Alloy ХН75ТБЮ (ЭИ869)
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Designation
| Name | The value |
|---|---|
| Designation GOST Cyrillic | ХН75ТБЮ |
| Designation GOST Latin | XH75TBJu |
| Transliteration | HN75TBYu |
| The chemical elements | CrNi75TeBeAl |
| Name | The value |
|---|---|
| Designation GOST Cyrillic | ЭИ869 |
| Designation GOST Latin | EI869 |
| Transliteration | EhI869 |
| The chemical elements | - |
Description
Alloy ХН75ТБЮ used: for the manufacture of disks, rotors, fasteners, flat springs and other parts operating at temperatures up to +650 °C; welded parts and assemblies of pipeline valves.
Note
High-temperature Nickel-based alloy.
Standards
| Name | Code | Standards |
|---|---|---|
| Thermal and thermochemical treatment of metals | В04 | ST ЦКБА 016-2005 |
| Sectional and shaped rolling | В32 | TU 14-1-272-72 |
Chemical composition
| Standard | C | S | P | Mn | Cr | Si | Ni | Fe | Al | B | Ti | Nb | Zr |
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
| TU 14-1-272-72 | ≤0.08 | ≤0.02 | ≤0.02 | ≤1 | 14-17 | 0.8 | The rest | ≤3 | 1.1-1.4 | ≤0.005 | 1.5-1.9 | 1-1.5 | ≤0.003 |
Ni is the basis.
Mechanical characteristics
| Section, mm | sT|s0,2, MPa | σB, MPa | d5, % | y, % | kJ/m2, кДж/м2 | Brinell hardness number, MPa |
|---|---|---|---|---|---|---|
| Blank pieces of pipe fittings and welded assemblies operating at tраб≤750 °C at ST CKBA 016-2005. Quenching in water with 1090-1110 °C (exposure for 6 h) and Aging at 1000 °C (exposure 2 hours), cooled with the furnace to 900 °C (aging for 1 h), cooling with the furnace to 800 °C (exposure 2 hours), air cooling to 750 °C (20 h exposure), air cooling | ||||||
| ≤200 | ≥539 | ≥931 | ≥24 | ≥28 | ≥980 | 255-302 |
| Bars and shapes. Austenization heating to 1090-1110 °C (exposure 6 h), cooling in water + Aging 1090-1110 °C (exposure 2 hours), cooled with the furnace to 900 °C | ||||||
| 25 | ≥540 | ≥930 | ≥24 | ≥28 | ≥980 | - |
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 |
Physical characteristics
| Temperature | Е, ГПа | r, кг/м3 |
|---|---|---|
| 20 | 203 | 7950 |
A description of the physical symbols
| Name | Description |
|---|---|
| Е | The normal elasticity modulus |
| r | Density |
| l | Coefficient of thermal conductivity |
| R | UD. the resistivity |
