Steel 60G
Description
Steel 60G
Steel 60G: 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 60G.
General information of steel 60G
| Substitute brand |
| steel 65G. |
| Delivery type |
| 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 1530−78, GOST 2283−79. Strip GOST 103−76, GOST 4405−75. Forgings and forged billets GOST 1133−71. Thick sheet GOST 1577−81. |
| Application |
| flat and round springs, springs, spring rings and other spring-type parts that require high elastic properties and wear resistance; bandages, brake drums and belts, braces, bushings and other parts of general and heavy engineering. |
Chemical composition of steel 60G
| Chemical element |
% |
| Silicon (Si) |
0.17−0.37 |
| Manganese (Mn) |
0.70−1.00 |
| 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 |
0.25 |
Mechanical properties of steel 60G
Mechanical properties
| Heat treatment, delivery condition |
Section, mm |
σ 0.2, MPa |
σ B, MPa |
δ 5 ,% |
ψ,% |
HRC e |
| Steel categories: 3.3A, 3B, 3V, 3G, 4.4A, 4B. Hardening 830 ° С, oil, tempering 470 ° С. |
|
785 |
980 |
8 |
thirty |
|
| Hardening 790−810 ° С, water. Vacation 360−400 ° C, air. |
20 |
1180 |
1370 |
five |
ten |
42−47 |
| Hardening 800−820 ° C, water. Vacation 530−600 ° С, air. |
60 |
640 |
830 |
nine |
37 |
30−35 |
| Normalization |
80 |
390 |
390 |
eleven |
35 |
|
Mechanical properties depending on the tempering temperature
| vacation t, ° С |
σ 0.2, MPa |
σ B, MPa |
δ 5 ,% |
ψ,% |
HB |
| Flat sample 34X9.5 mm. Hardening 950 ° С, oil. |
| 400 |
1460 |
1710 |
2 |
five |
440 |
| 500 |
1270 |
1460 |
4 |
ten |
420 |
| 600 |
1120 |
1240 |
7 |
sixteen |
380 |
| 700 |
980 |
1130 |
five |
22 |
350 |
Technological properties of steel 60G
| Forging temperature |
| The beginning is 1200, the end is 800. |
| Weldability |
| not applicable for welded structures. Limited contact weldability. |
| Machinability by cutting |
| In the quenched and tempered state with σ B = 800−920 MPa K υ tv.spl. = 0.72, K υ b.st. = 0.63. |
| Tendency to release ability |
| prone at Mn content> = 1% |
| Flock sensitivity |
| insensitive |
Temperature of critical points of steel 60G
| Critical point |
° C |
| Ac1 |
726 |
| Ac3 |
765 |
| Ar3 |
741 |
| Ar1 |
689 |
| Mn |
270 |
Impact strength of steel 60G
Impact strength, KCU, J / cm 2
| Delivery status, heat treatment |
+500 |
+300 |
+20 |
-20 |
-40 |
-70 |
| Annealing 1000 C. |
23 |
33 |
fourteen |
7 |
7 |
4 |
| Tempering 830 C, water. Vacation 650 S. |
50 |
100 |
110 |
27 |
23 |
12 |
Hardenability of steel 60G
Hardening.
| Distance from the end, mm / HRC e |
| 1.5 |
3 |
6 |
nine |
12 |
fifteen |
eighteen |
21 |
24 |
36 |
| 62.5 |
62.5 |
61 |
58 |
54 |
47 |
39.5 |
35 |
35.5 |
35.5 |
| Heat treatment |
Crit. Diam. in oil, mm |
| Hardening |
20 |
Physical properties of steel 60G
| Test temperature, ° С |
20 |
100 |
200 |
300 |
400 |
500 |
600 |
700 |
800 |
900 |
| Normal elastic modulus, E, GPa |
204 |
|
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|
|
|
| Torsional shear elastic modulus G, GPa |
81 |
|
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| Density of steel, pn, kg / m 3 |
7810 |
|
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| 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) |
11.6 |
11.9 |
12.9 |
13.8 |
|
14.6 |
|
|
|
|
| Specific heat (C, J / (kg ° C)) |
483 |
487 |
|
529 |
|
575 |
|
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