Steel 14G2
Description
Steel 14G2
Steel 14G2: 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 14G2.
General information about steel 14G2
| Substitute brand |
| steel 15HSND |
| Delivery type |
| Thick sheet GOST 19282−73, GOST 19903−74. Strip GOST 82−70, GOST 103−76. Thin sheet GOST 17066−80, GOST 19903−74, GOST 19904−74. Sections, including shaped GOST 19281−73, GOST 2590−71, GOST 2591−71, GOST 8239−72, GOST 8240−72. |
| Application |
| For large sheet structures operating down to temperatures of -70 ° C. |
Chemical composition of steel 14G2
| Chemical element |
% |
| Nitrogen (N), no more |
0.008 |
| Silicon (Si) |
0.17−0.37 |
| Manganese (Mn) |
1.2−1.6 |
| 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) |
0.12−0.18 |
| Phosphorus (P), no more |
0.035 |
| Chromium (Cr), no more |
0.30 |
Mechanical properties of steel 14G2
| Heat treatment, delivery condition |
Section, mm |
σ 0.2, MPa |
σ B, MPa |
δ 5 ,% |
| Sections and sections |
<10 |
335 |
460 |
21 |
| Sheets and strips (cross-sectional samples) |
10−32 |
325 |
450 |
21 |
| Sheets after quenching, tempering (transverse samples) |
10−32 |
390 |
530 |
eighteen |
| Hot rolled sheets |
2−3.9 |
|
460 |
17 |
Mechanical properties depending on the tempering temperature
| vacation t, ° С |
σ 0.2, MPa |
σ B, MPa |
ψ,% |
| Rod with a diameter of 19 mm. Hardening. Cooling at a speed of 200 deg / s. Exposure on vacation 1 h |
| 200 |
1220 |
1240 |
60 |
| 300 |
1260 |
1270 |
60 |
| 400 |
1150 |
1180 |
61 |
| 500 |
810 |
880 |
67 |
| 600 |
660 |
760 |
70 |
| Rod with a diameter of 19 mm. Hardening. Cooling at a speed of 45 deg / s. Exposure on vacation 1 h |
| 200 |
900 |
980 |
55 |
| 300 |
900 |
930 |
59 |
| 400 |
830 |
880 |
59 |
| 500 |
660 |
750 |
63 |
| 600 |
590 |
690 |
67 |
Technological properties of steel 14G2
| Forging temperature |
| Beginning 1200, end 900. |
| Weldability |
| restrictedly weldable. |
Temperature of critical points of steel 14G2
| Critical point |
° C |
| Ac1 |
709 |
| Ac3 |
825 |
Impact strength of steel 14G2
Impact strength, KCU, J / cm 2
| Delivery status, heat treatment |
-40 |
-40 (KCV) |
-70 (KCV) |
-70 |
| Sections with a section of 5−10 mm |
|
34 |
34 |
|
| Sections 10−20 mm |
|
29 |
29 |
|
| Sections 20−32 mm |
|
29 |
|
|
| Sheets and strips with a cross section of 5−10 mm |
34 |
|
|
|
| Sheets and strips with a cross section of 10−32 mm |
29 |
|
|
|
| Sheets after quenching and tempering (cross samples) with a section of 10−32 mm. |
39 |
|
|
29 |
Endurance limit of steel 14G2
| σ -1, MPa |
n |
σ 0.2, MPa |
Heat treatment, steel condition |
| 295 |
1E + 7 |
340 |
Round smooth sample |
| 125 |
1E + 7 |
340 |
Round notched |
