Steel 08Х20Н5АГ12МФ (ДИ8)

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.