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Very Hot Topic (More than 25 Replies) Lead Alloy Calculator (Read 10161 times)
Schuetzenmiester
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Re: Lead Alloy Calculator
Reply #15 - Feb 2nd, 2020 at 2:48am
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marlinguy wrote on Feb 1st, 2020 at 12:37pm:
Just to calm the fears, this isn't going to bullets for my old single shots. I just wanted to know how to get close to the same hardness as 20:1 lead/tin mix.

And selling this for a profit would be great, but shipping wont make sense. So I'd have to find locals who wanted this linotype. I'd be tickled with half that $4 a lb. estimate. Or trade it for tin or lead.

You can ship up to 50# in a USPS Flate Rate Box.
  

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uscra112
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Re: Lead Alloy Calculator
Reply #16 - Feb 2nd, 2020 at 3:21am
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Quote:
You can ship up to 50# in a USPS Flate Rate Box.


True, but you may earn the undying enmity of your mail carrier.  Angry  My RFD carrier once refused to deliver a FRB lead shipment. Made me go to the Post Office to pick it up.  
  

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marlinguy
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Ballards may be weaker,
but they sure are neater!

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Re: Lead Alloy Calculator
Reply #17 - Feb 3rd, 2020 at 10:25am
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Schuetzenmiester wrote on Feb 2nd, 2020 at 2:48am:
marlinguy wrote on Feb 1st, 2020 at 12:37pm:
Just to calm the fears, this isn't going to bullets for my old single shots. I just wanted to know how to get close to the same hardness as 20:1 lead/tin mix.

And selling this for a profit would be great, but shipping wont make sense. So I'd have to find locals who wanted this linotype. I'd be tickled with half that $4 a lb. estimate. Or trade it for tin or lead.

You can ship up to 50# in a USPS Flate Rate Box.


That would hold one of my linotype bars, IF I cut it into smaller pieces to get in a flat rate box.
  

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uscra112
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Re: Lead Alloy Calculator
Reply #18 - Feb 3rd, 2020 at 12:59pm
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Yup.  Just cover the whole box with a layer of fiberglass strapping tape!
  

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JLouis
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Re: Lead Alloy Calculator
Reply #19 - Feb 3rd, 2020 at 2:01pm
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Vall if you would like to sell some you could list it here.

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Re: Lead Alloy Calculator
Reply #20 - Feb 4th, 2020 at 12:46am
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By far the best lead alloy calculator is available from Tom Myers at TMT Precision Software.
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Page down is page of software listing until you the listing for Precision Alloy Calculator.  For $19.95 it's a great deal.  It has all kinds of options and will tell you how to mix alloys and will provide the hardness number of just about any alloy mix.  I have used this calculator for years and would not be without it.  And BTW, Toms a good guy.

Wayne
  

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marlinguy
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Ballards may be weaker,
but they sure are neater!

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Re: Lead Alloy Calculator
Reply #21 - Feb 5th, 2020 at 10:28am
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uscra112 wrote on Feb 3rd, 2020 at 12:59pm:
Yup.  Just cover the whole box with a layer of fiberglass strapping tape!


Best to also line the inside of the flat rate box with thin wood too! I got an empty box from Rotometals a few years ago! Rotometals had simply put it in a flat rate box and taped it up with extra tape. The rough handling tore a hole in one end and by the time it arrived here the mailman handed mee an empty box with a hole in one end.
  

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beltfed
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Re: Lead Alloy Calculator
Reply #22 - Feb 5th, 2020 at 1:28pm
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Duct Tape at least
beltfed/arnie
  
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JLouis
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Re: Lead Alloy Calculator
Reply #23 - Feb 5th, 2020 at 3:28pm
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Did RotoMetals replace it Vall. On one of my past orders of 16-1 and unknowingly to me it contained antimony. I had topped off my 25lb pot and as soon as it came up to temp. I knew it contained antiimony. RotoMetals replaced the 25lbs that was now contaminated at now cost to me. All I had to do was to describe what the molten alloy visually looked like. They apologized and I received the 25lbs. of the correct alloy delivered to me the very next day.
  

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texasmac
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Re: Lead Alloy Calculator
Reply #24 - Feb 5th, 2020 at 3:58pm
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JLouis wrote on Feb 5th, 2020 at 3:28pm:
Did RotoMetals replace it Vall. On one of my past orders of 16-1 and unknowingly to me it contained antimony. I had topped off my 25lb pot and as soon as it came up to temp. I knew it contained antiimony. RotoMetals replaced the 25lbs that was now contaminated at now cost to me. All I had to do was to describe what the molten alloy visually looked like. They apologized and I received the 25lbs. of the correct alloy delivered to me the very next day.


JLouis,

Can you describe the appearance of the molten alloy when it contains antimony vs. lead & tin which I have a lot of experience with?  One of the reasons I'm asking is I'm planning to experiment with some wheel weight & scrap range lead which has been cast in 1lb ingots, but the ingots are mixed up with pure lead & tin alloy so I don't know which is which. Thanks.

Wayne
  

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JLouis
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Re: Lead Alloy Calculator
Reply #25 - Feb 5th, 2020 at 4:18pm
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Wayne it is a bit hard to describe. I spent over a year experimenting with various alloys containing various amounts of antimony. During this time I learned how to easily recognize if an alloy was either lead and tin only or if it contained antiimony they just don't look the same. Lead and tin when fluxed is very bright and clean looking as are the bullets. If having antimony it is more frosted in appearance as are the bullets but not by much. If it contains allot of antimony it will start to get frothy on the surface and even more so as you continue to top it off. And the appearance of the bullets will even start looking more frosted as well.
« Last Edit: Feb 6th, 2020 at 12:53pm by JLouis »  

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uscra112
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Re: Lead Alloy Calculator
Reply #26 - Feb 5th, 2020 at 4:21pm
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Once it's in the pot you're committed.  Wouldn't a hardness tester be in order?
  

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Re: Lead Alloy Calculator
Reply #27 - Feb 5th, 2020 at 5:02pm
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JLouis wrote on Feb 5th, 2020 at 4:18pm:
OWayne it is a bit hard to describe. I spent over a year experimenting with various alloys containing various amounts of antimony. During this time I learned how to easily recognize if an alloy was either lead and tin only or if it contained antiimony they just don't look the same. Lead and tin when fluxed is very bright and clean looking as are the bullets. If having antimony it is more frosted in appearance as are the bullets but not by much. If it contains allot of antimony it will start to get frothy on the surface and even more so as you continue to top it off. And the appearance of the bullets will even start looking more frosted as well.


Thanks.  That definitely helps.

Wayne
  

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Re: Lead Alloy Calculator
Reply #28 - Feb 5th, 2020 at 5:47pm
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uscra112 wrote on Feb 5th, 2020 at 4:21pm:
Once it's in the pot you're committed.  Wouldn't a hardness tester be in order? 


uscra112,

Measuring the hardness does not necessary provide an indication of the antimony content if any.  For example, the commonly acceptable alloy mix of wheel weight alloy is 95% lead, 4% antimony & 0.5% tin with the rest comprised of a small amount of arsenic and other trace elements.  Using the Tom Myers’ allow calculator I commented on earlier, the resulting BHN is 12.  A mix of only 89% lead & 11% tin results in the same BHN of 12.

And the BHN measuring equipment that we casters typically have are not very accurate & only provide a rough approximation of the hardness.

Wayne
  

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uscra112
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Re: Lead Alloy Calculator
Reply #29 - Feb 5th, 2020 at 6:47pm
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He could sort out what is pure lead by measuring hardness.  That puts him well ahead of where he is now.  He doesn't need NIST traceable accuracy, just needs enough precision to tell dead soft from not-dead-soft.  I can certainly do that with the rather crude Cabine Tree tool that I have.  

Only better tool would be one of those test gadgets that scrapyards are said to have. 
  

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