3H2N2MVF
Steel difficult to weld, little prone to temper brittleness. Flock sensitivity: insensitive.
responsible pressing tool parts with high strength properties and satisfactory ductility after normalization and tempering: sleeve containers, ram, needles and other parts operating at elevated temperatures up to 500 ° C.
Classification
| Country |
Section |
Category |
| CIS, Russia, Ukraine |
Tool steel |
Die tool steel |
Chemical composition
| Standard |
Fe, % |
Si, % |
Mn, % |
Cr, % |
Ni, % |
V, % |
P, % |
C, % |
S, % |
Mo, % |
W, % |
|---|
| OST 24.959.01 - 0 |
91.59–93.81 |
0.17–0.37 |
0.5–0.8 |
2–2.5 |
1.4–1.8 |
0.2–0.3 |
< 0.03 |
0.32–0.38 |
< 0.03 |
0.8–1 |
0.8–1.2 |
Information on suppliers
Mechanical properties at 20 °C
| Rolling |
Standard |
Size, mm |
Tension |
Classifiers |
$$\sigma _{U}$$, $$MPa$$ |
$$\sigma_{P}$$, $$MPa$$ |
$$\epsilon_L$$, % |
Treatment |
|---|
| Round |
|
< 700 |
|
|
1400 |
1300 |
7 |
Normalized and tempered |
Technological Properties
| Weldability |
Flake Susceptibility |
Propensity to temper brittleness |
|---|
| Difficult to weld |
insensitive |
loathsome |
Standards
Description of chemical elements
| Element |
Units of measurement |
Description |
| Fe |
% |
Iron |
| Si |
% |
Silicon |
| Mn |
% |
Manganese |
| Cr |
% |
Chrome |
| Ni |
% |
Nickel |
| V |
% |
Vanadium |
| P |
% |
Phosphorus |
| C |
% |
Carbon |
| S |
% |
Sulfur |
| Mo |
% |
Molybdenum |
| W |
% |
Tungsten |
Description of mechanical properties
| Parameter |
Units of measurement |
Description |
| $$\sigma _{U}$$ |
$$MPa$$ |
Ultimate tensile strength |
| $$\sigma_{P}$$ |
$$MPa$$ |
Proportionality limit |
| $$\epsilon_L$$ |
% |
Elongation at break (longitudinal) |
Designation of types of weldability
| Parameter |
Units of measurement |
Description |
| no limits |
|
Welding is performed without heating and without subsequent heat treatment |
| Boundedly welded |
|
Welding is possible with heating up to 100–120 °C and subsequent heat treatment |
| Difficult to weld |
|
For obtaining quality welded joints, additional operations are required: heating up to 200–300 °C for welding, heat treatment after welding — annealing |
| Not applicable for welded structures |
|
|