SWISSMETAL (N29)         C76300                                                      AVINS 

Guaranteed composition

Cu 60.70 - 62.30     Pb 0.80 - 1.30     Ni 17.20 - 18.40    Zn remainder

Main technological characteristics

Free machining nickel silver with very high toughness and high corrosion       resistance

Delivery form

Specialties

Drawn in round, square, rectangular. Profiled cross sections upon request.

 mainly small diameters in rods and wires in coils (max 1/4")

Physical properties

density (68°F)
electrical conductivity
thermal conductivity
thermal capacity (specific heat)
coefficient of thermal expansion
magnetic properties
melting interval
color

0.316 lb/in³
6 %IACS
228.8 Btu.in./h.ft².°F
0.10 Btu/lb.°F
0.0000094 in/in. °F
non magnetic
1940 – 2012 °F
silver

Capacity for forming/machining

machinability rating (free cutting brass = 100)
tool life (free cutting brass = 110)
tendency for short chips 
(free cutting brass =90)
capacity for cold working
capacity for hot working
capacity for soft soldering
capacity for hard soldering
capacity for welding
thermal stress relief
annealing
capacity for polishing
capacity for galvanic plating

middle (50)
middle (50)
middle (50)

good
low
good
low
low
572°F - 4h at temp. 1290°F - 1h at temp. good
good

Typical mechanical properties for rods

modulus of elasticity =  17,400,000 PSI

Corrosion resistance

stress corrosion
industrial atmosphere
rural atmosphere
marine atmosphere
chlorine (humid)
vinegar
fresh water
high relative humidity and elevated temperature sea water

slightly sensitive
good
good
good
poor
middle
good
good
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

• spare parts for music instruments
• writing instruments
• spare parts for telecommunications
• components for eyeglasses

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