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.