Steel 15G2SFD
Description
Steel 15G2SFD
Steel 15G2SFD: a 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 grade — Steel 15G2SFD.
General information of steel 15G2SFD
| Delivery type |
| long products, including shaped: GOST 19281−73, GOST 2590−71, GOST 2591−71, GOST 8239−72, GOST 8240−72. Thick sheet GOST 19282−73, GOST 19903−74. Strip GOST 82−70, GOST 103−76. Forgings and forged billets GOST 1133−71. |
| Application |
| for welded metal structures in construction and mechanical engineering. |
Chemical composition of steel 15G2SFD
| Chemical element |
% |
| Nitrogen (N), no more |
0.008 |
| Vanadium (V) |
0.05−0.10 |
| Silicon (Si) |
0.4−0.7 |
| Manganese (Mn) |
1.3−1.7 |
| Copper (Cu) |
0.15−0.30 |
| Arsenic (As), no more |
0.08 |
| Nickel (Ni), no more |
0.30 |
| Sulfur (S), no more |
0.04 |
| Carbon (C) |
0.12−0.18 |
| Phosphorus (P), no more |
0.035 |
| Chromium (Cr), no more |
0.30 |
Mechanical properties of 15G2SFD steel
| Heat treatment, delivery condition |
Section, mm |
σ 0.2, MPa |
σ B, MPa |
δ 5 ,% |
| Sections and sections |
<20 |
390 |
550 |
eighteen |
| Sheets and strips as delivered |
5−32 |
390 |
550 |
eighteen |
| Sheets after quenching, tempering (transverse samples) |
10−32 |
440 |
590 |
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 |
| Sheets 20 mm thick after hardening |
| 400 |
780 |
880 |
thirteen |
37 |
73 |
| 500 |
710 |
810 |
17 |
52 |
73 |
| 600 |
710 |
800 |
|
52 |
78 |
| 650 |
640 |
730 |
22 |
58 |
108 |
Mechanical properties depending on sheet thickness
| Heat treatment, delivery condition |
σ 0.2, MPa |
σ B, MPa |
δ 5 ,% |
KCU, J / m 2 |
| Hot rolled sheets |
| Sheet thickness 3 mm |
470 |
660 |
20 |
|
| Sheet thickness 12 mm |
420 |
590 |
eighteen |
94 |
| Sheet thickness 20 mm |
410 |
570 |
19 |
62 |
| Normalized sheets |
| Sheet thickness 3 mm |
490 |
710 |
21 |
|
| Sheet thickness 12 mm |
450 |
640 |
27 |
100 |
| Sheet thickness 20 mm |
410 |
590 |
28 |
127 |
Technological properties of steel 15G2SFD
| Weldability |
| weldable without restrictions. … |
Temperature of critical points of steel 15G2SFD
Ac1 720 Ac3 850 Mn 420
Impact strength of steel 15G2SFD
Impact strength, KCU, J / cm 2
| Delivery status, heat treatment |
-40 |
-40 (KCV) |
-70 |
| Sections and shapes with a section of 5−10 mm |
|
39 |
|
| Sections and sections with a section of 10−20 mm |
|
34 |
|
| Sheets and strips with a cross section of 5−10 mm |
39 |
|
|
| Sheets and strips with a cross section of 10−32 mm |
34 |
|
|
| Sheets after quenching, tempering (Cross samples) with a section of 10−32 mm |
39 |
|
29 |
