Designation
| Name |
The value |
| Designation GOST Cyrillic |
15Х12Н2МВФАБ |
| Designation GOST Latin |
15X12H2MBFAB |
| Transliteration |
15H12N2MVFAB |
| By chemical elements |
15Cr12Н2MoWVNNb |
| Name |
The value |
| Designation GOST Cyrillic |
ЭП517 |
| Designation GOST Latin |
EP517 |
| Transliteration |
EhP517 |
| By chemical elements |
- |
Description
15Kh12N2MVFAB steel is used: for the manufacture of structural shapes and forgings intended for subsequent cold machining or hot for subsequent machining (stamping, forging, rolling, etc.) in the manufacture of machine parts; parts special equipment; nitride of parts for the aircraft industry; solid-rolled rings for different purposes.
Note
Corrosion resistant steel heat-resistant martensitic class.
Standards
| Name |
Code |
Standards |
| Bars and shapes |
В22 |
GOST 1133-71, GOST 2590-2006, GOST 2591-2006 |
| Classification, nomenclature and General rules |
В20 |
OST 1 90005-91 |
| Blanks. Of the workpiece. Slabs |
В21 |
OST 1 90176-75 |
| Blanks. Of the workpiece. Slabs |
В31 |
OST 1 90233-76 |
| Bars and shapes |
В32 |
OST 1 92049-76, TU 14-1-1161-75 |
| Processing of metals by pressure. Forgings |
В03 |
TU 14-1-1530-75, TU 14-1-2902-80 |
Chemical composition
| Standard |
C |
S |
P |
Mn |
Cr |
Si |
Ni |
Fe |
N |
V |
Mo |
Nb |
W |
| TU 14-1-2902-80 |
0.13-0.18 |
≤0.015 |
≤0.03 |
≤0.5 |
11-12.5 |
≤0.5 |
1.7-2.1 |
Rest |
0.02-0.08 |
0.18-0.3 |
1.35-1.65 |
0.2-0.35 |
0.65-1 |
| OST 1 90233-76 |
0.13-0.18 |
≤0.015 |
≤0.03 |
≤0.5 |
11-12.5 |
≤0.5 |
1.7-2.1 |
Rest |
0.02-0.08 |
0.18-0.3 |
1.35-1.65 |
0.2-0.35 |
0.65-1 |
Fe is the basis.
According to TU 14-1-2902-80 and TU 14-1-1161-75 the chemical composition is given for 15Х12Н2МВФАБ-Ш.
Mechanical properties
| Section, mm |
sT|s0,2, MPa |
σU, MPa |
d5, % |
y, % |
KCU, kJ/m2 |
HB, MPa |
HRC |
| Ring welded steel grade 15Х12Н2МВФАБ-W on OST 1 90233-76. Normalization with 1120-1140 °C + Vacation at 670-720 °C + Quenching in oil with 1105-1135 °C + Vacation at 670-720 °C |
|
≥833 |
≥981 |
≥14 |
≥56 |
≥588 |
285-330 |
- |
|
≥745 |
≥883 |
≥8 |
≥30 |
≥290 |
- |
- |
| Ring forged in OST 1 92049-76. Quenching in oil with 1105-1135 °C + Vacation at 570-610 °C air cooling |
| 25 |
≥980 |
≥1130 |
≥10 |
≥42 |
≥588 |
321-388 |
- |
| The castings are supplied according to GOST 2176-77 |
| - |
- |
1030-1180 |
- |
- |
- |
302-341 |
29-37 |
| - |
- |
1130-1270 |
- |
- |
- |
321-363 |
34-39 |
| Forgings, rods, rolled and forged. Normalization 1120-1140 °C + Vacation 750-780 °C + Quenching in oil with 1105-1135 °C + Vacation at 670-720 °C |
|
≥835 |
≥1030 |
≥14 |
≥55 |
≥590 |
285-331 |
- |
| Forgings, rods, rolled and forged. Normalization 1120-1140 °C + Vacation at 750-780 °C + Quenching in oil from 1105-1135 °C + Vacation at 570-610 °C |
|
≥980 |
≥1130 |
≥12 |
≥50 |
≥590 |
321-388 |
- |
| Forming at OST 1 90176-75. Normalization at 1120-1140 °C + Vacation at 750-780 °C + Quenching in oil with 1105-1135 °C + Vacation at 670-720 °C |
|
≥835 |
≥981 |
≥14 |
≥55 |
≥588 |
285-331 |
- |
Description mechanical marks
| Name |
Description |
| sT|s0,2 |
Yield strength or limit of proportionality with a tolerance for residual deformation of 0.2% |
| σU |
Limit short-term strength |
| d5 |
Elongation after rupture |
| y |
The relative narrowing |
| KCU |
Toughness |
| HB |
Brinell hardness number |
| HRC |
Rockwell hardness (indenter diamond spheroconical) |
