Steel 09G2
Description
Steel 09G2
Steel 09G2: 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 brand — Steel 09G2.
General information of 09G2 steel
| Substitute brand |
| steel: 10G2, 09G2S, 09G2D, 09G2T |
| Delivery type |
| Long products, including shaped: GOST 19281−73, GOST 2590−71, GOST 2591−71, GOST 8239−72, GOST 8240−72, GOST 5521−76, GOST 8509−86, GOST 8510−86. Thick sheet GOST 19282−73, GOST 19903−74. Thin sheet GOST 17066−80, GOST 19903−74, GOST 19904−74. Strip GOST 19282−73, GOST 82−70, GOST 5521−76. Forgings and forged billets GOST 1133−71. |
| Application |
| Racks of trusses, upper rail carriages, center beams, I-beams and other parts of car building, excavator parts, elements of welded metal structures and other parts operating at temperatures from -40 to + 450 ° С. |
Chemical composition of 09G2 steel
| Chemical element |
% |
| Nitrogen (N), no more |
0.008 |
| Silicon (Si) |
0.17−0.37 |
| Manganese (Mn) |
1.4−1.8 |
| Copper (Cu), no more |
0.30 |
| Arsenic (As), no more |
0.08 |
| Nickel (Ni), no more |
0.30 |
| Sulfur (S), no more |
0.040 |
| Carbon ©, no more |
0.12 |
| Phosphorus (P), no more |
0.035 |
| Chromium (Cr), no more |
0.30 |
Mechanical properties of 09G2 steel
| Heat treatment, delivery condition |
Section, mm |
σ 0.2, MPa |
σ B, MPa |
δ 5 ,% |
δ 4 ,% |
| Sections and sections |
<20 |
305 |
440 |
21 |
|
| Sheets and strips as delivered (cross samples) |
20−32 |
295 |
440 |
21 |
|
| Hot rolled sheets |
2−3.9 |
|
440 |
|
17 |
Mechanical properties depending on the tempering temperature
| vacation t, ° С |
σ 0.2, MPa |
σ B, MPa |
δ 5 ,% |
ψ,% |
KCU, J / m 2 |
HB |
| 200 |
780 |
930 |
12 |
40 |
59 |
337 |
| 300 |
690 |
880 |
fourteen |
50 |
|
325 |
| 400 |
620 |
750 |
19 |
60 |
98 |
260 |
| 500 |
590 |
690 |
21 |
65 |
127 |
225 |
| 600 |
570 |
670 |
22 |
65 |
186 |
200 |
| 700 |
380 |
640 |
|
|
167 |
80 |
Technological properties of 09G2 steel
| Forging temperature |
| Beginning 1250, end 850. |
| Weldability |
| weldable 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 09G2
| Critical point |
° C |
| Ac1 |
720 |
| Ac3 |
830 |
| Ar3 |
710 |
| Ar1 |
620 |
| Mn |
320 |
Impact strength of 09G2 steel
Impact strength, KCU, J / cm 2
| Delivery status, heat treatment |
-40 |
-40 (KCV) |
-70 (KCV) |
| GOST 19281−73. Sections and shapes with a section of 5−10 mm |
|
39 |
29 |
| GOST 19281−73. Sections and sections with a section of 10−20 mm incl. |
|
29 |
29 |
| GOST 19281−73. Sections and shapes with a cross section of St. 20 to 32 mm incl. |
|
29 |
|
| GOST 19282−73. Sheets and strips (Cross samples) with a cross section of 5−10 mm |
34 |
|
|
| GOST 19282−73. Sheets and strips (Cross samples) with a cross section of 10−20 mm incl. |
29 |
|
|
| GOST 19282−73. Sheets and strips (Samples cross) with a cross section of St. 20 to 32 mm incl. |
39 |
|
|
Endurance limit of 09G2 steel
| σ -1, MPa |
τ -1, MPa |
Heat treatment, steel condition |
| 235 |
137 |
Cross sections 4−32 mm as delivered |
| 274 |
167 |
Sections 10−20 mm after improvement. |
