Steel 18G2AFps
Description
Steel 18G2AFps
Steel 18G2AFps: 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 18G2AFps.
General information about steel 18G2AFps
| Substitute brand |
| steel: 15G2AFDps, 16G2AF, 10HSND, 15HSND. |
| Delivery type |
| thick sheet GOST 19282−73, GOST 19903−74. Strip GOST 82−70. |
| Application |
| Sheets for load-bearing elements of welded structures operating under variable loads in the temperature range up to -60 ° C. |
Chemical composition of 18G2AFps steel
| Chemical element |
% |
| Nitrogen (N) |
0.015−0.025 |
| Vanadium (V) |
0.08−0.15 |
| Silicon (Si), no more |
0.17 |
| Manganese (Mn) |
1.3−1.7 |
| 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 (C) |
0.14−0.22 |
| Phosphorus (P), no more |
0.035 |
| Chromium (Cr), no more |
0.30 |
Mechanical properties of 18G2AFps steel
| Heat treatment, delivery condition |
Section, mm |
σ 0.2, MPa |
σ B, MPa |
δ 5 ,% |
| Sheets and strips (cross samples) |
<32 |
440 |
590 |
19 |
Mechanical properties depending on sheet thickness
| Heat treatment, delivery condition |
σ 0.2, MPa |
σ B, MPa |
δ 5 ,% |
| Sheets. Normalization 920−950 ° C. |
| Sheet thickness 8 mm |
530 |
670 |
26 |
| Sheet thickness 12 mm |
500 |
650 |
24 |
| Sheet thickness 20 mm |
455 |
610 |
26 |
| Sheets. Hardening 940 ° С, tempering 650 ° С. |
| Sheet thickness 20 mm |
540 |
660 |
eighteen |
| Channel and beam No. 11−13. Normalization 920−950 ° C. |
| |
455 |
580 |
25 |
Technological properties of steel 18G2AFps
| Weldability |
| weldable without restrictions. |
Temperature of critical points of steel 18G2AFps
| Critical point |
° C |
| Ac1 |
720 |
| Ac3 |
880 |
| Ar3 |
780 |
| Ar1 |
620 |
Impact toughness of 18G2AFps steel
Impact strength, KCU, J / cm 2
| Delivery status, heat treatment |
-40 |
-70 |
| Sheets and strips (Cross samples) 5−10 mm thick |
44 |
34 |
| Sheets and strips (Cross samples) 10−32 mm thick |
39 |
29 |
