Steel 16Х16Н3МАД (ЭП811; ВСН21)

Designation

Name The value
Designation GOST Cyrillic 16Х16Н3МАД
Designation GOST Latin 16X16H3MAD
Transliteration 16H16N3MAD
By chemical elements 16Cr16Н3MoNCu
Name The value
Designation GOST Cyrillic ЭП811
Designation GOST Latin EP811
Transliteration EhP811
By chemical elements -
Name The value
Designation GOST Cyrillic ВСН21
Designation GOST Latin BCH21
Transliteration VSN21
By 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 rules В20 OST 1 90005-91
Bars and shapes 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 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 properties

Section, mm σU, MPa d5, % KCU, kJ/m2 HB, 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
σU Limit short-term strength
d5 Elongation after rupture
KCU Toughness
HB Brinell hardness number
HRC Rockwell hardness (indenter diamond spheroconical)

Technological properties

Name The value
Macrostructure and pollution 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.