5H3V3MFS (DI23)
Another designation DI23. Temperature of critical points: Ac1 = 780, Ac3 (Acm) = 920, Ar3 (Arcm) = 725. Hardness after annealing (GOST 5950−2000): HB 10 -1 = 229 — 241 MPa .
for heavy duty press tools (matrices, piercing and forming punches, etc.); Instrument landing on gorizontalnokovochnyh machines and inserts stressed structures stamps for hot deformation volume alloyed structural steels and heat resistant alloys at hot deformation 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, % |
Nb, % |
Mo, % |
W, % |
|---|
| GOST 5950-2000 |
87.57–91 |
0.5–0.8 |
0.2–0.5 |
2.5–3.2 |
< 0.3 |
< 0.4 |
1.5–1.8 |
< 0.03 |
0.45–0.52 |
< 0.03 |
0.05–0.15 |
0.8–1.1 |
3–3.6 |
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 |
|---|
| Grade |
|
15 |
|
|
1680 |
1500 |
8 |
38 |
250 |
Hardening 1130 ° C, oil, and Holidays |
Brinell hardness number
| Rolling |
Standard |
Classifiers |
Value, HBW |
| Alloy |
GOST 5950-73 |
annealing |
229–241 |
Critical point temperatures
| Ac1, K |
Ac3(Acm), K |
Ar3(Arcm), K |
|---|
| 780 |
920 |
725 |
Analogues
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 |
| Nb |
% |
Niobium |
| 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 |
|