Alloy 97NL (ЭИ996)
Designation
| Name |
The value |
| Designation GOST Cyrillic |
97НЛ |
| Designation GOST Latin |
97HL |
| Transliteration |
97NL |
| The chemical elements |
97Ni |
| Name |
The value |
| Designation GOST Cyrillic |
ЭИ996 |
| Designation GOST Latin |
EI996 |
| Transliteration |
EhI996 |
| The chemical elements |
- |
Description
Alloy 97NL usedfor producing the tape, sanded rods (silverfish) and wire for the manufacture of current-carrying and weight-elastic sensing elements Aviapribor and other devices operating at temperatures up to +300 °C.
Note
Alloy precipitation hardening corrosion resistant with a temporary resistance 1570−1865 MN/m2 (160−190 kg/mm2), with the normal elasticity modulus 196000−206000 MN/m2 (20000−21000 kg/mm2) and low specific resistivity ≤0.35 Ω·mm2/m.
Standards
| Name |
Code |
Standards |
| Classification, nomenclature and general norms |
В30 |
GOST 10994-74 |
| Sectional and shaped rolling |
В32 |
TU 14-1-436-72, TU 14-11-245-88 |
Chemical composition
| Standard |
C |
S |
P |
Mn |
Si |
Ni |
Fe |
Cu |
Al |
Be |
| TU 14-1-436-72 |
≤0.03 |
≤0.01 |
≤0.01 |
≤0.3 |
≤0.2 |
The rest |
≤0.5 |
≤0.1 |
≤0.3 |
2.1-2.5 |
Ni is the basis.
According to TU 14-1-436-72, the chemical composition is given for the 97NL-VI alloy (EI996).
Mechanical characteristics
| Section, mm |
sT|s0,2, MPa |
σB, MPa |
d |
d10 |
HRC |
HRB |
| Tape on the other 14-1-436-72 after quenching in water from 1050-1070 °C |
|
≥393 |
≥785 |
- |
≥30 |
- |
≤90 |
| Tape on the other 14-1-436-72 after quenching in water from 1050-1070 °C and the dispersion hardening at 510±10 °C (extract of 1.5-2.0 CH) |
|
≥687 |
≥1393 |
- |
≥3 |
≥50 |
- |
| Tape on the other 14-1-436-72 after quenching in water from 1050-1070 °C, 35% cold working and dispersion hardening at 510±10 °C (aging of 1.0-1.5 h) |
|
≥1520 |
≥1766 |
- |
≥3 |
≥50 |
- |
| Wire cold-drawn at THAT 14-1-436-72 in the state of delivery: ø>1.5 mm after quenching with posleduyuschaya, ø≤1,5 mm magcaisa after heat treatment in a continuous furnace in the environment of hydrogen with subsequent deformation. The degree of deformation of the wire (shot peening) ø=4,1-7,0 mm is 60-20%, ø≤4.0 mm - 70-80% and polished bars ø=4,0-10,0 in the state of delivery on the other 14-1-436-72 after quenching with subsequent deformation of up to 35% |
|
- |
≥981 |
≥7 |
- |
- |
- |
| Wire cold-drawn at THAT 14-1-436-72 in the state of delivery: ø>1.5 mm after quenching with posleduyuschaya, ø≤1,5 mm magcaisa after heat treatment in a continuous furnace in the environment of hydrogen with subsequent deformation. The degree of deformation of the wire (shot peening) ø=4,1-7,0 mm is 60-20%, ø≤4.0 mm - 70-80% and polished bars ø=4,0-10,0 in the state of delivery on the other 14-1-436-72 after quenching with subsequent deformation of up to 35% + of the Dispersion hardening at 510±10 °C (endurance 2.0 hours) |
|
- |
≥1766 |
≥4 |
- |
- |
- |
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 |
| d |
Elongation after rupture |
| d10 |
Elongation after rupture |
| HRC |
Rockwell hardness (indenter diamond spheroconical) |
| HRB |
Rockwell hardness (indenter steel, spherical) |
