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Magnetic bronze

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Garry Coles	30/09/2022 14:04:22
121 forum posts 100 photos	Hi. Many years ago I obtained two 12 in X 1 in diameter bronze looking round bar. I didn't know what sort of bronze it was, so it was not going to be used on any thing important. I thought it would come in handy for something one day. And today it did. I am machining up some pipe flanges for a globe valve. The bar machines very nicely. Now, when I was cleaning the lathe afterwards I noticed that a magnet that I had close by had some of the bronze on it. On closer inspection I found it to be only very slightly magnetic. Can someone enlighten me as to what this sort of bronze is. Thanks Garry
Michael Gilligan	30/09/2022 14:39:51
23121 forum posts 1360 photos	Garry Search here LINK for magnetic bronze and all should be revealed https://copper.org/search.php?q=&submit=Search MichaelG. . ”Thus, for example all alloys up to 80% Ni are paramagnetic at 150 ºC while at 20 ºC alloys containing more than 68.5% nickel exhibit ferromagnetic behaviour.” Edited By Michael Gilligan on 30/09/2022 14:41:17
SillyOldDuffer	30/09/2022 14:51:24
10668 forum posts 2415 photos	If it's magnetic, and not exotic, probably a Bronze with Iron, Nickel or Cobalt in it. Could be CA104 ; it's an Aluminium Bronze containing about 5% Iron and 5% Nickel. Good stuff judging by the specification. Dave
Garry Coles	30/09/2022 15:59:13
121 forum posts 100 photos	Thanks. Never realised that the bronze family had so many variations.
roy entwistle	30/09/2022 19:56:21
1716 forum posts	Seeing that it's an alloy of copper, anything can be added to it, not necessarily other metals.

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