X12F1 steel
X12F1 steel
X12F1 steel: 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 X12F1.
General information on steel X12F1
| The substitute for the following steels |
| Of steel grade: Х6ВФ, Х6В3ФМ. |
| Kind of delivery |
| Circle X12F1, bar stock, including shaped: GOST 5950−73, GOST 2590−71, GOST 2591−71. Calibrated bar GOST 5950−73, GOST 7417−75, GOST 8559−75, GOST 8560−78. Grinded rod and silversilver GOST 5950−73, GOST 14955−77. Strip GOST 4405−75. Forged and forged blanks GOST 5950−74, GOST 1133−71, GOST 7831−78. |
| Application |
| Complex shaped profiling rollers, master gears, knurling dies, draws, sections of complex shaped car body dies, complex hole punching dies for sheet metal forming, dies and punches of punching and punching dies with complex configuration of working parts, punches and dies of cold extrusion working at pressure up to 1400−1600 MPa. |
Chemical composition of Kh12F1 steel
| Chemical element |
% |
| Vanadium (V) |
0.70−0.90 |
| Silicon (Si) |
0.15−0.35 |
| Manganese (Mn) |
0.15−0.40 |
| Copper (Cu), not more |
0.30 |
| Nickel (Ni), not more than |
0.35 |
| Sulfur (S), not more than |
0.030 |
| Carbon (C) |
1.25−1.45 |
| Phosphorus (P), not more than |
0.030 |
| Chrome (Cr) |
11.0−12.50 |
Process properties of steel X12F1
| Forging temperature |
| The beginning 1160, the end 850. The sections up to 200 mm are subjected to low-temperature annealing with one subcooling. |
| Weldability |
| Not applicable for welded constructions. |
| Machinability |
| In the hot-rolled condition at NV 217−228 Kυ dv.spl. = 0.8, Kυ b.st. = 0.3. |
| Tendency to tempering ability |
| is not inclined |
| Floc-sensitivity |
| not sensitive |
| Grindability |
| satisfactory |
Temperature of X12F1 steel critical points
| Critical point |
°С |
| Ac1 |
810 |
| Ac3 |
860 |
| Ar3 |
780 |
| Ar1 |
760 |
| Mn |
225 |
Impact toughness of steel X12F1
Impact toughness, KCU, J/cm2
| Delivery condition, heat treatment |
KCU |
HRCe |
| 1030−1050 С hardening, oil. Tempering at 200 °C with 1.5h dwell time. |
24 |
63 |
| Hardening at 1030−1050°C. Tempering at 300 C with holding for 1.5 hours. |
29 |
60 |
| Quenching at 1030−1050 С, oil. Tempering at 400 C with holding for 1.5 hours. |
65 |
59 |
| Quenching at 1030−1050°C, oil. Tempering at 450 C with holding for 1.5 hours. |
73 |
59 |
| Quenching at 1030−1050°C. Tempering 500 C with holding for 1.5 hours. |
35 |
59 |
Hardness of steel X12F1
| Delivery condition, heat treatment regime |
HRCe surface |
HB |
| Rings and strips annealed or high-temperatured |
|
255 |
| Samples. 1050−1100 C hardened, oil |
61 |
|
| High tempering: heating from v<=100 deg/h to 760-790 C, cooling with furnace or in air. |
|
207−255 |
| Annealing: heating with v<=100 deg/h to 850-870 C, cooling with a furnace with v<=50 deg/h to 500-600 C, air |
|
207−255 |
| Isothermal annealing 850−870 C, cooling with v=40 deg/h to 700−720 C, holding for 3−4 h, cooling with v=50 deg/h to 550 C, air. |
|
255 |
| Heating at 650−670 C. Hardening at 1030−1050 С, oil. Tempering at 180−200 C, 1.5h, air (final heat treatment mode) |
61−63 |
|
| Tempering at 650−670°C. Tempering at 1030−1050°C, saltpeter. Tempering at 400−420°C, 1.5h, air (final heat treatment mode) |
58−59 |
|
| Tempering at 1050 С. Tempering at 180 °C. Test temperature 100 C. |
64 |
|
| Tempering at 1050 C. Tempering at 180 C. Test temperature 200 C. |
64 |
|
| Tempering at 1050 C. Tempering 180 C. Test temperature 300 C. |
61 |
|
| Tempering at 1050 C. Tempering 180 C. Test temperature 400 C. |
59 |
|
| Tempering at 1050 C. Tempering 180 C. Test temperature 500 C. |
56 |
|
Physical properties of steel X12F1
| Test temperature, °С |
20 |
100 |
200 |
300 |
400 |
500 |
600 |
700 |
800 |
900 |
| Electrical resistivity (p, nominal value — m) |
640 |
|
|
|
|
|
|
|
|
|
Heat resistance, red resistance of X12F1 steel
Heat resistance
| Temperature, °C |
Time, h |
Hardness, HRCэ |
| 150−170 |
1 |
63 |
| 490−510 |
1 |
59 |
