Steel 3Х3М3Ф
Description
Steel 3Х3М3Ф
Steel 3X3M3F: brand of steels and alloys. Below is the systematized information on the purpose, chemical composition, types of supplies, substitutes, temperature of critical points, physical, mechanical, technological and casting properties for the grade — Steel 3X3M3 °F.
General information about steel 3X3M3F
| Delivery type |
| Long products, 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. Polished bar and silver bar GOST 5950−73, GOST 14955−77. Strip GOST 4405−75. Forgings and forged billets GOST 5950−74, GOST 1133−71, GOST 7831−78. |
| Application |
| hot forming tool on crank presses and horizontal forging machines, subjected to intensive cooling during operation (as a rule, for small tools), casting molds under the addition of copper alloys, hot cutting knives cooled by water. |
Chemical composition of steel 3X3M3F
| Chemical element |
% |
| Vanadium (V) |
0.40−0.60 |
| Silicon (Si) |
0.10−0.40 |
| Manganese (Mn) |
0.20−0.50 |
| Copper (Cu), no more |
0.30 |
| Molybdenum (Mo) |
2.50−3.00 |
| Nickel (Ni), no more |
0.35 |
| Sulfur (S), no more |
0.030 |
| Carbon (C) |
0.27−0.34 |
| Phosphorus (P), no more |
0.030 |
| Chromium (Cr) |
2.80−3.50 |
Mechanical properties of steel 3X3M3F
Mechanical properties depending on the tempering temperature
| vacation t, ° С |
σ 0.2, MPa |
σ B, MPa |
δ 5 ,% |
ψ,% |
KCU, J / m 2 |
HRC e |
| Hardening 1040 ° С, oil. Exposure on vacation 2 h. |
| 500 |
1320 |
|
fourteen |
45 |
49 |
49 |
| 550 |
|
|
thirteen |
51 |
29 |
49 |
| 600 |
|
1670 |
ten |
51 |
22 |
48 |
| 650 |
1270 |
1460 |
ten |
47 |
48 |
44 |
Mechanical properties versus test temperature
| test t, ° C |
σ 0.2, MPa |
σ B, MPa |
δ 5 ,% |
ψ,% |
KCU, J / m 2 |
HRC e |
| Hardening 1040 ° С, oil. Vacation 600 ° С, 2 h. |
| 20 |
1470 |
1670 |
|
50 |
22 |
49 |
| 300 |
1270 |
1450 |
ten |
|
61 |
48 |
| 400 |
|
1370 |
ten |
50 |
61 |
48 |
| 500 |
1140 |
1270 |
ten |
51 |
55 |
44 |
| 600 |
980 |
1130 |
12 |
54 |
50 |
35 |
Technological properties of steel 3X3M3F
| Forging temperature |
| Beginning 1180, end 850. Slow cooling in wells. |
Temperature of critical points of steel 3X3M3F
| Critical point |
° C |
| Ac1 |
815 |
| Ac3 |
875 |
| Ar3 |
820 |
| Ar1 |
760 |
| Mn |
340 |
Impact strength of steel 3X3M3F
Impact strength, KCU, J / cm 2
| Delivery status, heat treatment |
KCU |
HRCэ |
| Section 10 mm. Hardening 1040 C, oil. Vacation 600 C, 2 h. |
24 |
49−50 |
| Section 120 mm. Hardening 1040 C, oil. Vacation 600 C, 2 h. |
7 |
49−50 |
| Section 200 mm. Hardening 1040 C, oil. Vacation 600 C, 2 h. |
7 |
49−50 |
Hardness of steel 3X3M3F
| Delivery condition, heat treatment mode |
HRC e surface |
HB |
| Annealed or highly tempered bars and strips |
|
229 |
| Samples. Hardening 1040 C, oil. Vacation 550 S. |
St. 46 |
|
| Heating 700−750 C. Hardening 1030−1050 C, oil. Vacation 580−600 С. Vacation 540−560 С (final heat treatment mode) |
49−50 |
|
Physical properties of steel 3X3M3F
| Test temperature, ° С |
20 |
100 |
200 |
300 |
400 |
500 |
600 |
700 |
800 |
900 |
| Normal elastic modulus, E, GPa |
207 |
|
|
177 |
|
|
|
|
|
|
| Density of steel, pn, kg / m 3 |
7828 |
7808 |
7783 |
7754 |
7721 |
7684 |
7642 |
7597 |
7565 |
7525 |
| Thermal conductivity coefficient W / (m ° С) |
32 |
34 |
36 |
36 |
36 |
36 |
34 |
34 |
33 |
34 |
| Ud. electrical resistance (p, Nom. m) |
314 |
365 |
430 |
515 |
600 |
710 |
835 |
965 |
1118 |
1151 |
Heat resistance, redness of steel 3X3M3F
| Temperature, ° С |
Time, h |
Hardness, HRC e |
| 590 |
2 |
47 |
