Steel 75KhSMF
Steel 75KhSMF
Steel 75KhSMF: a classifier of steels and alloys. Below is systematized information on the purpose, chemical composition, types of supply, substitutes, critical point temperatures, physical, mechanical, technological and foundry properties for the brand — Steel 75KhSMF.
General information on steel 75KhSMF
| Grade substitute |
| steel 9Х1. |
| Delivery type |
| rolls OST 24.013.20−85. |
| Application |
| Working rolls of sheet rolling mills for cold rolling of metals. |
Chemical composition of steel 75HSMF
| Chemical element |
% |
| Vanadium (V) |
0.10−0.20 |
| Silicon (Si) |
0.80−1.20 |
| Manganese (Mn), not more than |
0.30 |
| Molybdenum (Mo) |
0.20−0.30 |
| Nickel (Ni), max. |
0.50 |
| Sulfur (S), not more than |
0.030 |
| Carbon (C) |
0.72−0.80 |
| Phosphorus (P), not more than |
0.030 |
| Chromium (Cr) |
1.20−1.50 |
Mechanical properties of steel 75KhSMF
Mechanical properties
| Heat treatment, delivery condition |
Section, mm |
HRCe |
| Barrels of work rolls (after induction heat treatment) of skin pass and finishing stands of cold rolling mills, type 1 |
|
HSD 95−105 |
| Barrels of work rolls (after induction heating) of stands of cold rolling mills, type 2 |
|
HSD 90−96 |
| Barrels of work rolls (after induction heating) of hot strip mills, type 3 |
<650 |
HSD 75−90 |
| Working roll necks. |
|
HSD 30−55 |
Mechanical properties depending on the cross section
| Section, mm |
σ0, 2, MPa |
σB, MPa |
δ5, % |
ψ, % |
KCU, J/m2 |
HB |
| Isothermal annealing at 850 °C, 15 h. Tempering at 740 °C, 10 h. |
| 235 |
420 |
750 |
24 |
45 |
57 |
|
| 250 |
|
730 |
26 |
56 |
71−73 |
207 |
| Annealing at 780−800°C, 6 h. Tempering from 870−890°C, cooling in oil. Tempering at 700−720°C, 7 h. |
| 400 |
|
|
|
|
|
240−275 |
Technological properties of steel 75KhSMF
| Forging temperature |
| The beginning 1150, the end 850. |
Steel 75KhSMF critical point temperature
| Critical point |
°С |
| Ac1 |
775 |
| Ac3 |
815 |
| Ar3 |
745 |
| Ar1 |
717 |
| Mn |
300 |
Hardness of steel 75KhSMF
| Delivery condition, heat treatment regime |
HSD |
| Barrels of work rolls (after induction heat treatment) of skin pass and finishing stands of cold rolling mills, type 1. Cross-section up to 650 mm. |
95−105 |
| Drums of work rolls (after induction heat treatment) of stands of cold rolling mills, type 2. Cross-section up to 650 mm. |
90−96 |
| Barrels of work rolls (after induction heating) of stands of hot rolling mills, type 3. Cross-section up to 650 mm. |
75−90 |
| Worker’s necks |
30−55 |
Hardenability of steel 75ХСМФ
900 °C hardenability.
| Face distance, mm / HRCe |
| 1.5 |
10 |
20 |
30 |
40 |
50 |
55 |
| 67,5 |
67 |
66 |
65 |
63,5 |
61 |
61 |
