19X20N4AM3D2S 강철 (EK7)

19Х20Н4АМ3Д2С
19X20H4AM3D2C
19H20N4AM3D2S
19Cr20Н4NMo3Cu2С
ЭК7
EK7
EhK7
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ТУ В31 ТУ 14-1-1213-75, ТУ 14-1-3640-83

C S P Mn Cr Si Ni Fe Cu N Mo Ce
ТУ 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 1.9-2.5 0.11-0.16 2.7-3.2 ≤0.02

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