6H6V3MFS (EP569, 55H6V3SMF)
For thread rolling rollers, gears, slot screws, tubing knives knives.
for thread rolling rollers zubonakatnikov, cutting dies and other tools priednaznachennyh cold plastic deformation of high hardness metals.; knives truborazrubochnyh machines, guillotine shears blades for cutting high-strength steels and alloys; chipper knives used in woodworking promyshlennnosti; cutters for the destruction of rocks and other similar tools
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 |
85.89–89.65 |
0.6–0.9 |
0.15–0.45 |
5.5–6.5 |
< 0.3 |
< 0.4 |
0.5–0.8 |
< 0.03 |
0.5–0.6 |
< 0.03 |
0.6–0.9 |
2.5–3.2 |
Information on suppliers
Mechanical properties at 20 °C
| Rolling |
Standard |
Size, mm |
Tension |
Classifiers |
$$\sigma_{P}$$, $$MPa$$ |
Treatment |
|---|
| Alloy |
|
|
|
|
1800–2000 |
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 |
|---|
| 875 |
905 |
755 |
250 |
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 |
|