Product \ Round \ Nm2 \ CuNi7Zn39Pb3Mn2

CuNi7Zn39Pb3Mn2

EN/DIN

DIN 2.0771

Free machining nickel silver NM2 alloy contains 2.4-3.0% Pb. It has an excellent workability. It can be easily extruded warm to make shaped rods or hot form forging. However, the cold forming ability is somewhat limited. High powers can be obtained reproducibly. It has a gray silver color with a touch of yellow.

NM2 alloy is also known with EN CuNi7Zn39Pb3Mn2, DIN CuNi7Zn39Mn5Pb3 standards. Ballpoint pen tips are used in the production of eyewear industry, watch industry, lock pins.


Electrical Properties

Electrical Resistance

0.105  Ω.mm .m

Magnetic permeability

-

Magnetic susceptibility

Non magnetic

 

Process Properties

Machinability

good

Hot Forming

medium

Cold Forming

medium

 

Thermal Recovery

Softening Annealing

790 ℃

15-60 min

Stress Relieving Annealing

365 ℃

3 h

 

Thermal Recovery

Softening Annealing

600-700 ℃

1-3 h

Stress Relieving Annealing

300-400 ℃

1-33h  

 

Descriptive Features

Alpha Phase Crystal Structure

Below cph, 815 ° C

Beta Phase Crystal Structure

Above bcc, 999 ° C

 

Optical Properties

Emissivity(0-1)

0.34

Reflection Coefficient, Visibility(0-1)

0.57

 
Dimensions  mm

CuNi7Zn39Pb3Mn2

Ø
0.800
Ø
1.000
Ø
1.200
Ø
1.300
Ø
1.400
Ø
1.600
Ø
1.900
Ø
2.000
Ø
2.500
Ø
3.000
Ø
3.500
Ø
4.000
Ø
4.500
Ø
5.000
Ø
6.000
Ø
7.000
Ø
8.000
Ø
10.00
Ø
11.00
Ø
14.00
Ø
16.00
Ø
19.00
Ø
22.00

 

NM2 - Chemical Composition

Cu Ni Sn Fe Mn ZN O Pb P

49.7

max

7.6

max

-

-

2.8 

max

Bal. -

3.0 

max

-

 

Physical Properties

NM2 otomatik nikel gümüşü,% 2.4-3.0 Pb ile alaşımlıdır. Mükemmel işlenebilirliğe sahiptir ve sıcak pres veya sıcak dövme olabilir. Öte yandan, soğukta şekil değiştirebilirlik o kadar iyi değil. Yüksek mukavemet değerleri elde edilebilir. Sarımsı bir belirti ile gümüş grisi bir renge sahiptir.