Try looking here: http://en.wikipedia.org/wiki/Pinchbeck_(alloy) ... From: phil <phil.hermetic@...> To: hobbicast@yahoogroups.com Sent: Tue, 19 Feb...
42597
mikey98118
Feb 20, 2013 5:41 pm
I beg to differ; that was just typical shop humor (ex. "merry-go-round:). Machinist h-o-r-r-o-r stories all have to do with finding a mistake in a barrel full...
42596
Steven DePhillips
stevendeph
Feb 20, 2013 4:41 am
When i was a kid I worked in a machine shop were the old machinists used to tell machine shop horror stories and one of them was about a guy who after...
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StoneTool
owly055
Feb 20, 2013 1:46 am
Won't zinc do the same thing?...
42594
StoneTool
owly055
Feb 20, 2013 1:42 am
Years ago I wanted to break off a VW transaxle so I could use the bell to bolt a starter to VW engines to start them on the floor. I decided to simply hit it...
42593
Lyle
creepinogie
Feb 19, 2013 9:59 pm
Or if it says Volkswagen or Lawnboy on the casting.......
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Rupert
rwenig2
Feb 19, 2013 8:41 pm
Regular household white vinegar works fine too. You don't need distilled vinegar. Rupert ... -- yvt Rupert Wenig Camrose, Alberta, Canada. email:...
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Kerri Duncan
silverforges...
Feb 19, 2013 6:56 pm
Carl- simple test for Mg- scuff an area bright with some sandpaper and put a drop of distilled vinegar on it- if it fizzes- its Mg. Â ... From: Carl...
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Dick Morris
rmorris200
Feb 19, 2013 6:33 pm
It's been several years since I read about it, but my recollection is that tin or lead in very small quantities can cause corrosion cracking in zinc alloys. ...
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Carl
carl_r2000
Feb 19, 2013 6:20 pm
It is real hard to tell magnesium from aluminum. It is a little lighter but most of the scrap buyers think it is aluminum. The turnings catch fire very easy....
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phil
philwhitley73
Feb 19, 2013 6:03 pm
Gentlemen, There is a metal called "pinchbeck" which is a brass that was developed to look just like gold. I have looked but cannot find the proportions of...
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Carl
carl_r2000
Feb 19, 2013 5:48 pm
http://castboolits.gunloads.com/showthread.php?66241-Melting-points-of-Lead-and-Alloys  There is a chart here that shows the melting points of copper zinc...
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Lyle
creepinogie
Feb 19, 2013 5:11 pm
Nelson, I melt 420 series mag bronze, not magnesium. I've had a few bad experiences in my foundry but not that one.... Mag bronze is, for me anyway, the best...
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Nelson Collar
nel2lar
Feb 19, 2013 5:02 pm
Lyle Do not try to melt magnesium, it has a very low burning temp and once burning there is no way to put it out except taking its oxygen away. I would not...
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Lyle
creepinogie
Feb 19, 2013 4:42 pm
If I can't find mag. bronze which is a yellow color, then I use silicon bronze which you can buy at most metal suppliers and add up to 30% zinc to get a yellow...
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StoneTool
owly055
Feb 19, 2013 4:02 pm
Interesting....... I never thought about using pennies...........I actually didn't realize that they were zinc until a few years ago. Zamak 3 could be used...
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Inventor
welfab
Feb 19, 2013 1:46 am
You might want to check with your local foundries to see how "Alum-Bronze" is made. Makes beautiful golden casting. Grandpa Bill...
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Pierre Coueffin
darkblood_
Feb 19, 2013 1:44 am
When I need to make a stage prop that looks like brass, but cannot be for reasons of cost or weight, I use steel and good quality spray paint. [Non-text...
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Stephen Lovely
rhodes_shaper
Feb 19, 2013 12:43 am
I did a small investment casting a couple years ago where I melted some pennies in a small porcelain crucible using an everyday propane torch. I just weighed...
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StoneTool
owly055
Feb 18, 2013 7:20 pm
You're right Carl............ I have a fairly large furnace, and melting a tiny quantity of bronze in it seems a bit silly...Crucibles are cheap enough, tongs...
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Carl
carl_r2000
Feb 18, 2013 6:24 pm
http://www.lmine.com/mm5/merchant.mvc?Screen=CTGY&Store_Code=LMS&Category_Code=fused  Howard:Seems like a lot of work to save $11.99 plus shipping. The fused...
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StoneTool
owly055
Feb 18, 2013 5:54 pm
My project involves two small parts, only about a pound total, and I'm toying with the idea of making a small reverb style furnace (no crucible), the burner...
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StoneTool
owly055
Feb 18, 2013 2:34 pm
Thanks everyone for the ideas. Looks like I'm stuck with red brass, or experimenting with electroplating to get the desired color. I have just two pieces to...
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Rupert
rwenig2
Feb 18, 2013 1:50 pm
hello Howard, Wish I could help you as the info is interesting to me too. I did a Google search on yellow metal. The closest I found was "Muntz metal" which is...
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Jeshua Lacock
jeshuala
Feb 18, 2013 8:05 am
... Thanks for the interesting post Tim. This is likely no help to the OP because ferrotitanum has a higher melting temperature, but I recall the ferrotitanum...
42573
tmoranwms
Feb 18, 2013 5:51 am
I don't know too much about the exact mechanism behind metal color. Something called "plasma frequency", but I don't know how it's calculated. In short: the...
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Nelson Collar
nel2lar
Feb 18, 2013 3:32 am
The only way to get a brass like colour would be use a metal or something that would yellow-bronze. I do not know of anything you can use. I put about 10%...
42571
StoneTool
owly055
Feb 18, 2013 1:58 am
Does anybody know of any low temp castable "yellow metals", or of colorants that can be used to give a coppery color to something like aluminum or zamak (other...
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Rupert
rwenig2
Feb 13, 2013 10:12 pm
Hello Fred, It is best to condition the crucible as per the instructions that come with a new one. I haven't found any problems with the alloy separating...
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fred eisner
imsteamer21
Feb 13, 2013 7:23 pm
hi nelson - that is what i intend to do - im calling it an ingot but it will be a block large enough for me to machine into a useable piece - i have around 20...
