Alloy ХН68ВМТЮК (ЭП693)
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Designation
| Name | The value |
|---|---|
| Designation GOST Cyrillic | ХН68ВМТЮК |
| Designation GOST Latin | XH68BMTJuK |
| Transliteration | HN68VMTYuK |
| The chemical elements | CrNi68ВCuTeAl |
| Name | The value |
|---|---|
| Designation GOST Cyrillic | ЭП693 |
| Designation GOST Latin | EP693 |
| Transliteration | EhP693 |
| The chemical elements | - |
Description
Alloy ХН68ВМТЮК used: for the manufacture of parts of special equipment and parts for engineering with high durability at high temperature; welded rings and other parts for aviation equipment.
Note
High-temperature Nickel-based alloy.
Standards
| Name | Code | Standards |
|---|---|---|
| Sectional and shaped rolling | В32 | GOST 14955-77, GOST 22411-77, TU 14-1-223-72, TU 14-1-3676-83, TU 14-1-3759-84 |
| Sheets and stripes | В23 | GOST 19904-90 |
| Bulls. Blanks. Slabs | В31 | OST 1 90235-76, OST 1 90421-92, TU 14-1-1214-75 |
| Tapes | В34 | TU 14-1-1050-74 |
| Sheets and stripes | В33 | TU 14-1-1960-77, TU 14-1-4562-89 |
| Metal forming. Forgings | В03 | TU 14-1-2552-78 |
Chemical composition
| Standard | C | S | P | Mn | Cr | Si | Ni | Fe | Al | B | Ti | Mo | W | Ce | Co |
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
| TU 14-1-3759-84 | ≤0.1 | ≤0.015 | ≤0.015 | ≤0.4 | 17-20 | ≤0.5 | The rest | ≤5 | 1.6-2.3 | ≤0.005 | 1.1-1.6 | 3-5 | 5-7 | ≤0.005 | 5-8 |
Ni is the basis.
According to TU 14-1-3759-84 and TU 14-1-1960-77 the chemical composition is given for the alloy ХН68ВМТЮК-ВД (ЭП693-ВД).
According to TU 14-1-1960-77 technological additive Mg≤0,050% is allowed. The residual content of Nb≤0.10% is not a rejection sign.
According to TU 14-1-3759-84 and TU 14-1-1960-77 the chemical composition is given for the alloy ХН68ВМТЮК-ВД (ЭП693-ВД).
According to TU 14-1-1960-77 technological additive Mg≤0,050% is allowed. The residual content of Nb≤0.10% is not a rejection sign.
Mechanical characteristics
| Section, mm | sT|s0,2, MPa | σB, MPa | d5, % | y, % |
|---|---|---|---|---|
| Steel cold-rolled sheet of thin (0.8-3.0 mm). Without heat treatment - as supplied | ||||
| - | ≤988 | ≥35 | - | |
| Steel cold-rolled sheet in the delivery condition + Aging at 890-910 °C (extract 5-10 h), air cooling | ||||
| 0.8-3 | - | ≥294 | ≥23 | - |
| Bars hot rolled 10-55 mm 45-160 mm forged, machined 24 mm. Hardening in air, 1080-1100 °C (exposure 2 hours) + Aging at 890-910 °C (maintained for 5 h), air cooling | ||||
| ≥520 | ≥930 | ≥32 | ≥37 | |
| - | ≥310 | ≥30 | ≥45 | |
| Bars hot rolled 10-55 mm 45-160 mm forged, machined 24 mm. Hardening in air, 985-1015 °C (exposure 4 h) + Aging at 690-710 °C (aging 16 h), air cooling | ||||
| ≥665 | ≥1030 | ≥25 | ≥30 | |
| - | ≥340 | ≥28 | ≥43 | |
| Welded rings ХН68ВМТЮК-VD supplied at OST 1 90235-76. Annealing in air 1000±15 °C (exposure 4 h) + Aging at 700±10 °C (extract 16 h), air cooling | ||||
| ≥687 | ≥1079 | ≥25 | ≥30 | |
| ≥588 | ≥981 | ≥12 | ≥14 | |
| Welded rings ХН68ВМТЮК-VD supplied at OST 1 90235-76. Hardening in air, 1080-1100 °C (exposure 2 hours) + Aging at 900 °C (maintained for 5 h), air cooling | ||||
| ≥520 | ≥932 | ≥30 | ≥35 | |
| ≥470 | ≥843 | ≥12 | ≥14 | |
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 |
| y | The relative narrowing |
