Steel 10Х23Н18 (0Х23Н18)

Designation

Name	The value
Name	The value
Designation GOST Cyrillic	10Х23Н18
Designation GOST Latin	10X23H18
Transliteration	10H23N18
By chemical elements	10Cr23Н18

Name	The value
Name	The value
Designation GOST Cyrillic	0Х23Н18
Designation GOST Latin	0X23H18
Transliteration	0H23N18
By chemical elements	0Cr23Н18

Description

10Х23Н18 steel is used: for the manufacture of sheet metal parts, pipes, fittings (at low loads), operating at +1000 °C; pipes and fittings installations of methane conversion and pyrolysis; aviation parts; all connections of equipment installed in radioactive environments.

Note

Heat-resistant steel and heat resistant austenitic class.
The recommended maximum operating temperature for a long time +1000 °C.
Temperature intense scaling in air +1050 °C.
In the temperature range 600−800 °C is prone to embrittlement due to the formation of σ-phase.

Standards

Name	Code	Standards
Name	Code	Standards
Bars and shapes	В22	GOST 1133-71, GOST 2590-2006, GOST 2591-2006, GOST 2879-2006
Sheets and strips	В23	GOST 19903-74, GOST 103-2006, GOST 19903-90
Processing of metals by pressure. Forgings	В03	GOST 25054-81
Sheets and strips	В33	GOST 4405-75
Classification, nomenclature and General rules	В30	GOST 5632-72
Bars and shapes	В32	GOST 5949-75, GOST 7417-75, GOST 8559-75, GOST 8560-78, GOST 14955-77, TU 14-1-377-72, TU 14-11-245-88
Steel pipes and fittings to them	В62	GOST 9940-81, GOST 9941-81, TU 14-158-135-2003, TU 14-158-137-2003, TU 14-3-1654-89
Blanks. Of the workpiece. Slabs	В21	OST 1 90176-75
Blanks. Of the workpiece. Slabs	В31	OST 3-1686-90, TU 14-1-565-84
Welding and cutting metals. Soldering, riveting	В05	OST 95 10441-2002
Thermal and thermochemical treatment of metals	В04	STP 26.260.484-2004

Chemical composition

Standard	C	S	P	Mn	Cr	Si	Ni	Fe	Cu	V	Ti	Mo	W
Standard	C	S	P	Mn	Cr	Si	Ni	Fe	Cu	V	Ti	Mo	W
GOST 5632-72	≤0.1	≤0.02	≤0.035	≤2	22-25	≤1	17-20	Rest	≤0.3	≤0.2	≤0.2	≤0.3	≤0.2
TU 14-158-137-2003	≤0.1	≤0.02	≤0.035	≤2	22-25	≤1	17-20	Rest	-	-	-	-	-

Fe is the basis.
According to TU 14-158-137-2003, cerium and other rare-earth metals can be introduced by 0.2-0.3%, which are not determined by chemical analysis.

Mechanical properties

Section, mm	s_T\|s_0,2, MPa	σ_U, MPa	d₅, %	y, %	HB, MPa
Section, mm	s_T\|s_0,2, MPa	σ_U, MPa	d₅, %	y, %	HB, MPa
Annealing in air or in water from 1100-1150 °C (samples transverse)
≥4	≥175	≥490	≥40	≥55	-
0.2-22	-	≥529	≥35	-	-
Sheets hot - and cold-rolled. Annealing in air or in water 1080-1150 °C (samples transverse)
≤3.9	-	≥510	≥35	-	-
Forgings up to 1000 mm. Hardening in air or in water from 1000-1050 °C
	≥196	≥490	≥35	≥40	≥179
Bars hot rolled and forged according to GOST 5949-75. Annealing in air or in water 1100-1150 °C
	≥196	≥490	≥35	≥50	-
Bars hot rolled and forged at STP 26.260.484-2004. Quenching in water or air from 1100-1150 °C
	≥200	≥500	≥35	≥40	-
Hot-deformed seamless tubes in the delivery condition (specified wall thickness)
3.5-32	-	≥491	≥37	-	-
Cold-rolled tubes after austenization on delivery
	-	≥529	≥35	-	-
Forming at OST 1 90176-75. Quenching in water or air from 1100-1150 °C
	≥216	≥569	≥35	≥50	-

Description mechanical marks

Name	Description
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
y	The relative narrowing
HB	Brinell hardness number

Physical characteristics

Temperature	r, kg/m³
Temperature	r, kg/m³
0	7950

A description of the physical symbols

Name	Description
Name	Description
Е	The normal elasticity modulus
r	Density
l	Coefficient of thermal conductivity
R	UD. the resistivity

Technological properties

Name	The value
Name	The value
Weldability	recommended for NPP equipment for automatic arc welding submerged arc, manual arc welding with coated electrodes, combined welding methods
Склонность к отпускной хрупкости	inclined
Features of heat treatment	Steel products, designed for operation in conditions of increased requirements for heat resistance and heat resistance, are subjected to quenching in water or air at 1100-1150 °C. the 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.