Designation
| Name |
The value |
| Designation GOST Cyrillic |
08Х20Н5АГ12МФ |
| Designation GOST Latin |
08X20H5AG12MF |
| Transliteration |
08H20N5AG12MF |
| By chemical elements |
08Cr20Н5NMn12MoV |
| Name |
The value |
| Designation GOST Cyrillic |
ДИ8 |
| Designation GOST Latin |
DI8 |
| Transliteration |
DI8 |
| By chemical elements |
CuИ8 |
Description
08Х20Н5АГ12МФ steel is used: for the production of billets, forgings and rolled steel used for manufacturing of various parts of shipbuilding.
Note
Corrosion resistant high-strength austenitic steel, alloyed with nitrogen.
Standards
| Name |
Code |
Standards |
| Blanks. Of the workpiece. Slabs |
В31 |
TU 14-1-1893-76 |
| Bars and shapes |
В32 |
TU 14-1-2290-77 |
| Processing of metals by pressure. Forgings |
В03 |
TU 92-04-01-006-90 |
Chemical composition
| Standard |
C |
S |
P |
Mn |
Cr |
Si |
Ni |
Fe |
N |
V |
Mo |
| TU 14-1-2290-77 |
≤0.08 |
≤0.015 |
≤0.03 |
11.5-13.5 |
18-20 |
0.2-0.7 |
4.5-5.5 |
Rest |
0.55-0.65 |
0.8-1.1 |
1.2-1.5 |
Fe is the basis.
According to TU 14-1-1893-76 in steel 08Х20Н5АГ12МФ (ДИ8), deviations in the mass fraction of elements are allowed: by carbon + 0.010%, by nickel + 0.50%, by nitrogen -0.020%, sulfur + 0.5050%, for phosphorus +0.0050%.
Technological properties
| Name |
The value |
| Macrostructure and pollution |
The macrostructure of the steel on the other 14-1-1893-76 on cross etched templeto cut from billets and forgings should not have shrinkage, porosity, bubbles, cracks and inclusions that are visible without using the magnifying devices. |
| Corrosion resistance |
Arbitration test steel to intergranular corrosion produced in plavochek control according to GOST 6032 method AMU, if the duration of boiling of the samples for 24 hours, after heat treatment of the samples in regime: Quenching in water from 1030-1050 °C (aging 1 HR) + provoking Subsequent heating to 650 °C (aging for 1 h), air cooling. |
