Alloy ХН70 (ЭИ442)
Designation
| Name |
The value |
| Designation GOST Cyrillic |
ХН70 |
| Designation GOST Latin |
XH70 |
| Transliteration |
HN70 |
| The chemical elements |
CrNi70 |
| Name |
The value |
| Designation GOST Cyrillic |
ЭИ442 |
| Designation GOST Latin |
EI442 |
| Transliteration |
EhI442 |
| The chemical elements |
- |
Description
Alloy ХН70 used: for the manufacture of ribbons with thickness of 0.12 and 0.40 mm and a width of 380 and 400 mm used for parts of the pipeline systems operating under moderate stress conditions of very high temperatures (up to 1100−1200 °C) and other branches of engineering.
Note
Heat-resistant Nickel-based alloy.
The alloy is practically homogeneous structure of the solid solution after heat treatment (heating up to 1000−1200 °C With cooling in water or air).
Besides a sufficient manufacturability (prokativaet, stonemont, weldability) and high resistance to gas corrosion (okalinolomatel) alloy has good thermal fatigue resistance (thermal stability).
Standards
| Name |
Code |
Standards |
| Tapes |
В34 |
TU 14-1-2861-79 |
Chemical composition
| Standard |
C |
S |
P |
Mn |
Cr |
Si |
Ni |
Fe |
Al |
| TU 14-1-2861-79 |
≤0.07 |
≤0.02 |
≤0.02 |
≤0.5 |
28-31 |
≤0.8 |
The rest |
≤5 |
≤0.15 |
Ni is the basis.
According to TU 14-1-2861-79 the content of residual elements is regulated in accordance with GOST 5632.
Mechanical characteristics
| σB, MPa |
| The tape is heat-treated in the delivery condition (0.12 and 0.40 mm) |
| ≥529 |
Description mechanical marks
| Name |
Description |
| σB |
Limit short-term strength |
Physical characteristics
| Temperature |
R, НОм · м |
| 20 |
11 |
A description of the physical symbols
| Name |
Description |
| l |
Coefficient of thermal conductivity |