 |
Recent Books by Forum Members |
 |
|
|
|
|||||||
 |
|
|
Thread Tools | Display Modes |
|
#1
20-11-08, 08:15 AM
|
||||
|
||||
Gilding metal v Brass
Chaps,
A separate thread to cover this topic which has been raised in several areas. The difference between gilding metal and brass is the proportions of copper and zinc in them. They all contain the same component metals but brass has more copper. The most common brass is nominal 70% copper 30% zinc. It is also known as "cartridge brass". Copper with 5 or 6% zinc is called "gilding metal". Source is: http://www.eng-tips.com/viewthread.c...=186077&page=1 Alan 
|
|
#2
20-11-08, 10:20 AM
|
||||
|
||||
|
Quote:
I am not a chemist but is there a (chemical or otherwise?) way of distinguishing the 2 in any way? I know that a high copper content can give way to verdigris etc - but this takes time...... david
|
|
#3
20-11-08, 11:59 AM
|
||||
|
||||
|
Quote:
Brass: 67% copper 33% zinc. Gilding metal: 86.7% copper 13.3% zinc by weight. Army Clothing Department Pattern No. 4480/1897. Used in place of brass from 1896. German Silver (called White Metal from ca. 1906): 64.5% copper 16.5% zinc 19.0% nickel by weight. Army Clothing Department Pattern No. 4481/1897. This info from Linaker/Dine Cavalry Warrant Officers' and Non-Commisionned Officers' Arm Badges p. 155. Rgds, fougasse1940.
|
|
#4
20-11-08, 12:09 PM
|
||||
|
||||
|
I share Wright's problem. How do we distinguish between the two metal in a non-chemical testing way? How to distinguish both by looking at them?
Jo
__________________
"There truly exists but one perfect order: that of cemeteries. The dead never complain and they enjoy their equality in silence." - “There are things we know that we know,” “There are known unknowns. That is to say there are things that we now know we don't know. But there are also unknown unknowns. There are things we do not know we don't know.” Donald Rumsfeld, before the Iraqi Invasion,2003. Age is something that doesn't matter, unless you are a cheese.
|
|
|
|
 |
Linear Mode
