Alloy ХН67ВМТЮ (ЭП202; KHN67MVTJU)
Designation
| Name |
The value |
| Designation GOST Cyrillic |
ХН67ВМТЮ |
| Designation GOST Latin |
XH67BMTJu |
| Transliteration |
HN67VMTYu |
| The chemical elements |
CrNi67ВCuTeAl |
| Name |
The value |
| Designation GOST Cyrillic |
ЭП202 |
| Designation GOST Latin |
EP202 |
| Transliteration |
EhP202 |
| The chemical elements |
- |
| Name |
The value |
| Designation GOST Cyrillic |
ХН67МВТЮ |
| Designation GOST Latin |
XH67MBTJu |
| Transliteration |
HN67MVTYu |
| The chemical elements |
CrNi67CuВTeAl |
Description
Alloy ХН67ВМТЮ used: for the manufacture of helical springs operating at 600−700 °C; welding constructions with high requirements for heat resistance and heat resistance; working and nozzle blades of gas turbines, casing, disc and sheet metal parts of turbines operating for a long period of time at temperatures up to + 800 °C; solid-rolled rings for different purposes.
Note
High-temperature Nickel-based alloy.
The recommended maximum operating temperature for a long time +800 °C, for a limited time +850 °C.
The temperature of beginning of intensive scaling in air to +1000 °C.
Standards
| Name |
Code |
Standards |
| Sectional and shaped rolling |
В32 |
GOST 23705-79, OST 1 92049-76, TU 14-1-3184-81, TU 14-1-592-73, TU 14-11-245-88 |
| Sheets and stripes |
В33 |
GOST 24982-81, TU 14-1-1471-75, TU 14-1-5047-91 |
| Classification, nomenclature and general norms |
В30 |
GOST 5632-72 |
| Bulls. Blanks. Slabs |
В31 |
OST 3-1686-90, TU 14-1-1214-75 |
| Metal forming. Forgings |
В03 |
TU 14-1-1530-75, TU 14-1-588-73 |
Chemical composition
| Standard |
C |
S |
P |
Mn |
Cr |
Si |
Ni |
Fe |
Cu |
Al |
B |
Ti |
Mo |
W |
Ce |
| GOST 5632-72 |
≤0.08 |
≤0.01 |
≤0.015 |
≤0.5 |
17-20 |
≤0.6 |
The rest |
≤4 |
≤0.3 |
1-1.5 |
≤0.01 |
2.2-2.8 |
4-5 |
4-5 |
≤0.01 |
| TU 14-1-1471-75 |
≤0.08 |
≤0.01 |
≤0.015 |
≤0.5 |
17-20 |
≤0.6 |
The rest |
≤4 |
≤0.3 |
1-1.5 |
≤0.01 |
2.2-2.8 |
4-5 |
4-5 |
≤0.01 |
Ni is the basis.
According to TU 14-1-1471-75 the chemical composition is given for an alloy of grades ХН67МВТЮ (ЭП202) and ХН7МВТЮ-ВД (ЭП202-ВД).
Mechanical characteristics
| Section, mm |
sT|s0,2, MPa |
σB, MPa |
d5, % |
y, % |
kJ/m2, кДж/м2 |
Brinell hardness number, MPa |
| Ring forged in OST 1 92049-76. Hardening in air, 1060-1080 °C (speed of 5.0-5.5 h), air cooling or Quenching in air, 1040-1060 °C (speed of 2.0-2.5 h), air cooling |
| 25 |
≥450 |
≥835 |
≥15 |
≥18 |
≥490 |
- |
| Ring forged in OST 1 92049-76. Annealing in air from 1100-1150 °C (maintained for 5 hours) + Aging at 800-850 °C (exposure for 10 h), air cooling |
| 25 |
≥550 |
≥930 |
≥16 |
≥18 |
≥343 |
- |
| Steel hot-rolled sheet (4.0 to 11.0 mm) in the delivery state according to GOST 24982-81. Hardening in air, 1140-1160 °C + Vacation on the samples at 830-870 °C (extract 5 h), air cooling |
| 4-11 |
≥550 |
≥930 |
≥18 |
- |
- |
- |
| Steel cold-rolled sheet (0.8 to 3.9 mm) and HR (2.0 to 3.9 mm) in the delivery state according to GOST 24982-81. Quenching in water or air with 1070-1090 °C + Vacation at 830-870 °C (extract 5 h), air cooling |
| ≤3.9 |
- |
≥930 |
≥15 |
- |
- |
- |
| The leaves are thin 0,8-2,5 mm as supplies on the other 14-1-1471-75. Annealing in air or in water 1070-1090 °C + Aging at 830-870 °C (maintained for 5 h), air cooling |
|
- |
≥932 |
≥15 |
- |
- |
- |
| Bars hot rolled and forged and according to GOST 23705-79. Annealing in air from 1100-1150 °C (maintained for 5 hours) + Aging at 800-850 °C (exposure for 10 h), air cooling |
|
550-706 |
930-1160 |
16-35 |
18-35 |
392-784 |
241-341 |
|
490-640 |
830-980 |
16-30 |
16-32 |
490-882 |
- |
|
490-590 |
690-780 |
12-25 |
16-30 |
490-882 |
- |
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 |
| kJ/m2 |
Toughness |
Technological properties
| Name |
The value |
| Features of heat treatment |
The optimal conditions of hardening treatment of alloy ХН67ВМТЮ for cylindrical helical springs: a) annealing with ISO—1150°C, air cooling, cold plastic deformation with compression of 50% and aging at 700 °C for 6 h, air cooling for operation at +600 °C; b) annealing with ISO—1150°C, air cooling, cold plastic deformation with compression of 25% and aging at 800 °C for 6 h, air cooling for operation at +700 °C. |
