SWISSMETAL     C19150          C97 and  C98                         AVINS

Guaranteed composition

C97: Pb 0.80 - 1.20      Ni 0.80 - 1.20      P 0.15 - 0.30      Cu remainder
C98: Pb 0.40 - 0.70      Ni 0.80 - 1.20      P 0.15 - 0.30      Cu remainder

Main technological characteristics

C97 and C98 are free machining heat-treated leaded nickel copper alloys offering both high mechanical strength and electrical conductivity.

Delivery Form

Specialties

 drawn and aged in round cross sections

 rod (f max 0.600") and wire (f max 0.250") already aged

Physical properties
as aged

density (68°F)
electrical conductivity
thermal conductivity
thermal capacity (specific heat)
coefficient of thermal expansion
relative m measured by field intensity 800A/cm melting interval
color

0.322 lb/in³
>50 %IACS
1699.7 Btu.in./h.ft².°F
0.091 Btu/lb.°F
0.000010 in/in. °F
1.0043
1967 – 1976 °F
red like copper

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

C97 = 70; C98 = 50
C97 = 70; C98 = 40
C97 = 70; C98 = 50
good
middle to weak
good
middle to weak
middle to weak
not possible
1295°F - 5 minutes at temperature
good
very good

Typical mechanical
properties as aged

modulus of elasticity = 17,981,440 PSI

Corrosion resistance

stress corrosion

industrial atmosphere

rural atmosphere

marine atmosphere

chlorine (humid)

vinegar

fresh water

high relative humidity and elevated temperature

sea water

none

good

good

good

poor

middle

good

middle

middle

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 as, for example, steels containing less than 13% of chromium.

Typical applications

C97 and C98 are used  in connectors and spring contacts.

 

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