8H4V2MFS2 (EP761, 80H4V2MFS2)
Matrices and punches of cold volume deformation dies, thread rolling rollers.
for matrices and stamps puasonov cold volume deformation experiencing during the operation pressure up to 2300 MPa, thread rolling rollers
Classification
| Country |
Section |
Category |
| CIS, Russia, Ukraine |
Tool steel |
Alloy tool steel |
Chemical composition
| Standard |
Fe, % |
Si, % |
Mn, % |
Cr, % |
Cu, % |
Ni, % |
V, % |
P, % |
C, % |
S, % |
Mo, % |
W, % |
|---|
| GOST 5950-2000 |
85.94–89.1 |
1.7–2 |
0.2–0.5 |
4.5–5.1 |
< 0.3 |
< 0.4 |
1.1–1.4 |
< 0.03 |
0.8–0.9 |
< 0.03 |
0.8–1.1 |
1.8–2.3 |
Information on suppliers
Mechanical properties at 20 °C
| Rolling |
Standard |
Size, mm |
Tension |
Classifiers |
$$\sigma_{P}$$, $$MPa$$ |
Treatment |
|---|
| Alloy |
|
|
|
|
2700–2800 |
Hardening and tempering |
Brinell hardness number
| Rolling |
Standard |
Classifiers |
Value, HBW |
| Alloy |
GOST 5950-73 |
annealing |
255 |
Critical point temperatures
| Ac1, K |
Ac3(Acm), K |
Ar1, K |
Mn, K |
|---|
| 840 |
880 |
785 |
150 |
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 |
| $$\sigma_{P}$$ |
$$MPa$$ |
Proportionality limit |
Description of temperatures of critical points
| Parameter |
Units of measurement |
Description |
| Ac1 |
K |
|
| Ac3(Acm) |
K |
|
| Ar1 |
K |
|
| Mn |
K |
|