Steel 4Х18Н2М (ЭП378)
Designation
| Name |
The value |
| Designation GOST Cyrillic |
4Х18Н2М |
| Designation GOST Latin |
4X18H2M |
| Transliteration |
4H18N2M |
| The chemical elements |
4Cr18Н2Mo |
| Name |
The value |
| Designation GOST Cyrillic |
ЭП378 |
| Designation GOST Latin |
EP378 |
| Transliteration |
EhP378 |
| The 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 |
| Sectional and shaped rolling |
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 |
The 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 characteristics
| 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) |
