Steel 02Х8Н22С6 (ЭП794)

Designation

Name The value
Designation GOST Cyrillic 02Х8Н22С6
Designation GOST Latin 02X8H22C6
Transliteration 02H8N22S6
By chemical elements 02Cr8Н22С6
Name The value
Designation GOST Cyrillic ЭП794
Designation GOST Latin EP794
Transliteration EhP794
By chemical elements -

Description

02Х8Н22С6 steel is used: for the production of chemical equipment operating in the environment of concentrated nitric acid at elevated temperature; welding wire.

Note

Low carbon steel corrosion resistant heat resistant Nickel-containing austenitic.
The steel is melted only by special methods — sh, PD, and ID.

Standards

Name Code Standards
Thermal and thermochemical treatment of metals В04 STP 26.260.484-2004
Blanks. Of the workpiece. Slabs В31 TU 14-1-3164-81
Welding and cutting metals. Soldering, riveting В05 TU 14-1-3233-81
Bars and shapes В32 TU 14-1-3812-84
Sheets and strips В33 TU 14-1-5075-91, TU 14-1-5076-91
Steel pipes and fittings to them В62 TU 14-3-1024-81

Chemical composition

Standard C S P Mn Cr Si Ni Fe
TU 14-3-1024-81 ≤0.02 ≤0.02 ≤0.03 ≤0.6 7.5-10 5.4-6.7 21-23 Rest
Fe is the basis.
According to TU 14-3-1024-81, TU 14-1-3812-84 the chemical composition is given for steel grade 02Х8Н22С6 (EP794).
According to TU 14-1-3164-81 the chemical composition is given for steel grade 02X8N22S6 (EP794). Deviations in the carbon content by +0.010%, chromium, nickel and silicon by ± 0.10 each are allowed.
According to TU 14-1-3812-84 the chemical composition is given for steel grade 02Х8Н22С6 (EP794). Deviations in the content of chromium, nickel, silicon ± 0.10% each, carbon + 0.010% are allowed in the finished product. Limit deviations and the content of residual elements - according to GOST 5632.

Mechanical properties

Section, mm sT|s0,2, MPa σU, MPa d5, % KCU, kJ/m2
The billet according to TU 14-1-3164-81. The longitudinal samples. Quenching in water from 1050 °C
≥176 ≥568 ≥45 -
Bars on the other 14-1-3812-84. Quenching in water from 1050 °C
≥176 ≥519 ≥60 ≥690
Bars hot rolled and forged at STP 26.260.484-2004. Quenching in water from 1050-1070 °C
≥200 ≥540 ≥40 -
Pipe cold and warm in the delivery condition on the other 14-3-1024-81
≥196 ≥588 ≥35 -

Description mechanical marks

Name Description
sT|s0,2 Yield strength or limit of proportionality with a tolerance for residual deformation of 0.2%
σU Limit short-term strength
d5 Elongation after rupture
KCU Toughness

Technological properties

Name The value
Macrostructure and pollution In the macrostructure of the billets on the other 14-1-3164-81 not toproceed traces of shrinkage, porosity, subcortical bubbles, cracks, foreign non-metallic inclusions, delaminations visible to the naked eye. The norm of non-metallic inclusions by the maximum score shall not exceed : oxides of stroke - 4,0, oxides of point - 2,0, silicates fragile - 4,0, silicates plastic - 1,0,, non-deformed silicates - 1,0, sulphides and 1.0.
Features of heat treatment The product of the steel subjected to quenching in water from 1050 °C. holding Time at the heating for hardening to products with a wall thickness up to 10 mm - 30 min, over 10 mm - 20 min + 1 min per 1 mm maximum thickness.