Steel 10G2
Description
Steel 10G2
Steel 10G2: 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 10G2.
General information about steel 10G2
| Substitute brand |
| steel 09G2 |
| Delivery type |
| Pipe 10g2, long products, including shaped: GOST 4543−71, GOST 2590−71, GOST 2591−71, GOST 2879−69. Calibrated bar GOST 4543−71, GOST 7417−75, GOST 8559−75, GOST 8560−78. Polished bar and silver bar GOST 4543−71, GOST 14955−77. Thick sheet GOST 1577−81, GOST 19903−74. Strip GOST 4543−71, GOST 103−76, GOST 82−70. Forgings and forged billets GOST 1133−71, GOST 4543−71, GOST 8479−70. Pipes GOST 8731−87, GOST 8732−78, GOST 8733−87, GOST 8734−75, GOST 550−75, GOST 21729−76. |
| Application |
| fasteners and other parts operating at temperatures from -70 ° C under pressure. |
Chemical composition of steel 10G2
| Chemical element |
% |
| Silicon (Si) |
0.17−0.37 |
| Manganese (Mn) |
1.20−1.60 |
| Copper (Cu), no more |
0.30 |
| Nickel (Ni), no more |
0.30 |
| Sulfur (S), no more |
0.035 |
| Carbon (C) |
0.07−0.15 |
| Phosphorus (P), no more |
0.035 |
| Chromium (Cr), no more |
0.30 |
Mechanical properties of steel 10G2
| Heat treatment, delivery condition |
Section, mm |
σ 0.2, MPa |
σ B, MPa |
δ 5 ,% |
ψ,% |
KCU, J / m 2 |
HB |
| Bar. Normalization 920 ° C. |
25 |
245 |
420 |
22 |
50 |
|
|
| Forgings. Normalization. KP 215 |
<100 |
215 |
430 |
24 |
53 |
54 |
123−167 |
| Forgings. Normalization. KP 215 |
100−300 |
215 |
430 |
20 |
48 |
49 |
123−167 |
| Forgings. Normalization. KP 215 |
300−500 |
215 |
430 |
eighteen |
40 |
44 |
123−167 |
| Seamless hot-deformed pipes, heat-treated |
|
265 |
470 |
21 |
|
|
197 |
| Seamless cold- and heat-deformed pipes, heat-treated |
|
245 |
420 |
22 |
|
|
197 |
Mechanical properties of rolled products at elevated temperatures
| test t, ° C |
σ 0.2, MPa |
σ B, MPa |
δ,% |
| Normalization 900 ° C, air. |
| 20 |
265 |
460 |
31 |
| 400 |
225 |
390 |
27 |
| 500 |
175 |
295 |
|
| 600 |
115 |
160 |
36 |
Mechanical properties depending on the tempering temperature
| vacation t, ° С |
σ 0.2, MPa |
σ B, MPa |
δ 5 ,% |
ψ,% |
HB |
| Water quenching. |
| 200 |
780 |
930 |
thirteen |
40 |
350 |
| 300 |
680 |
850 |
fourteen |
50 |
330 |
| 400 |
590 |
760 |
eighteen |
59 |
240 |
| 500 |
580 |
680 |
21 |
65 |
200 |
| 600 |
570 |
660 |
23 |
65 |
170 |
Technological properties of steel 10G2
| Forging temperature |
| The beginning is 1250, the end is 800−780. Billets with a cross section up to 100 mm are cooled in air. |
| Weldability |
| Can be welded without restrictions. Welding methods: RDS, ADS submerged arc and gas shielded, EShS. |
| Tendency to release ability |
| not inclined |
| Flock sensitivity |
| not sensitive |
Temperature of critical points of steel 10G2
| Critical point |
° C |
| Ac1 |
720 |
| Ac3 |
830 |
| Ar3 |
710 |
| Ar1 |
620 |
Impact strength of steel 10G2
Impact strength, KCU, J / cm 2
| Delivery status, heat treatment |
+20 |
-40 |
-70 |
| 10 mm sheet as delivered |
86−98 |
70−88 |
41−50 |
| Annealing 900 C. |
280 |
153 |
117 |
| Normalization 900 C. |
364 |
276 |
185 |
| Tempering 900 C. Vacation 500 C. |
321 |
304 |
211 |
Endurance limit of steel 10G2
| σ -1, MPa |
σ B, MPa |
Heat treatment, steel condition |
| 221 |
530 |
Steel after normalization 880 C. |
| 289 |
590 |
Steel after normalization 880 C. |
Physical properties of steel 10G2
| Test temperature, ° С |
20 |
100 |
200 |
300 |
400 |
500 |
600 |
700 |
800 |
900 |
| Normal elastic modulus, E, GPa |
204 |
|
|
|
|
|
|
|
|
|
| Density of steel, pn, kg / m 3 |
7790 |
|
|
|
|
|
|
|
|
|
| Thermal conductivity coefficient W / (m ° С) |
|
|
38 |
37 |
36 |
|
|
|
|
|
| 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) |
11.3 |
|
|
14.7 |
|
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