Alloy Composition
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Glen Ring
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Alloy Composition
Years ago I bought over 100 pounds of alloy from a radiator shop. I molded some bullets yesterday and they weighed the same as the 1-20 bullets, but didn't have a really shiny appearance. Well formed, sharp details ..they just look different. I'm trying to determine the tin content to make an alloy mix for BPCR bullets...but I'm just guessing they are 40% tin. Short of sending the alloy to a lab, how can I make an educated guess at the tin content ?
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Gussy
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Re: Alloy Composition
Lead tester and check hardness. Radiator lead is high tin solder.
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rgchristensen
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Re: Alloy Composition
GLENN:
Hydrostatic weighing will give you the density of your solder, from which you can guesstimate the tin content. Or, most scrap yards have an XRF scanner that will give composition, and they might scan it for you.
CHRIS
Hydrostatic weighing will give you the density of your solder, from which you can guesstimate the tin content. Or, most scrap yards have an XRF scanner that will give composition, and they might scan it for you.
CHRIS
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rgchristensen
- Posts: 180
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Re: Alloy Composition
GLENN:
Hydrostatic weighing will give you the density of your solder, from which you can guesstimate the tin content. Or, most scrap yards have an XRF scanner that will give composition, and they might scan it for you.
CHRIS
Hydrostatic weighing will give you the density of your solder, from which you can guesstimate the tin content. Or, most scrap yards have an XRF scanner that will give composition, and they might scan it for you.
CHRIS
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Glen Ring
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Re: Alloy Composition
Thanks....I'll try that !!
There are those that talk, and those that act. Make a choice.
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Kurt
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Re: Alloy Composition
It most likely 60/40 bar solder. 60% tin/40% lead. With a solder alloy like 60/40, 50/50, 95/5 the tin is always listed first.
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"Socialism is a philosophy of failure, the creed of ignorance, and the gospel of envy, its inherent virtue is the equal sharing of misery"Winston Churchill
"Socialism is a philosophy of failure, the creed of ignorance, and the gospel of envy, its inherent virtue is the equal sharing of misery"Winston Churchill
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VectorMan
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Re: Alloy Composition
Glen I don’t think your far from Walters that sells the wads and lead. I’m sure he has a way to tell what you got I would think.
"keep adding powder til it bloodies your nose and blacks your eyes, then back it off bout 5 grains."
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Glen Ring
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Re: Alloy Composition
Kevin
I took a sample of this mystery alloy to a metal salvage place in Shawnee Oklahoma. They had a device that looked like a radar gun. They touched the ingot and the meter read out 95% lead, almost 2 % tin, and about 1.5% antimony. There was some trace stuff in there also. Thanks for the idea.
I took a sample of this mystery alloy to a metal salvage place in Shawnee Oklahoma. They had a device that looked like a radar gun. They touched the ingot and the meter read out 95% lead, almost 2 % tin, and about 1.5% antimony. There was some trace stuff in there also. Thanks for the idea.
There are those that talk, and those that act. Make a choice.
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SchuetzenDave
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- Location: St. Albert, Alberta
Re: Alloy Composition
My son used to work in a radiator shop.
He said they only used a 70/30 alloy for repairing radiators.
They had 500 lb.s of scrap piled up but did not want to dispose of it because they would be charged a toxic fee (so I volunteered to take it off their hands).
I cleaned it up and the hardness testing confirmed it was 30% tin.
I have been using it for 15 years and only have 100 lb.s left.
He said they only used a 70/30 alloy for repairing radiators.
They had 500 lb.s of scrap piled up but did not want to dispose of it because they would be charged a toxic fee (so I volunteered to take it off their hands).
I cleaned it up and the hardness testing confirmed it was 30% tin.
I have been using it for 15 years and only have 100 lb.s left.
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SchuetzenDave
- Posts: 864
- Joined: Mon Jan 07, 2013 9:07 am
- Location: St. Albert, Alberta
Re: Alloy Composition
A 1 lb. bar of 30% alloy will make:
20:1 alloy by adding 5.31 lb. of lead (4.76 % tin)
25:1 alloy by adding 6.81 lb. of lead (3.85% tin)
30:1 alloy by adding 8.31 lb. of lead (3.23% tin)
20:1 alloy by adding 5.31 lb. of lead (4.76 % tin)
25:1 alloy by adding 6.81 lb. of lead (3.85% tin)
30:1 alloy by adding 8.31 lb. of lead (3.23% tin)