Bronze question

[darrin1200]

This is also a little follow up from the Thread 'Brass $5 pound'
https://canadianhobbymetalworkers.com/threads/brass-5-pound.11284/

I was looking at the second rod I have, and found a readable marking.
C63000


Which leads me to believe it is Nicle-Aliuminum Bronze rather than brass.

I use 510 Phosphor Bronze, for my accent trim rings in my pens, because it takes longer to oxidize (patina). Especially with a coat of Renaissance Wax.


What is the Nickle-Aluminum like. I will brobably do a small trial, but thought I would ask here as well.

 

[whydontu]

C63000 doesn’t develop patina. Used for valve components, marine drive shafts, propellers. Tends to chatter under machining, produces a fine spray of needle-sharp swarf.

 

[darrin1200]

I didn‘t know that about the the C63000. It turned very similar to the Phosphor `bronze im using. The yellow brass I have (unk alloy) turned more like dust.

I made three pieces, polished and rubbed with Rennaisance Wax.
I’ll try to take a picture each week, and see how the patinas develop.

I like the gold tone of the phosphor bronze for my use.

 

[historicalarms]

Put those pieces above a "preferably" propane or even a nat gas or wood stove and you will accelerate the "tarnish" quite quickly compared to just open air waiting, that will take for ever.

 

[darrin1200]

Thats what I’m hoping to compare. I want it to take a long time, as I don’t want the pens to tarnish to quickly. I’m curious about the comparison.

 

[whydontu]

Everything you ever wanted to know about C63000. Under normal conditions it will not tarnish or change colour. Without high temperature >2000* exposure it will maintain the same golden colour.

https://copper.org/applications/marine/nickel_al_bronze/pub-222-nickel-al-bronze-guide-engineers.pdf

 

[darrin1200]

Thanks. A little beyond me, but I will give it a read. A quick look and it appears it might be better for my purposes, than the phosphor bronze. I’m really after the “gold“ look. But it is very tricky to bend the thin ph bronze. Needs to be heated so it won’t crack.