4H2V5MF (EI959)
Another designation EI959. Temperature of critical points: Ac1 = 820, Ac3 (Acm) = 940, Ar3 (Arcm) = 840, Ar1 = 690, Mn = 205. Hardness after annealing (GOST 5950−2000): HB 10 -1 = 241 MPa.
for heavy duty pressing tool (small inserts final stamping stream of small pluggable characters, punches and dies for extrusion, etc.) at the hot deformation of alloy structural steels and superalloys
Classification
| Country |
Section |
Category |
| CIS, Russia, Ukraine |
Tool steel |
Die tool steel |
Chemical composition
| Standard |
Fe, % |
Si, % |
Mn, % |
Cr, % |
Cu, % |
Ni, % |
V, % |
P, % |
C, % |
S, % |
Mo, % |
W, % |
|---|
| GOST 5950-2000 |
87.69–91.6 |
0.1–0.4 |
0.1–0.45 |
2.2–3 |
< 0.3 |
< 0.4 |
0.6–0.9 |
< 0.03 |
0.3–0.4 |
< 0.03 |
0.6–0.9 |
4.5–5.5 |
Information on suppliers
Mechanical properties at 20 °C
| Rolling |
Standard |
Size, mm |
Tension |
Classifiers |
$$\sigma _{U}$$, $$MPa$$ |
$$\sigma_{P}$$, $$MPa$$ |
$$\epsilon_L$$, % |
$$\psi$$, % |
$$KCU\cdot 10^{3}$$, $$\frac{J}{m^2}$$ |
Treatment |
|---|
| Round |
|
15 |
|
|
1680 |
1480 |
10 |
42 |
300 |
Hardening 1080 ° C, oil |
Brinell hardness number
| Rolling |
Standard |
Classifiers |
Value, HBW |
| Alloy |
GOST 5950-73 |
annealing |
241 |
Critical point temperatures
| Ac1, K |
Ac3(Acm), K |
Ar3(Arcm), K |
Ar1, K |
Mn, K |
|---|
| 820 |
940 |
840 |
690 |
205 |
Analogues
| Germany |
Japan |
France |
Italy |
Poland |
Czech Republic |
Austria |
|---|
| 1.2567 (30WCrV17-2) |
SKD4 |
X32WCrV5 |
X30WCrV5-3KU |
WWS1 |
19720 |
BOHLERW105 |
Standards
Description of chemical elements
| Element |
Units of measurement |
Description |
| Fe |
% |
Iron |
| Si |
% |
Silicon |
| Mn |
% |
Manganese |
| Cr |
% |
Chrome |
| Cu |
% |
Copper |
| 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) |
| $$\psi$$ |
% |
Reduction in cross section on fracture |
| $$KCU\cdot 10^{3}$$ |
$$\frac{J}{m^2}$$ |
Impact toughness |
Description of temperatures of critical points
| Parameter |
Units of measurement |
Description |
| Ac1 |
K |
|
| Ac3(Acm) |
K |
|
| Ar3(Arcm) |
K |
|
| Ar1 |
K |
|
| Mn |
K |
|