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Metalworking (rec.crafts.metalworking) Discuss various aspects of working with metal, such as machining, welding, metal joining, screwing, casting, hardening/tempering, blacksmithing/forging, spinning and hammer work, sheet metal work. |
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#1
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Composition of low melt temp fixturing alloy
I'm trying to find out *for sure* wha hte alloy mix is of the
fixturing alloy sold by ENCO. They say it expands by .0002"/inch when it solidifies and that it melts at 158°F. In the machinist's handbook they describe an alloy that melts at 158°F made of Bismuth, tin, lead and cadmium but they don't specify that it expands on solidification. Anyone have some knowledge about this? And where I can find some cadmium cheap? John Please note that my return address is wrong due to the amount of junk email I get. So please respond to this message through the newsgroup. |
#2
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Composition of low melt temp fixturing alloy
On Sun, 13 Jul 2003 21:37:28 GMT, (John Flanagan) wrote:
And where I can find some cadmium cheap? EPA Superfund site. Cadmium fumes are seriously toxic. Gary |
#3
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Composition of low melt temp fixturing alloy
John Flanagan wrote:
I'm trying to find out *for sure* wha hte alloy mix is of the fixturing alloy sold by ENCO. They say it expands by .0002"/inch when it solidifies and that it melts at 158°F. In the machinist's handbook they describe an alloy that melts at 158°F made of Bismuth, tin, lead and cadmium but they don't specify that it expands on solidification. Anyone have some knowledge about this? I do know that back in the days of metal type, antimony was added to type metal to make it expand on solidification. Learned that in Jumior High Print Shop a loooooooong time ago. :-) Ted |
#4
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Composition of low melt temp fixturing alloy
Search www.mcmaster.com for "cerro alloys". They all expand various amounts
upon solidification. Specify which alloy you want and I may have the expansion data in the my shop. Randy "John Flanagan" wrote in message ... I'm trying to find out *for sure* wha hte alloy mix is of the fixturing alloy sold by ENCO. They say it expands by .0002"/inch when it solidifies and that it melts at 158°F. In the machinist's handbook they describe an alloy that melts at 158°F made of Bismuth, tin, lead and cadmium but they don't specify that it expands on solidification. Anyone have some knowledge about this? And where I can find some cadmium cheap? John Please note that my return address is wrong due to the amount of junk email I get. So please respond to this message through the newsgroup. |
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Composition of low melt temp fixturing alloy
On Mon, 14 Jul 2003 15:58:51 GMT, "Randal O'Brian"
wrote: Search www.mcmaster.com for "cerro alloys". They all expand various amounts upon solidification. Specify which alloy you want and I may have the expansion data in the my shop. I can find the alloy through ENCO if I wanted. The reason I ask for a source of cadmium is so I don't end up paying $35/lb for it. John Please note that my return address is wrong due to the amount of junk email I get. So please respond to this message through the newsgroup. |
#7
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Composition of low melt temp fixturing alloy
On 15 Jul 2003 09:15:16 -0700, (Stan Schaefer)
wrote: (John Flanagan) wrote in message ... On Mon, 14 Jul 2003 15:58:51 GMT, "Randal O'Brian" wrote: Search www.mcmaster.com for "cerro alloys". They all expand various amounts upon solidification. Specify which alloy you want and I may have the expansion data in the my shop. I can find the alloy through ENCO if I wanted. The reason I ask for a source of cadmium is so I don't end up paying $35/lb for it. John Please note that my return address is wrong due to the amount of junk email I get. So please respond to this message through the newsgroup. I think you'll find that making your own low-melting alloys will be a lot more costly than you think. Bismuth in particular isn't cheap stuff. Now if you're making the stuff up in hundred-weight lots, you might be able to get a price break on the ingredients. Cerrosafe isn't $35/lb if you get it from Brownells, if you need something lower temperature, you'll pay more, of course. The lower-melting point alloys tend to have more exotic ingredients the lower in temperature that you go. The lead and tin I have. Bismuth I can get for $10-$15/lb. Which works out to around $6/lb in the alloy (50% Bismuth). The cadmium I don't know where to find. The only sources of small amounts of cadmium that I know of are the lab suppliers and they might be getting a little reluctant to do business with a private citizen about now. They also tend to be really high priced, even for low-purity stuff. Pure cadmium doesn't have a lot of uses by itself, not like lead, it's usually plated on items or used as an alloy constituent. Not really available on the scrap market, either. Somebody's got it somewhere I'll find it sooner or later, I'm in no hurry. I made a rocket nozzle and would like to make it thinner so filling the interior up with this material would really do the trick. John Please note that my return address is wrong due to the amount of junk email I get. So please respond to this message through the newsgroup. |
#8
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Composition of low melt temp fixturing alloy
In article ,
John Flanagan wrote: On 15 Jul 2003 09:15:16 -0700, (Stan Schaefer) wrote: [ ... ] I think you'll find that making your own low-melting alloys will be a lot more costly than you think. Bismuth in particular isn't cheap [ ... ] The lead and tin I have. Bismuth I can get for $10-$15/lb. Which works out to around $6/lb in the alloy (50% Bismuth). The cadmium I don't know where to find. The only sources of small amounts of cadmium that I know of are the lab suppliers and they might be getting a little reluctant to do [ ... ] Somebody's got it somewhere I'll find it sooner or later, I'm in no hurry. I made a rocket nozzle and would like to make it thinner so filling the interior up with this material would really do the trick. I *hope* that you mean to use this as support while spinning the nozzle down smaller. The thought of a nozzle whose contour was being changed by a layer of low-melting alloy strikes me as rather exciting in service, shall we say? :-) Good Luck, DoN. -- Email: | Voice (all times): (703) 938-4564 (too) near Washington D.C. | http://www.d-and-d.com/dnichols/DoN.html --- Black Holes are where God is dividing by zero --- |
#9
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Composition of low melt temp fixturing alloy
On 16 Jul 2003 00:19:52 -0400, (DoN. Nichols)
wrote: In article , John Flanagan wrote: On 15 Jul 2003 09:15:16 -0700, (Stan Schaefer) wrote: [ ... ] I think you'll find that making your own low-melting alloys will be a lot more costly than you think. Bismuth in particular isn't cheap [ ... ] The lead and tin I have. Bismuth I can get for $10-$15/lb. Which works out to around $6/lb in the alloy (50% Bismuth). The cadmium I don't know where to find. The only sources of small amounts of cadmium that I know of are the lab suppliers and they might be getting a little reluctant to do [ ... ] Somebody's got it somewhere I'll find it sooner or later, I'm in no hurry. I made a rocket nozzle and would like to make it thinner so filling the interior up with this material would really do the trick. I *hope* that you mean to use this as support while spinning the nozzle down smaller. The thought of a nozzle whose contour was being changed by a layer of low-melting alloy strikes me as rather exciting in service, shall we say? :-) Yea, that's the idea. It's only about .062" thick now and it rings like crazy while turning (I do mean loud). I rammed a paper towel in it to help dampen the vibration but this stuff would work much better. Plus I don't think I'd dare go too much thinner without better interior support than paper. John Please note that my return address is wrong due to the amount of junk email I get. So please respond to this message through the newsgroup. |
#11
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Composition of low melt temp fixturing alloy
On 26 Jul 2003 19:41:14 -0500, Notho wrote:
Brownells sells Cerrosafe for about 18.00 a pound.... www.brownells.com It shrinks so I would loose support. I need something with a slight swell after solidifying. John Please note that my return address is wrong due to the amount of junk email I get. So please respond to this message through the newsgroup. |
#12
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Composition of low melt temp fixturing alloy
John Flanagan wrote:
It shrinks so I would loose support. I need something with a slight swell after solidifying. Does anybody still use linotypes today? You used to be able to get old slugs of type metal. This expands slightly when freezing. Ted |
#13
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Composition of low melt temp fixturing alloy
On Mon, 28 Jul 2003 17:04:34 GMT, (John
Flanagan) wrote: On 26 Jul 2003 19:41:14 -0500, Notho wrote: Brownells sells Cerrosafe for about 18.00 a pound.... www.brownells.com It shrinks so I would loose support. I need something with a slight swell after solidifying. That would be one of the other Cerro alloys, Cerrobend I think it is. -----= Posted via Newsfeeds.Com, Uncensored Usenet News =----- http://www.newsfeeds.com - The #1 Newsgroup Service in the World! -----== Over 80,000 Newsgroups - 16 Different Servers! =----- |
#14
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Composition of low melt temp fixturing alloy
There are a number of different Cerro-bismuth alloys. All of them expand
varying amounts when solid. www.mcmaster.com sells them. Randy "Jack Erbes" wrote in message ... On Mon, 28 Jul 2003 17:04:34 GMT, (John Flanagan) wrote: On 26 Jul 2003 19:41:14 -0500, Notho wrote: Brownells sells Cerrosafe for about 18.00 a pound.... www.brownells.com It shrinks so I would loose support. I need something with a slight swell after solidifying. That would be one of the other Cerro alloys, Cerrobend I think it is. -----= Posted via Newsfeeds.Com, Uncensored Usenet News =----- http://www.newsfeeds.com - The #1 Newsgroup Service in the World! -----== Over 80,000 Newsgroups - 16 Different Servers! =----- |
#16
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Composition of low melt temp fixturing alloy
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#17
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Composition of low melt temp fixturing alloy
On Mon, 28 Jul 2003 20:27:09 GMT, Ted Edwards wrote:
John Flanagan wrote: It shrinks so I would loose support. I need something with a slight swell after solidifying. Does anybody still use linotypes today? You used to be able to get old slugs of type metal. This expands slightly when freezing. You don't know that alloy composition do you? I think you're dating yourself here :^). John Please note that my return address is wrong due to the amount of junk email I get. So please respond to this message through the newsgroup. |
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