"Solder and bithmus" Topic
7 Posts
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| MikeMonaco | 27 Nov 2018 12:33 p.m. PST |
OK here's a question. I have a kilogram of bithmus and a large supply of 60/40 lead/tin solder. The lead/tin is not bad for casting in PA and similar molds, but I was thinking adding some bithmus would help the metal fill the cavities better, since it expands on setting. Has anyone tried this and what would a good ration of bithmus to solder be? TIA |
| Winston Smith | 27 Nov 2018 12:39 p.m. PST |
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| MikeMonaco | 27 Nov 2018 12:51 p.m. PST |
Yes, apparently I type with a lisp. |
martin goddard  | 27 Nov 2018 1:43 p.m. PST |
I advise against using any bismuth whatsoever. It will make the castings VERY brittle. Up to you whether this information useful or not. I am sure others here are more expert. |
| FusilierDan | 27 Nov 2018 7:02 p.m. PST |
If you do facebook you could ask on this group
link |
| Rich Bliss | 28 Nov 2018 9:57 a.m. PST |
You can start with about 2% and work your way up from there. I suggest setting up an experiment plan, since casting temperature and mold conditions will also effect the results. |
| Steve Roper | 28 Nov 2018 6:06 p.m. PST |
I've used it at times for small parts that had trouble accepting detail. Here is the reference I used: link |
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"goes large."