Replies

1. 
   dirtstirrer | Jan 13, 2004 09:19am | #1

   Hey Chuck, I just found this out the other day.  Gunmetal is a mix of copper and tin, and was used in planes like the old Millers Patent planes.  Some alloys have a few other trace metals in them, but those are the primary components.

   aka Steve
2. 
   UncleDunc | Jan 13, 2004 09:25am | #2

   Ditto Dirt Stirrer. Here's a chart with a bunch of copper alloys.

   http://www.zedlina.com.au/copper%20specifications1.htm

3. 
   rslatm | Jan 13, 2004 03:46pm | #3

   Basically it's a form of bronze with a specific alloy composition.
1. 
   UncleDunc | Jan 13, 2004 05:23pm | #4

   >> Basically it's a form of bronze with a specific alloy composition.

   Not very specific. The references I found yesterday described a range of alloys.

1. 
   10fingers | Jan 14, 2004 01:19am | #5

   Thanks for the info.  I never would have known if I hadn't asked.

4. 
   eddiefromAustralia | Jan 14, 2004 02:47am | #6

   Chuck,

   I've got my metallurgy texts packed away, but here's the basic specs.

   http://brasscastingscoppercastings.wronger.com/gunmetal.htm

   As Uncle Dunc said, a range of compositions, based around the copper/tin alloy base.

   Cheers,

   eddie