What is this green stuff?

[Tranona]

So this is a cheap brass prop not bronze at all?
Are these being sold as "bronze"?
Surely this is contrary to consumer law.
If they are copper and zinc (brass) who would knowingly buy one?
Obviously a different ball game then. ....... K

"bronze" is not definitive. There are all sorts of bronze alloys. The one often used for propellers is described as "manganese bronze" which is actually a brass. So no misrepresentation, although "yellow metal" is perhaps a more accurate generic description - which would cover the better alloys as well as visually they look much the same.

 

[Karearea]

So "bronze" can be legitimately be used to describe any copper alloy?
Always thought it must contain tin but my metallurgic knowledge is admittedly dated!