For a reed plate for accordion - I have a piece of Russian made "latun'" - L87 type. When trying to match it to American brass I tried different types from McMaster, including "engravers brass" - which is the hardest they offer. Still Russian material is harder ... so I was wondering may be what I have is a bronze alloy (it is somewhat darker in hue compared to brass). It is important to have right hardness as I punch out reed slots on a fly wheel press
How does say 220 bronze alloy compare to brass in terms of hardness ? I need to have a copper alloy with hardness of say 7075 Al (150 brinell or thereabout), something w/o any health related issues.
TY Rashid