Steel 4Х18Н2М (ЭП378)

Designation

Name The value
Designation GOST Cyrillic 4Х18Н2М
Designation GOST Latin 4X18H2M
Transliteration 4H18N2M
By chemical elements 4Cr18Н2Mo
Name The value
Designation GOST Cyrillic ЭП378
Designation GOST Latin EP378
Transliteration EhP378
By chemical elements -

Description

4Х18Н2М steel is used: for the manufacture of hot rolled and forged bars used for the manufacture of various components.

Note

Corrosion resistant free-cutting steel.

Standards

Name Code Standards
Bars and shapes В32 OST 4-020.032-78, TU 14-1-314-72

Chemical composition

Standard C S P Mn Cr Si Ni Fe Mo
TU 14-1-314-72 0.35-0.45 0.15-0.25 0.08-0.15 0.6-1 16.5-18.5 ≤0.5 1.7-2.2 Rest 0.6-0.9
Fe is the basis.
According to TU 14-1-314-72, the chemical composition is given for steel grade 4X18N2M (EP378). Deviations from the chemical composition are allowed: carbon ± 0.010%, manganese ± 0.020%, molybdenum ± 0.020%, chromium ± 0.050%, nickel-0.10%, silicon ± 0.050%.

Mechanical properties

HRC
Bars hot rolled and forged. Annealing in air 1050 °C + Vacation at 630-650 °C (aging of 1.0-1.5 h), air cooling
28-32

Description mechanical marks

Name Description
HRC Rockwell hardness (indenter diamond spheroconical)