Brass: refers to a metal-like substance with copper as the base metal and zinc as the main alloying element.
There are many types of brass, among which copper-zinc binary alloy is the simplest kind of brass, so it is called simple brass or ordinary brass.
General grades are H62 (62% copper) H65 (65% copper) H70 .H90 and so on.
In addition to ordinary brass, there are lead brass (such as HPb59-1), iron brass, aluminum brass, tin brass and so on.
Cupronickel: Refers to a metal-like substance with copper as the base metal and nickel as the main alloying element.
There are also many types of white copper, including ordinary white copper (such as B10, B30, B40, etc.), and zinc white copper (BZn15-20, etc.)
Bronze: Refers to an alloy with copper as the base metal and non-zinc and non-nickel as the main alloying elements, that is, except for brass and white copper, it is all bronze.
There are also many types of bronze, including tin bronze (tin phosphor bronze is one of them, which is what you call phosphor bronze, silicon manganese bronze, aluminum bronze, chrome bronze, etc. The phosphor bronze you mentioned refers to copper phosphorus alloys, from Theoretically, it is also a kind of bronze. It is mainly used in the welding industry. It is difficult to process. It is hard and brittle.