Alloy 68NKHVKTJU (ЭП578)
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Alloy 97NL (EI996)
Alloy 95NLM (EI996M)
Alloy 95NLVF (EI996V)
Alloy 68NKHVKTU (EP578)
Alloy 46NKhT (EP619)
Alloy 45NHT (EP218)
Alloy 44NCTU
Alloy 42NKhTUA (H41KhTA)
Alloy 42NKHTU (42NKHTUA)
Alloy 40KHMVTU
Alloy 36KhNTU (EI702)
Alloy 36NKhTYu8M (EP52)
Alloy 36NKhTU5M (EP51)
Alloy 36NKhTU (EI702)
Alloy 21NKMT (VES-130)
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Designation
| Name | The value |
|---|---|
| Designation GOST Cyrillic | 68НХВКТЮ |
| Designation GOST Latin | 68HXBKTJu |
| Transliteration | 68NHVKTYu |
| The chemical elements | 68NiCrВCoTeAl |
| Name | The value |
|---|---|
| Designation GOST Cyrillic | ЭП578 |
| Designation GOST Latin | EP578 |
| Transliteration | EhP578 |
| The chemical elements | - |
Description
Alloy 68NKHVKTJU used: for the manufacture of elastic sensing elements, operating at temperatures from -196 °C to +500 °C; details provocatively elements Aviapribor and automatic aviation systems.
Note
Alloy non-magnetic corrosion-resistant dispersion-hardened with a temporary resistance 1375- 1570 MN/m2 (140−160 kgf/mm2), with the normal elasticity modulus 196000- 216000 MN/m2 (20000- 22000 kgf/mm2).
Standards
| Name | Code | Standards |
|---|---|---|
| Classification, nomenclature and general norms | В30 | GOST 10994-74 |
| Tapes | В34 | TU 14-1-4456-88 |
| Sectional and shaped rolling | В32 | TU 14-1-4470-88, TU 14-11-245-88 |
| Steel alloy wire | В73 | TU 14-1-4488-88 |
Chemical composition
| Standard | C | S | P | Mn | Cr | Si | Ni | Fe | Cu | Al | V | B | Ti | Nb | W | Ce | Co |
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
| GOST 10994-74 | ≤0.05 | ≤0.01 | ≤0.015 | ≤0.4 | 18-20 | ≤0.4 | The rest | ≤1 | ≤0.07 | 1.3-1.8 | ≤0.2 | 0.003 | 2.7-3.2 | ≤0.2 | 9-10.5 | 0.05 | 5.5-6.7 |
Ni is the basis.
According to GOST 10994-74, the calculated content of boron and cerium is indicated.
According to TU 14-1-4470-88 and TU 14-1-4456-88 the chemical composition is given for the alloy 68NHVKTYU-VI (EP578-VI). The residual content of niobium and vanadium is not more than 0.20% of each. Boron and cerium are introduced by calculation.
According to GOST 10994-74, the calculated content of boron and cerium is indicated.
According to TU 14-1-4470-88 and TU 14-1-4456-88 the chemical composition is given for the alloy 68NHVKTYU-VI (EP578-VI). The residual content of niobium and vanadium is not more than 0.20% of each. Boron and cerium are introduced by calculation.
Mechanical characteristics
| Section, mm | sT|s0,2, MPa | σB, MPa | d5, % | d4 | y, % | kJ/m2, кДж/м2 | Brinell hardness number, MPa | HRC | HV, MPa |
|---|---|---|---|---|---|---|---|---|---|
| Cold-rolled steel strip on the other 14-1-4456-88. Delivery condition - Dispersion hardening in a stepwise mode: 800 °C for 1 hour, 700 °C - 2 hours, air cooling | |||||||||
| - | - | ≥1470 | - | ≥1 | - | - | - | ≥46 | ≥460 |
| - | - | ≥1370 | - | ≥1.5 | - | - | - | ≥43 | ≥430 |
| The bars as supplied on the other 14-1-4470-88. Quenching in water from 1060-1100 °C + the Dispersion hardening at 790-810 °C (aging for 3.0-4.5 hours) + Dispersion hardening at 690-710 °C (extract 4-6 hours) | |||||||||
| 60, 65, 70 | ≥785 | ≥1180 | ≥15 | - | ≥20 | ≥396 | 321-415 | - | - |
| 8-55 | ≥835 | ≥1230 | ≥18 | - | ≥25 | ≥539 | 321-415 | - | - |
| 60-100 | ≥785 | ≥1180 | ≥15 | - | ≥20 | ≥396 | 321-415 | - | - |
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 |
| d5 | Elongation after rupture |
| d4 | Elongation after rupture |
| y | The relative narrowing |
| kJ/m2 | Toughness |
| HRC | Rockwell hardness (indenter diamond spheroconical) |
| HV | The Vickers hardness |
