SWISSMETAL (N09 and N9D)     CuNi10Zn42Pb2                            AVINS

Guaranteed composition

N09:   Cu 46.70 - 47.80    Ni 9.20 - 10.00    Pb 1.90 - 2.40    Zn remainder

N9D:  Cu 45.80 - 48.00    Ni 9.00 - 10.40    Pb 0.70 - 1.30    Fe < 0.03     

           Zn remainder

Main technological

characteristics

Free machining nickel silver often replaced by NM2  which has better machinability and higher strength than N09.

N9D is the non-magnetic version of this alloy with higher toughness due to the lower lead content.

Delivery forms

Specialties

Drawn in round sections and profiles

Small diameters in rods and wires, various profiles on request

Physical properties

density (68 °F)

electrical conductivity

thermal conductivity

thermal capacity (specific heat)

coefficient of thermal expansion

magnetic properties

melting interval

color

0.307 lb/in³

4 (7) %IACS

228.8 Btu.in./h.ft².°F

0.100 Btu/lb.°F

0.000011 in/in. °F

non magnetic

1697 – 1724 °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

capacityfor polishing

capacity for galvanic plating

N09: 85  N9D:60

N09: 85  N9D:60

N09: 90  N9D:65

poor-middle

good

good

middle

middle

570°F - 4h at temp.

1200°F - 1h at temp.

good

good

Typical mechanical

properties for rods

modulus of elasticity = 18,416,473PSI

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 into contact with material of lower standard potential such as, for example, steels containing less than 13% chromium.

Typical applications

•  various spare parts for watches

•  N9D especially recommended for barrels

•  spare parts for music instruments