There are a number of references in the 1915 Treatise on Ammunition to fuze bodies being made of Class "A" Metal. A Google and Wikipedia search came up with modern definitions that obviously have nothing to do with the 1915 meaning. Can anyone help with definitions and/or references? Depotman
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WW1 British Fuze Material - Class "A" Metal
- Thread starter Depotman
- Start date
Thanks Roger, I think that's probably the right answer, although I've never heard of brass or bronze having even trace lead in the mix? Depotman
"Metals designated by "classes" are copper alloys, the compositions of which are left to the discretion of the makers providing the metals conform to tests" The tests are an assessment of Yield and Tensile strength.
Annealing some brasses can greatly change their properties compared to the 'cold-rolled' form.
The No. 100 fuze used a brass of approx. 60% copper, 40% zinc.
Lead is often added to brass to make it more machineable. Brass C360 contains 3% Lead.
TimG
Annealing some brasses can greatly change their properties compared to the 'cold-rolled' form.
The No. 100 fuze used a brass of approx. 60% copper, 40% zinc.
Lead is often added to brass to make it more machineable. Brass C360 contains 3% Lead.
TimG
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Thanks Tim, that info adds a lot to the info in the 1915 Treatise, as there are also occasional references to 'lead-free' metals used in various fuzes. Depotman.