Eastman bells - Gold brass?

[Ace]

I just saw on the Eastman website. Looks like they are offering to make various models with Gold Brass bells. I think that is a cool option, although I think I'd prefer the original yellow brass versions.

https://www.eastmanwinds.com/tubas" target="_blank" target="_blank

Interesting site. I was very surprised that the Sousaphone was not wiped down before photographing it. Careless. There are fingerprint smudges all over the horn.

Ace

[tbonesullivan]

Which "gold brass" is it? the 80:20 or the 85:15? Some makers call 85:15 "gold brass" while others call it "rose brass". Not that it makes a huge difference, but they each have their own characteristics.

[tbonesullivan]

I don't think they use C83600 85 - 5 - 5 - 5 "Red Brass" in any instruments currently. But there are other "red brass" alloys.

These are the usual alloys I've seen, and what foundries actually call them:

Yellow Brass - Cartridge Brass - C26000 - 70 - 30 copper to zinc
Gold Brass - Low Brass - C24000 - Around 80 - 20 Copper to Zinc
Rose Brass or Gold Brass - Red Brass - C23000 - Nominally 85 - 15 Copper to Zinc
Red Brass - Commercial Bronze C22000 - Nominally 90 - 10 Copper to Zinc

None of the current custom trombone makers use 80-20 brass, at least that I know of. I had heard that Bach used it on their bells, but some people have said that isn't true. I also have heard various stories about "bronze" being used in trombones, but no one is sure if that's just "commercial bronze" or a true bronze.

https://www.normans.co.uk/blog/2014/05/ ... nstrument/" target="_blank" target="_blank