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  SWISSMETAL  (M18)                              C75900                                                  AVINS

Guaranteed composition
Cu 61.20 - 62.80        Ni 17.60 - 18.40        Zn remainder

Main technological characteristics
Nickel silver with very high toughness and high corrosion resistance

Delivery form 

Specialties
drawn in round cross section 

mainly small diameters in rods and wires in coils (max 1/4")
Physical properties density (68°F) 0.316 lb/in³
electrical conductivity 6 % IACS 
thermal conductivity  228.8 Btu/lb. °F
thermal capacity (specific heat) 0.10 Btu/lb. °F
coefficient of thermal expansion 0.0000094 in/in. °F
magnetic properties non magnetic
melting interval  1940 - 2012 °F
color silver
Capacity for  machinability rating (free cutting brass = 100) very low (50)
forming/machining tool life (free cutting brass = 110) very low (50)
tendency for short chips (free cutting brass = 90) very low (50)
capacity for cold working very good
capacity for hot working low
capacity for soft soldering good
capacity for hard soldering low
capacity for welding low
thermal stress relief 572 °F - 4h at temperature
annealing 1290 °F - 1h at temperature
capacity for polishing good
capacity for galvanic plating very good
Typical mechanical  dimensions Ø 0.020 - 0.200 in. annealed ½ hard (30 %) hard (75 %)
properties for wires tensile strength  Rm    [PSI] 58,000 94,000 108,000
yield strength   Rp0.2  [PSI] 19,000 91,000 106,000
elongation         A2"     [%] 45 3 1
hardness                   [Vickers] 90 200 230
modulus of capacity = 17,400,000 PSI
Corrosion resistance stress corrosion not sensitive
industrial atmosphere  good
rural atmosphere good 
marine atmosphere good
chlorine (humid) poor
vinegar middle
fresh water good
high relative humidity and elevated temperature good
sea water good
galvanic: Copper alloys present a high and positive standard potential of corrosion. Consequently, there is a risk of galvanic corrosion if they enter into contact with material of lower standard potential such as, for example, steels containing less than 13 % chromium.
Typical applications
 		  
  • Mainly components for eyeglasses.


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Avins Industrial Products Corporation   2 North Road    Warren   NJ  07059    USA