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Alloy 79NM (80НМ)

Designation

Name The value
Designation GOST Cyrillic 79НМ
Designation GOST Latin 79HM
Transliteration 79NM
The chemical elements 79NiCu
Name The value
Designation GOST Cyrillic 80НМ
Designation GOST Latin 80HM
Transliteration 80NM
The chemical elements 80NiCu

Description

Alloy 79NM used: for the manufacture of small cores of transformers, chokes and relays, working in weak magnetic fields, screens; small thickness (0,05−0,02 mm) — for the cores of pulse transformers, magnetic amplifiers and contactless relays.

Note

Alloy with high magnetic permeability in weak fields at saturation induction of 0.65−0.75 T.
Alloy after heat treatment with slow cooling from +600 °C is characterized by a slight change of properties in the climatic temperature range.

Standards

Name Code Standards
Classification, nomenclature and general norms В30 GOST 10160-75, GOST 10994-74
Sheets and stripes В33 TU 14-1-1204-74
Tapes В34 TU 14-1-1306-75, TU 14-1-1708-76, TU 14-1-1740-75, TU 14-1-2664-79
Metal forming. Forgings В03 TU 14-1-1530-75
Bulls. Blanks. Slabs В31 TU 14-1-1833-76, TU 14-1-2545-78, TU 14-1-3904-84
Sectional and shaped rolling В32 TU 14-1-2830-79, TU 14-131-851-92, TU 14-11-245-88
Steel alloy wire В73 TU 14-1-468-73

Chemical composition

Standard C S P Mn Si Ni Fe Cu Al Ti Mo
TU 14-131-851-92 ≤0.03 ≤0.02 ≤0.02 0.6-1.1 0.3-50 78.5-80 The rest ≤0.2 ≤0.15 ≤0.15 3.8-4.1
TU 14-1-1708-76 ≤0.03 ≤0.006 ≤0.02 0.4-0.6 ≤0.25 79.4-80.6 The rest - - - 5-5.4
Ni is the basis.
According to GOST 10994-74 the chemical composition is given for the alloy 79NM.
According to TU 14-1-1708-76 the chemical composition is given for the alloy 80NM.
According to TU 14-1-2830-79 the chemical composition is given for the alloy grade 79NM-IP.

Mechanical characteristics

Section, mm sT|s0,2, MPa σB, MPa Brinell hardness number, MPa
The tape is in delivery condition (transverse specimens)
≥980 ≥1030 120-210

Description mechanical marks

Name Description
Section Section
sT|s0,2 Yield strength or limit of proportionality with a tolerance for residual deformation of 0.2%
σB Limit short-term strength

Physical characteristics

Temperature r, кг/м3
20 8600

A description of the physical symbols

Name Description
Е The normal elasticity modulus
r Density
l Coefficient of thermal conductivity

Technological properties

Name The value
Features of production Tape on the other 14-1-1708-76 supplied in cold-worked condition without heat treatment.

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