SWISSMETAL NM2                      ~C79800                                                     AVINS

Guaranteed composition

Cu 48.5 - 49.7  Ni 6.9 - 7.6  Mn 2.1 - 2.8  Pb 2.4 - 3.0  Zn remainder

Main technological
characteristics

Nickel silver specially developed for free machining

Delivery form 

Specialties

drawn in round sections and profiles

small diameters in rods and wires, various profiles on request

Physical properties

density (20 °C)

electrical conductivity

thermal conductivity

thermal capacity (specific heat)

coefficient of thermal expansion

magnetic properties

melting interval

color

0.303 lb/in³

7 %IACS

228.8 Btu.in./h.ft².°F

0.100 Btu/lb.°F

0.000011 in/in. °F

non magnetic

1670 – 1697 °F

gray-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

good (90%)

good (90%)

good (95%)

fair-poor

good

middle

fair-poor

fair-poor

570°F - 4h at temperature

1200°F - 1h at temperature

good

good

Typical mechanical
properties

modulus of elasticity = 16,676,330 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

middle

middle-good

galvanic:

copper alloys present a high and positive standard potential of corrosion. Consequently, there is a risk of galvanic corrosion if they enter in contact with material of lower standard potential as, for example, steels containing less than 13% of chromium.

Typical applications

• writing instruments

• screws

• fiber optic connectors

• spare parts for eyeglasses

• jewelry