75HMF
Technological properties. Weldability: hard -to- weld steel. Flock sensitivity: insensitive. Temperature of critical points: Ac 1 = 760 — 790. Hardness after normalization and tempering: HB 10 -1 = 241 — 285 MPa. Hardness after quenching and tempering HB 10 -1 = 352 — 429 MPa. Substitutes: 75XM, 9HF.
working and supporting rolls forged sheet mills for hot rolling of ferrous metals.
Classification
| Country |
Section |
Category |
| CIS, Russia, Ukraine |
Tool steel |
Roll tool steel |
Chemical composition
| Standard |
Fe, % |
Si, % |
Mn, % |
Cr, % |
Ni, % |
V, % |
P, % |
C, % |
S, % |
Mo, % |
|---|
| OST 24.013.04 - 0 |
95.27–97.35 |
0.2–0.6 |
0.2–0.7 |
1.4–1.7 |
< 0.3 |
0.05–0.25 |
< 0.04 |
0.7–0.8 |
< 0.04 |
0.1–0.3 |
Information on suppliers
Technological Properties
| Weldability |
Flake Susceptibility |
|---|
| Difficult to weld |
insensitive |
Critical point temperatures
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 |
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 |
|
|
Description of temperatures of critical points
| Parameter |
Units of measurement |
Description |
| Ac1 |
K |
|