HN77TYU (EI437A)
Discs, rings, blades and other parts operating up to 750 ° C.
Classification
| Country | Section | Category |
|---|---|---|
| CIS, Russia, Ukraine | Heat resistant steels and alloys | Heat resistant alloys |
Chemical composition
| Standard | Fe, % | Si, % | B, % | Mn, % | Cr, % | Ti, % | Ni, % | Al, % | Pb, % | Ce, % | P, % | C, % | S, % |
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
| GOST 5632-72 | < 1 | < 0.6 | < 0.003 | < 0.4 | 19–22 | 2.4–2.8 | 72.084–78 | 0.6–1 | < 0.001 | < 0.02 | < 0.015 | < 0.07 | < 0.007 |
Information on suppliers
Mechanical properties at 700 °C
| Rolling | Standard | Size, mm | Tension | Classifiers | $$\sigma _{U}$$, $$MPa$$ | $$\psi$$, % | d5, % | Treatment |
|---|---|---|---|---|---|---|---|---|
| Rod | GOST 23705 - 79 | 610 | 12 | 5 | Quenching and aging |
Brinell hardness number
| Rolling | Standard | Classifiers | Value, HBW |
|---|---|---|---|
| Rod | GOST 23705 - 79 | 255–321 |
Standards
| Standard | Description |
|---|---|
| GOST 5632-72 | |
| GOST 23705 - 79 | |
| GOST 5632-14 | |
| TU 14-1-1214-75 | |
| TU 14-1-1531-76 | |
| TU 14-1-402-72 |
Description of chemical elements
| Element | Units of measurement | Description |
|---|---|---|
| Fe | % | Iron |
| Si | % | Silicon |
| B | % | Bor |
| Mn | % | Manganese |
| Cr | % | Chrome |
| Ti | % | Titan |
| Ni | % | Nickel |
| Al | % | Aluminium |
| Pb | % | Lead |
| Ce | % | Cerium |
| P | % | Phosphorus |
| C | % | Carbon |
| S | % | Sulfur |
Description of mechanical properties
| Parameter | Units of measurement | Description |
|---|---|---|
| d5 | % | Elongation at break |
| $$\sigma _{U}$$ | $$MPa$$ | Ultimate tensile strength |
| $$\psi$$ | % | Reduction in cross section on fracture |