Alloy 81NMA
Alloy 68NM
Alloy 47NK
Alloy 49K2F (EP207)
Alloy 49K2FA
Alloy 49K2FN
Alloy 49KF
Alloy 49KF2
Alloy 50H
Alloy 50NCHS
Alloy 50ÕÍS
Alloy 64H (65H)
Alloy 45H
Alloy 74NMD (EP233)
Alloy 76NCD
Alloy 77NMD (EP264)
Alloy 79H3M
Alloy 79NM (80NM)
Alloy 80H2M
Alloy 80NCHS
Alloy 81NMA
Alloy 82N6KhB (H32Kh6Yu)
Alloy 83NF
Alloy 33H2X
Alloy 10Su
Alloy 12Yu
Alloy 16X
Alloy 16YuX (16YuX)
Alloy 27KH
Alloy 30NG (EP456)
Alloy 31H3X
Alloy 31H4X
Alloy 31H6X
Alloy 31H8X
Alloy 40NKM
Alloy 33H5X
Alloy 34H2X
Alloy 34NKM
Alloy 35H2X
Alloy 35NKHSP
Alloy 36KNM
Alloy 36N11H (EP297)
Alloy 36NK11
Alloy 40H
Designation
| Name | The value |
|---|---|
| Designation GOST Cyrillic | 81НМА |
| Designation GOST Latin | 81HMA |
| Transliteration | 81NMA |
| The chemical elements | 81NiCu |
Description
Alloy 81NMA used: for the manufacture of cores of magnetic heads, small transformers, chokes, relays, flaw detectors, magnetic shields, ferroprobes for use in electronic equipment of high sensitivity.
Note
The alloy with the highest value of magnetic permeability in weak permanent and variable magnetic fields with low sensitivity to mechanical stress and increased strength. Depending on the final heat treatment σIn can be from 640 N/mm2 (65 kgf/mm2) to 1270 N/mm2 (130 kgf/mm2).
Standards
| Name | Code | Standards |
|---|---|---|
| Classification, nomenclature and general norms | В30 | GOST 10160-75, GOST 10994-74 |
| Sectional and shaped rolling | В32 | TU 14-11-245-88 |
Chemical composition
| Standard | C | S | P | Mn | Si | Ni | Fe | Ti | Mo |
|---|---|---|---|---|---|---|---|---|---|
| GOST 10994-74 | ≤0.01 | ≤0.01 | ≤0.01 | ≤0.35 | ≤0.1 | 80.5-81.7 | The rest | 2.5-3.3 | 4.7-5.2 |
Ni is the basis.
