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| Joined: | Thu Apr 16th, 2009 |
| Location: | Arctic, Norway |
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Also, the specs that Roland had posted are from a French company, so we should also be wary of french CuSn8? (not saying that is what he is using)
http://www.frwcarobronze.fr/certificat.htm?lang=en
By the way, I do not know Roland, other than I bought a buckle from him a few months back, and it has not pulverized yet..
oagaspar wrote:Craustin1 wrote:Here is the Chemical composition of CuSn8:...you left out the company name for your google search... ALB Copper Alloys Co., Ltd. Xiamen, China Tel: +86-592-5631276 Fax: +86-592-5750151 Email:Lindy.Chen AT alb-copperalloys.com Please visit our website:http://www.alb-copperalloys.com...CHINA aka Chinese Bronze which all the other companies who revealed the bronze indiscretion to begin with had in their watches/Benarus/Helson/Zenton...brass because of the zinc in it...Roland is claiming Germany! and this is the composition of true CuSn8 bronze...
Chemical Composition:
Sn: 7.50-8.50%
P: 0.03-0.35%
Zn: 0.20% Max.
Fe: 0.10% Max.
Pb: 0.05% Max.
Zn: Balance
CuSn8 - UNS.C52100 Phosphor Bronze Alloys, which is a 8% tin bronze distinguished by a very good combination of strength and electrical conductivity. It is used for connector and current-carrying springs in contacts. Among the 4-8% tin bronze C52100 exhibits the lowest electrical conductivity, the highest reachable strength is significantly higher than C51100 and C51000 and C51900. By means of an additional further tempering after the cold forming process the bendability can be further improved.
In addition, it has better corrosion resistance and good sliding properties. C52100 is used for springy components and sliding elements when increased strength and wear-resistance are required.
From what I read, in general most Bronze is defined by being a metal alloy, with it's primary composition that of Copper... CuSn8 would then be also a copper alloy. I think we are now just splitting hairs..
Cu : 91,5
P : 0,2
Sn : 8,5
and even purer it would be 8% tin and 92% copper...
This certificate is issued by the Norwegian Veritas: Who knows why when it's a French addressed company and the French Veritas would be valable as well.
So there is importation there: Not necessary from Norway!
This certificate was also issued the 18 march 2009 and expired the 17 march 2012.
Any certification is just as good as butt paper the very first minute after midnight over the expiration's date.