07H21N9S2ML (VNL-4)
Production of shaped castings for the aviation industry.
Classification
| Country |
Section |
Category |
| CIS, Russia, Ukraine |
Steels and alloys for castings |
Ordinary steel for castings |
Chemical composition
| Standard |
Fe, % |
Si, % |
Mn, % |
Cr, % |
Ti, % |
Cu, % |
Ni, % |
Al, % |
P, % |
C, % |
S, % |
Mo, % |
N, % |
W, % |
|---|
| OST 1-90090 - 79 |
62.97–68.2 |
2–2.5 |
0.5–0.9 |
20.5–22.5 |
< 0.05 |
< 0.3 |
8–9 |
< 0.1 |
< 0.03 |
< 0.07 |
< 0.03 |
0.8–1.3 |
< 0.05 |
< 0.2 |
Information on suppliers
Mechanical properties at 20 °C
| Rolling |
Standard |
Size, mm |
Tension |
Classifiers |
$$\sigma _{U}$$, $$MPa$$ |
$$\sigma_{Y}$$, $$MPa$$ |
$$\psi$$, % |
$$KCU\cdot 10^{3}$$, $$\frac{J}{m^2}$$ |
d5, % |
Treatment |
|---|
| Castings |
OST 1-90090 - 79 |
|
|
|
650 |
400 |
40 |
1000 |
30 |
Hardening 1110oC, water, Aging 8 h, Cooling air |
Standards
Description of chemical elements
| Element |
Units of measurement |
Description |
| Fe |
% |
Iron |
| Si |
% |
Silicon |
| Mn |
% |
Manganese |
| Cr |
% |
Chrome |
| Ti |
% |
Titan |
| Cu |
% |
Copper |
| Ni |
% |
Nickel |
| Al |
% |
Aluminium |
| P |
% |
Phosphorus |
| C |
% |
Carbon |
| S |
% |
Sulfur |
| Mo |
% |
Molybdenum |
| N |
% |
Nitrogen |
| W |
% |
Tungsten |
Description of mechanical properties
| Parameter |
Units of measurement |
Description |
| d5 |
% |
Elongation at break |
| $$\sigma_{Y}$$ |
$$MPa$$ |
Yield strength |
| $$\sigma _{U}$$ |
$$MPa$$ |
Ultimate tensile strength |
| $$\psi$$ |
% |
Reduction in cross section on fracture |
| $$KCU\cdot 10^{3}$$ |
$$\frac{J}{m^2}$$ |
Impact toughness |