Steel 16Х16Н3МАД (ЭП811; ВСН21)
Designation
| Name |
The value |
| Designation GOST Cyrillic |
16Х16Н3МАД |
| Designation GOST Latin |
16X16H3MAD |
| Transliteration |
16H16N3MAD |
| The chemical elements |
16Cr16Н3MoNCu |
| Name |
The value |
| Designation GOST Cyrillic |
ЭП811 |
| Designation GOST Latin |
EP811 |
| Transliteration |
EhP811 |
| The chemical elements |
- |
| Name |
The value |
| Designation GOST Cyrillic |
ВСН21 |
| Designation GOST Latin |
BCH21 |
| Transliteration |
VSN21 |
| The chemical elements |
WСН21 |
Description
16Х16Н3МАД steel is used: for the production of highly loaded parts of the aviation industry by cold machining.
Note
Corrosion-resistant steel.
Standards
| Name |
Code |
Standards |
| Classification, nomenclature and general norms |
В20 |
OST 1 90005-91 |
| Sectional and shaped rolling |
В32 |
TU 14-1-2359-78, TU 14-1-3791-84 |
Chemical composition
| Standard |
C |
S |
P |
Mn |
Cr |
Si |
Ni |
Fe |
Cu |
N |
Mo |
| TU 14-1-3791-84 |
0.13-0.19 |
0.07-0.15 |
0.06-0.12 |
0.6-1 |
15-16.5 |
≤0.6 |
2-4 |
The rest |
1-1.5 |
0.05-0.1 |
1.4-1.9 |
Fe is the basis.
According to TU 14-1-2359-78 the following deviations from the established norms of chemical composition in finished products are allowed: - for copper ± 0.10%, - for chromium ± 0.20%. Permissible deviations for other elements and the content of residual elements are in accordance with GOST 5632.
According to TU 14-1-3791-84 Chemical analysis is given for steel grade 16H16N3MAD (EP811). The following deviations from the chemical composition are permissible: chroma ± 0.20%, copper ± 0.10%, nitrogen ± 0.010%. Permissible deviations in other elements and in the content of residual elements are in accordance with GOST 5632.
Mechanical characteristics
| Section, mm |
σB, MPa |
d5, % |
kJ/m2, кДж/м2 |
Brinell hardness number, MPa |
HRC |
| Gradation of performance properties of the finished heat-treated parts for OST 1 90005-91 |
| - |
1080-1270 |
- |
- |
- |
33-39 |
| - |
1620-1810 |
- |
- |
- |
44-48 |
| The bars as supplied on the other 14-1-3791-84 |
| 150 |
930-1180 |
- |
490-690 |
241-321 |
- |
| Bars on the other 14-1-3791-84. The longitudinal samples. Quenching in oil with 1060-1070 °C + cold Treatment at -70°C for 2 hours + Vacation at 150-200 °C (exposure 2 hours) |
|
1620-1770 |
8-14 |
390-590 |
- |
44-48 |
Description mechanical marks
| Name |
Description |
| Section |
Section |
| σB |
Limit short-term strength |
| d5 |
Elongation after rupture |
| kJ/m2 |
Toughness |
| HRC |
Rockwell hardness (indenter diamond spheroconical) |
Technological properties
| Name |
The value |
| Macrostructure and contamination |
In the macrostructure of steel bars on the other 14-1-3791-84 should not be shrinkage and rychlosti, bubbles, cracks and foreign metal and slag inclusions, crusts, delamination and placenow visible without using the magnifying devices. |
