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Steel 19Х20Н4АМ3Д2С (ЭК7)

Designation

Name The value
Designation GOST Cyrillic 19Х20Н4АМ3Д2С
Designation GOST Latin 19X20H4AM3D2C
Transliteration 19H20N4AM3D2S
The chemical elements 19Cr20Н4NMo3Cu2С
Name The value
Designation GOST Cyrillic ЭК7
Designation GOST Latin EK7
Transliteration EhK7
The chemical elements -

Description

19Х20Н4АМ3Д2С steel is used: for the production of billets for re-rolling and hot-rolled steel intended for the manufacture of parts for special equipment operating in sea water and in areas with a Maritime climate.

Standards

Name Code Standards
Bulls. Blanks. Slabs В31 TU 14-1-1213-75, TU 14-1-3640-83

Chemical composition

Standard C S P Mn Cr Si Ni Fe Cu N Mo Ce
TU 14-1-3640-83 0.17-0.22 ≤0.02 ≤0.035 0.3-0.8 19-20.5 1.1-1.5 4.3-4.9 The rest 1.9-2.5 0.11-0.16 2.7-3.2 ≤0.02
Fe is the basis.
According to TU 14-1-3640-83, the chemical composition is presented for steel grade 19Х20Н4АМ3Д2С (ЭК7). In the finished metal, deviations from the mass fraction of elements are allowed: by carbon ± 0.010%, for silicon +0.20%, for manganese -0.20%, for nickel -0.30%, for molybdenum ± 0.10%, for nitrogen +0.030%. The calculated mass fraction of cerium is established by the technological instruction and its residual content in the metal is not determined by chemical analysis. In the steel electroslag remelting brand 19H20N4AM3D2S-Sh (EC7-SH), the mass fraction of sulfur should not exceed 0.015%.

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