Steel 15KHSND
Description
Steel 15KHSND
Steel 15KHSND: 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 15HSND.
General information about steel 15HSND
| Substitute brand |
| steel: 16G2AF, 15GF, 14HGS, 16GS, 14SND. |
| Delivery type |
| 15khsnd sheet, rolled sections, including shaped: GOST 19281−73, GOST 2590−71, GOST 2591−71, GOST 8239−72, GOST 8240−72, GOST 6713−75, GOST 535−79. Thick sheet GOST 19282−73, GOST 19903−74, GOST 6713−75, GOST 14637−79. Thin sheet GOST 17066−80, GOST 19903−74, GOST 19904−74. Strip GOST 103−76, GOST 82−70, GOST 6713−75, GOST 14637−79. Forgings forged blanks GOST 1133−71. |
| Application |
| elements of welded metal structures and various parts, which are subject to requirements for increased strength and corrosion resistance with limited mass and operating at temperatures from -70 to 450 ° C. |
Chemical composition of steel 15HSND
| Chemical element |
% |
| Nitrogen (N), no more |
0.008 |
| Silicon (Si) |
0.4−0.7 |
| Manganese (Mn) |
0.4−0.7 |
| Copper (Cu) |
0.2−0.4 |
| Arsenic (As), no more |
0.08 |
| Nickel (Ni) |
0.3−0.6 |
| Sulfur (S), no more |
0.040 |
| Carbon (C) |
0.12−0.18 |
| Phosphorus (P), no more |
0.035 |
| Chromium (Cr) |
0.6−0.9 |
Mechanical properties of steel 15ХСНД
Mechanical properties
| Heat treatment, delivery condition |
Section, mm |
σ 0.2, MPa |
σ B, MPa |
δ 5 ,% |
| Sections and sections |
<10 |
345 |
490 |
21 |
| Sections and sections |
10−32 |
325 |
470 |
21 |
| Sheets and strips as delivered (cross samples) |
<32 |
345 |
490 |
21 |
| Hot rolled sheets |
2−3.9 |
|
490 |
|
Mechanical properties at elevated temperatures
| test t, ° C |
σ 0.2, MPa |
σ B, MPa |
δ 10 ,% |
| Normalized sheets |
| 20 |
370 |
620 |
20 |
| 200 |
370 |
590 |
fifteen |
| 300 |
360 |
610 |
eleven |
| 400 |
375 |
590 |
fourteen |
| 500 |
300 |
365 |
17 |
Mechanical properties depending on the tempering temperature
| vacation t, ° С |
σ 0.2, MPa |
σ B, MPa |
δ 10 ,% |
ψ,% |
KCU, J / m 2 |
HB |
| Hardening 900 ° C, water. |
| 200 |
1220 |
1450 |
ten |
56 |
78 |
425 |
| 300 |
1160 |
1370 |
ten |
57 |
|
410 |
| 400 |
1080 |
1170 |
eleven |
58 |
78 |
360 |
| 500 |
840 |
930 |
fifteen |
62 |
118 |
275 |
| 600 |
640 |
740 |
20 |
68 |
176 |
220 |
Technological properties of steel 15ХСНД
| 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 15ХСНД
| Critical point |
° C |
| Ac1 |
730 |
| Ac3 |
885 |
| Ar3 |
803 |
| Ar1 |
650 |
Impact strength of steel 15ХСНД
Impact strength, KCU, J / cm 2
| Delivery status, heat treatment |
-40 |
-40 (KCV) |
-70 (KCV) |
-70 |
| Sections and shapes with a section of 5−10 mm |
|
39 |
34 |
|
| Sections and sections with a section of 10−20 mm |
|
29 |
29 |
|
| Sections and shapes with a section of 20−32 mm |
|
29 |
|
|
| Sheets and strips (cross samples) with a cross section of 5−10 mm |
39 |
|
|
29 |
| Sheets and strips (cross samples) with a section of 10−32 mm |
29 |
|
|
29 |
Endurance limit of steel 15HSND
| σ -1, MPa |
τ -1, MPa |
n |
σ B, MPa |
Heat treatment, steel condition |
| 304 |
157 |
|
|
Samples as delivered without notch |
| 274−299 |
|
1E + 7 |
490−560 |
|
Hardenability of steel 15ХСНД
| Distance from the end, mm / HRC e |
| |
| |
| Heat treatment |
Crit. Diam. in water, mm |
Crit. Diam. in oil, mm |
Crete. hardness, HRCэ |
| Quenching 900 C. |
thirty |
|
36−48 |
| |
|
thirty |
24−35 |
Corrosion properties of steel 15ХСНД
| Wednesday |
Depth, mm / year |
| Sea water |
0.0435−0.0573 |
| Priming |
Up to 0.0179 |
| Air |
Up to 0.0608 |
