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	s_T\|s_0,2, MPa	σ_U, 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
s_T\|s_0,2	Yield strength or limit of proportionality with a tolerance for residual deformation of 0.2%
σ_U	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.

Steel 02Х8Н22С6 (ЭП794)

Designation

Description