What is the metal composition of "white bronze" and "silicon bronze" which are used in door hardware industry?

Question

White bronze is an alloy of copper, manganese, nickel, and zinc metal producing a silver color but what are the percentage of these metals. Similarly Silicon bronze is an alloy of copper, silicon, and zinc metal creating a coppery-gold color, but what are the percentage of these metals in forming an alloy.

Answer 1

White (percent by weight)

Copper: 48.9 - 51.2

Tin:...... 26.8 - 28.5

Zinc: ... 21.9 - 22.4

Silicon (percent by weight)

Copper: 96 - 97.7

Silicon:  3.0 - 1.5

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