsheet matched my pencil/paper/calculator math without all the effort!
Bruce
down loaded apache open office and still in read only format. I want to try and make some alloy with the known scraps I have.
so I at least figured out how to get the alloy calculator to wwork...
when you open it from the link I need to find the paper and pencil symbol at the top left of the screen on the spred sheet. When you put the cursor over it it will say edit this file.... just be careful as its easy to edit any portion of the spread sheet.
This is a great boon, remember to read all of Bump's instruction's under the download, like all great things it has a couple minor quirks
Hi everyone, long time lurker, first time poster.
Thanks for the great spreadsheet.
I have question though, and i may have done something to the spreadsheet by accident, but I'm not sure my formulas are working correctly.
Here's my issues:
I put in that i have one pound of 50/50 solder, which on the chart shows to be a brinell of 14,yet with only the 1 lbs it shows an estimated hardness of 23.1, Am I missing something, did I mess something up?
Thanks
Attachment 199607
That is due to the limitations of the hardness formula. It is really only valid with tin and antimony percentages found in boolit alloys. The formula produces good values when both Sn and Sb are higher that about 1%, but not higher than about 6%. It is all we have so far, so it is what we use. Just keep that in mind when using the calculator.
Thanks,
Bumpo628