Steel 60S2
Description
Steel 60S2
Steel 60S2: a brand 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 60S2.
General information of steel 60S2
| Substitute brand |
| steel: 55S2, 50HFA. |
| Delivery type |
| Wire 60s2, circle 60s2, long products, including shaped: GOST 14959−79, GOST 2590−71, GOST 2591−71, GOST 2879−69, GOST 7419.0−78 — GOST 7419.8−78. Calibrated bar GOST 7417−75, GOST 8559−75, GOST 8560−78, GOST 1051−73. Polished bar and silver bar GOST 14955−77, GOST 7419.0−78 — GOST 7419.8−78. Tape GOST 2283−79. Strip GOST 103−76, GOST 4405−75. Forgings and forged billets GOST 1133−71. |
| Application |
| Thyzhelo-loaded springs, torsion shafts, spring rings, collets, friction discs, spring washers. |
Chemical composition of steel 60S2
| Chemical element |
% |
| Silicon (Si) |
1.5−2.0 |
| Manganese (Mn) |
0.60−0.90 |
| Copper (Cu), no more |
0.20 |
| Nickel (Ni), no more |
0.25 |
| Sulfur (S), no more |
0.035 |
| Carbon (C) |
0.57−0.65 |
| Phosphorus (P), no more |
0.035 |
| Chromium (Cr), no more |
0.30 |
Mechanical properties of steel 60S2
Mechanical properties
| Heat treatment, delivery condition |
Section, mm |
σ 0.2, MPa |
σ B, MPa |
δ 5 ,% |
ψ,% |
HB |
| Steel categories: 3.3A, 3B, 3V, 3G, 4.4A, 4B. Hardening 870 ° С, oil, tempering 470 ° С. |
Samples |
1175 |
1270 |
6 |
25 |
|
| Isothermal seal 860−880 ° С, molten salt 310−330 ° С. Vacation 310−330 ° С, air. |
ten |
1590 |
1760 |
12 |
50 |
|
| Springs. Winding at 850−870 ° C, oil. Vacation 430−460 ° С, air. |
|
|
|
|
|
388−477 |
| Springs. Hardening 850−870 ° С, oil. Vacation 400−450 ° C, air. |
|
|
|
|
|
387−418 |
Mechanical properties at elevated temperatures
| test t, ° C |
σ 0.2, MPa |
σ B, MPa |
δ 5 ,% |
ψ,% |
KCU, J / m 2 |
| Workpiece with a diameter of 17 mm. Hardening 860 ° C, oil. Vacation 550 ° C. |
| 20 |
1100 |
1270 |
11−13 |
33 |
24 |
| 300 |
930 |
1220 |
fifteen |
44 |
43 |
| 400 |
820 |
950 |
19 |
71 |
44 |
| 500 |
510 |
590 |
23 |
87 |
43 |
| Samples 10 mm in diameter, 50 mm long after rolling. Deformation rate 20 mm / min. Strain rate 0.007 1 / s. |
| 800 |
83 |
97 |
66 |
97 |
|
| 900 |
55 |
67 |
62 |
96 |
|
| 1000 |
35 |
42 |
61 |
100 |
|
| 1100 |
20 |
26 |
78 |
100 |
|
| 1200 |
12 |
fifteen |
90 |
100 |
|
| Hardening 860 ° C, oil. Vacation 425 ° C, air. |
| 200 |
1370 |
1670 |
ten |
40 |
|
| 300 |
1220 |
1550 |
20 |
55 |
|
| 400 |
1080 |
1270 |
25 |
75 |
|
Mechanical properties depending on the tempering temperature
| vacation t, ° С |
σ B, MPa |
δ 5 ,% |
ψ,% |
KCU, J / m 2 |
HB |
| Hardening 850 ° С, oil. Vacation |
| 300 |
|
five |
27 |
20 |
465 |
| 400 |
1680 |
7 |
34 |
20 |
425 |
| 500 |
1300 |
ten |
42 |
23 |
345 |
| 600 |
1030 |
17 |
48 |
|
295 |
Technological properties of steel 60S2
| Forging temperature |
| Beginning 1200, end 800. Cooling of workpieces with a section up to 250 mm in air, 251−300 mm — in a pit. |
| Weldability |
| not applicable for welded structures. |
| Machinability by cutting |
| In the hot-rolled state at HB 270−320 and σ B = 1080 MPa K υ tv.spl. = 0.70, K υ b.st. = 0.27. |
| Tendency to release ability |
| not inclined |
| Flock sensitivity |
| not sensitive |
Temperature of critical points of steel 60S2
| Critical point |
° C |
| Ac1 |
770 |
| Ac3 |
820 |
| Ar3 |
770 |
| Ar1 |
700 |
| Mn |
305 |
Impact strength of steel 60S2
Impact strength, KCU, J / cm 2
| Delivery status, heat treatment |
+20 |
-thirty |
-60 |
| Guenching 860 C, oil. Vacation 425 S. |
37 |
thirty |
27 |
Endurance limit of steel 60S2
| σ -1, MPa |
τ -1, MPa |
n |
σ B, MPa |
σ 0.2, MPa |
Heat treatment, steel condition |
| 490 |
294 |
|
1380 |
|
Guenching 860 C, oil. Vacation 400−550 C. |
| 421 |
|
|
1580 |
1370 |
|
| 328 |
|
5E + 6 |
|
|
Hardening. Vacation 470−480 С. |
Hardenability of steel 60S2
Hardening 850 ° C.
| Distance from the end, mm / HRC e |
| 1.5 |
3 |
4.5 |
6 |
nine |
12 |
fifteen |
eighteen |
27 |
39 |
| 60−67 |
59−67 |
57−66 |
54−65 |
44.5−63 |
38.5−60 |
35.5−56 |
34−52.5 |
30−43.5 |
27−30.5 |
| Amount of martensite,% |
Crit. Diam. in water, mm |
Crit. Diam. in oil, mm |
Crete. hardness, HRCэ |
| 50 |
47−82 |
24−53 |
52−53 |
| 90 |
60 |
36 |
58−60 |
Physical properties of steel 60S2
| Test temperature, ° С |
20 |
100 |
200 |
300 |
400 |
500 |
600 |
700 |
800 |
900 |
| Normal elastic modulus, E, GPa |
212 |
206 |
198 |
192 |
181 |
178 |
158 |
144 |
134 |
|
| Torsional shear elastic modulus G, GPa |
82 |
80 |
77 |
74 |
69 |
68 |
60 |
54 |
50 |
|
| Density of steel, pn, kg / m 3 |
7680 |
7660 |
7630 |
7590 |
7570 |
7520 |
|
|
|
|
| Thermal conductivity coefficient W / (m ° С) |
28 |
29 |
29 |
thirty |
thirty |
thirty |
29 |
29 |
28 |
|
| 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) |
11.8 |
12.7 |
13.3 |
13.7 |
14.1 |
14.5 |
14.4 |
12.2 |
|
|
| Specific heat (C, J / (kg ° C)) |
510 |
510 |
520 |
535 |
565 |
585 |
620 |
700 |
|
|