79NM pipe
Technical characteristics
Permalloys are characterized as iron-nickel alloys that have a relatively high permeability in weak fields. Permalloys are divided into low-nickel alloys (that contain to 50% of Ni) and high-nickel alloys (that contain to 82% of Ni) by their composition. A precision grade 79NM relates to the latter and contains 78.5 — 80% of Ni. Belonging of every alloy to concrete group depends on a degree of manifestation of electromagnetic properties. 79NM grade has a lower conductivity but a higher corrosion resistance. It must be alloyed with such elements as chrome, copper, molybdenum for strengthening of electromagnetic properties. A smelt is done in vacuum or inert gas environment. Sheets and strips are cold-pressed with the further annealing for increasing magnetic properties
Percentage composition of alloy GOST 10994−74
| S |
P |
Ti |
Al |
C |
Cu |
Si |
Mn |
Mo |
Fe |
Ni |
| ≤0,02 |
≤0,02 |
≤0,15 |
≤0,15 |
≤0.03 |
≤ 0.2 |
0.3 — 0.5 |
0.6 — 1.1 |
3.8 — 4.1 |
13.8 — 16.8 |
78.5 — 80 |
Application
Due to its small magnetostriction, an actual alloy is used in high-accurate units that have stable characteristics in a variable magnetic field. It possesses a small variation of electrical resistance (not more than 5%), which are defined by force and magnetic orientation. This alloy is used for manufacturing the transformer flakes, elements of magnetic recording heads, cores of small-sized transformers and contactless relays.
Physical characteristics
| Description |
Identification |
| Modulus of elasticity of first kind [MPa] |
E |
| Heating capacity of material (or coefficient of conductivity for heat) [V/(m/degree] |
l |
| Required temperature for obtaining of actual features, [Degree] |
T |
| Linear expansion thermal coefficient [1/degree] (range of temperatures 20°С) |
a |
| Specific electrical resistivity [Оhm-mm2/m] 0,81 |
R |
| Density of a material, [kg/m3] |
r |
| Specific heat of a material [J/(kg/degree)] (range of temperature 20°С) |
C |
Magnetic characteristics
| Description |
Identification |
| Coercive field (not higher) [A/m] |
Hc |
| Magnetic inductive capacity (not higher) [mH/m] |
Umax |
| Saturation induction 2 T [V/kg] |
P1.0/50 |
| Magnetic T induction, magnetic field strength no less than 100, in magnetic field, [A/m] |
B100 |
Mechanical characteristics
| Description |
Identification |
| Short resistance to rupture [MPa] |
sv |
| Flow limit (proportional limit load) for permanent change of form [MPa] |
sT |
| Percent elongation at fracture [ % ] |
d5 |
| Contraction ratio [ % ] |
y |
| Impact hardness [ kJ/m2] |
KCU |
| Brinell hardness [MPa]-1 125−195 |
HB |
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«Auremo» company is 79NM pipe supplier of precision alloys to countries of Eastern and Central Europe. All products are certificated. A quality is guaranteed by rigorous technology compliance of manufacture. Our managers are always ready to answer any questions and to give a knowledgeable assistance. You can easily buy 79NM pipe by connecting us with a convenient way for you. Phone numbers, e-mail addresses of the closest company’s offices are located in section «Contacts». Order a service «Call-back» and our manager will help you to choose products that will fit your individual requirements. Pipe 79NM is always in stock. 79NM pipe price depends on an order quuantity and additional conditions of supply.
79NM pipe supplier
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