Designation
| Name |
The value |
| Designation GOST Cyrillic |
ХН68ВМТЮК |
| Designation GOST Latin |
XH68BMTJuK |
| Transliteration |
HN68VMTYuK |
| By chemical elements |
CrNi68ВCuTeAl |
| Name |
The value |
| Designation GOST Cyrillic |
ЭП693 |
| Designation GOST Latin |
EP693 |
| Transliteration |
EhP693 |
| By 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 |
| Bars and shapes |
В32 |
GOST 14955-77, GOST 22411-77, TU 14-1-223-72, TU 14-1-3676-83, TU 14-1-3759-84 |
| Sheets and strips |
В23 |
GOST 19904-90 |
| Blanks. Of the workpiece. Slabs |
В31 |
OST 1 90235-76, OST 1 90421-92, TU 14-1-1214-75 |
| Tape |
В34 |
TU 14-1-1050-74 |
| Sheets and strips |
В33 |
TU 14-1-1960-77, TU 14-1-4562-89 |
| Processing of metals by pressure. 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 |
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.
Mechanical properties
| Section, mm |
sT|s0,2, MPa |
σU, 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 |
| sT|s0,2 |
Yield strength or limit of proportionality with a tolerance for residual deformation of 0.2% |
| σU |
Limit short-term strength |
| d5 |
Elongation after rupture |
| y |
The relative narrowing |
