Steel ШХ15
Description
Steel ШХ15
Steel ShKh15: Database of steels and alloys. Below is a 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 ShKh15.
General information about steel ШХ15
Substitute brand |
steel ШХ9, ШХ12, ШХ15СГ. |
Delivery type |
Circle shx15, pipe shx15, long products, including shaped: GOST 801−78, GOST 2590−71, GOST 2591−71. Calibrated bar GOST 7417−75. Polished bar and silver: GOST 14955−77. Strip GOST 103−76. Wire GOST 4727−83. |
Application |
balls up to 150 mm in diameter, rollers up to 23 mm in diameter, bearing rings with wall thicknesses up to 14 mm, plunger bushings, plungers, pressure valves, nozzle bodies, pusher rollers and other parts that require high hardness, wear resistance and contact strength. |
Chemical composition of steel ШХ15
Chemical element |
% |
Silicon (Si) |
0.17−0.37 |
Manganese (Mn) |
0.20−0.40 |
Copper (Cu), no more |
0.25 |
Nickel (Ni), no more |
0.30 |
Sulfur (S), no more |
0.020 |
Carbon (C) |
0.95−1.05 |
Phosphorus (P), no more |
0.027 |
Chromium (Cr) |
1.30−1.65 |
Mechanical properties of steel ШХ15
Mechanical properties
Heat treatment, delivery condition |
σ 0.2, MPa |
σ B, MPa |
δ 5 ,% |
ψ,% |
KCU, J / m 2 |
HB |
Annealing at 800 ° C, furnace up to 730 ° C, then up to 650 ° C at a rate of 10−20 deg / h, air. |
370−410 |
590−410 |
15−25 |
35−55 |
44 |
179−207 |
Hardening 810 ° С, water up to 200 ° С, then oil. Vacation 150 ° C, air. |
1670 |
1670 |
|
|
five |
|
Mechanical properties depending on the tempering temperature
vacation t, ° С |
σ 0.2, MPa |
σ B, MPa |
δ 5 ,% |
δ 4 ,% |
KCU, J / m 2 |
HB |
HRC e |
Hardening 840 ° С, oil. |
200 |
1960−2200 |
2160−2550 |
|
|
|
|
61−63 |
300 |
1670−1760 |
2300−2450 |
|
|
|
|
56−58 |
400 |
1270−1370 |
1810−1910 |
|
|
|
|
50−52 |
450 |
1180−1270 |
1620−1710 |
|
|
|
|
46−48 |
Hardening 860 ° C, oil. |
400 |
|
1570 |
|
|
fifteen |
480 |
|
500 |
1030 |
1270 |
8 |
34 |
20 |
400 |
|
550 |
900 |
1080 |
8 |
36 |
24 |
360 |
|
600 |
780 |
930 |
ten |
40 |
34 |
325 |
|
650 |
690 |
780 |
sixteen |
48 |
54 |
280 |
|
Mechanical properties versus test temperature
test t, ° C |
σ 0.2, MPa |
σ B, MPa |
δ 5 ,% |
ψ,% |
KCU, J / m 2 |
Heating at 1150 ° C and cooling to test temperatures |
800 |
|
130 |
35 |
43 |
|
900 |
|
88 |
43 |
50 |
|
1000 |
|
59 |
42 |
50 |
|
1100 |
|
39 |
40 |
50 |
|
Sample 6 mm in diameter and 30 mm in length, deformed and annealed. Deformation rate 16 mm / min. Strain rate 0.009 1 / s |
1000 |
32 |
42 |
61 |
100 |
|
1050 |
28 |
48 |
62 |
100 |
|
1100 |
20 |
29 |
72 |
100 |
|
1150 |
17 |
25 |
61 |
100 |
|
1200 |
eighteen |
22 |
76 |
100 |
|
Hardening 830 ° С, oil. Vacation 150 ° С, 1.5 h. |
25 |
|
2550 |
|
|
88 |
-25 |
|
2650 |
|
|
69 |
-40 |
|
2600 |
|
|
64 |
Technological properties of steel ШХ15
Forging temperature |
Beginning 1150, end 800. Sections up to 250 mm are cooled in air, 251−350 mm — in a pit. |
Weldability |
welding method — KTS. |
Machinability by cutting |
In the hot-rolled state at HB 202 and σ B = 740 MPa K υ tv.spl. = 0.90, K υ b.st. = 0.36. |
Tendency to release ability |
inclined |
Flock sensitivity |
sensitive |
Grindability |
good. |
Temperature of critical points of steel ШХ15
Critical point |
° C |
Ac1 |
724 |
Ac3 |
900 |
Ar3 |
713 |
Ar1 |
700 |
Mn |
210 |
Endurance limit of steel ШХ15
σ -1, MPa |
n |
σ B, MPa |
σ 0.2, MPa |
Heat treatment, steel condition |
333 |
1E + 6 |
|
|
HB 192. Annealing. |
804 |
1E + 6 |
|
|
HB 616. Hardening 830 C. Vacation 150 C, oil. |
652 |
1E + 6 |
2160 |
1670 |
HB 582−670 |
Hardenability of steel ШХ15
Hardening 850 ° C.
Distance from the end, mm / HRC e |
1.5 |
3 |
4.5 |
6 |
nine |
12 |
fifteen |
eighteen |
24 |
33 |
65.5−68.5 |
63−68 |
58.5−67.5 |
51.5−67 |
40−64 |
38−54 |
38−48.5 |
38−47 |
33−41.5 |
28−35.5 |
Amount of martensite,% |
Crit. Diam. in water, mm |
Crit. Diam. in oil, mm |
Crete. hardness, HRCэ |
50 |
28−60 |
9−37 |
57 |
90 |
20−54 |
6−30 |
62 |
Physical properties of steel ШХ15
Test temperature, ° С |
20 |
100 |
200 |
300 |
400 |
500 |
600 |
700 |
800 |
900 |
Normal elastic modulus, E, GPa |
211 |
|
|
|
|
|
|
|
|
|
Torsional shear elastic modulus G, GPa |
80 |
|
|
|
|
|
|
|
|
|
Density of steel, pn, kg / m 3 |
7812 |
7790 |
7750 |
7720 |
7680 |
7640 |
|
|
|
|
Thermal conductivity coefficient W / (m ° С) |
|
|
40 |
|
37 |
32 |
|
|
|
|
Ud. electrical resistance (p, Nom. m) |
|
390 |
470 |
520 |
|
|
|
|
|
|
Test temperature, ° С |
20−100 |
20−200 |
20−300 |
20−400 |
20−500 |
20−600 |
20−700 |
20−800 |
20−900 |
20−1000 |
Linear expansion coefficient (a, 10−6 1 / ° С) |
11.9 |
15.1 |
15.5 |
15.6 |
15.7 |
|
|
|
|
|
Heat resistance, redness of steel ШХ15
Heat resistance
Temperature, ° С |
Time, h |
Hardness, HRC e |
150−160 |
1 |
63 |