davedude
Member
- Joined
- Apr 5, 2011
- Messages
- 5
ive recently aquired some contacts... i was thinking of melting them as they are but disolving them in nitric seems to be a better option by what i have read. i was just wondering how would i get the nitric (im in ontario canada) and what would happen to the nickel if i did melt it??
heres some info on the composition of the contacts.
heres some info on the composition of the contacts.
OVERVIEW
Silver-nickel contact materials are used typically in low and medium power applications. Switches, mini-relays and low power contactors are typical applications for silver-nickel. There is some use of silver-nickel in AC circuit breakers. Contact resistances are relatively low and remain stable over time when compared to silver-copper alloys. As the nickel content increases, the contact resistance increases. The increase in the nickel content also improves the materials resistance to arc erosion. One disadvantage of silver-nickel is its diminishing arc erosion properties over 100 amps.
AVAILABILITY
Silver-nickels are produced through powder metallurgy processes. Compositions for these materials range from 5% nickel to 30% nickel. The lower concentrations of nickel can be manufactured into strip and wire products for further fabrication into contact rivets, clad products and discrete contacts. The materials with the higher nickel concentrations are produced as discrete contacts, through unit compaction processes. The discrete contacts are often supplied with braze alloy flushed to the brazing face.
MATERIALS
Composition
Hardness
Density
Conductivity
(weight %)
(R'well)
(g/cc)
(IACS %)
Silver-Nickel
WN51 Ag95/Ni5
F 32*
10.3
94
WN101 Ag90/Ni10
F35*
10.2
87
WN151 Ag85/Ni15
F40*
10.1
80
SN15PSR Ag85/Ni15
F50*
10.0
68
SN30PSR Ag70/Ni30
F42*
9.6
55