03Х23Н6 steel is used: for the manufacture of equipment for chemical engineering; welded capacitive equipment used in the production of nitric acid, ammonium nitrate, adipic acid; welding electrodes; connections for equipment operating in radioactive environments and do not come in contact with aggressive environment.

Note

Austenite corrosion resistant steel-ferritic class.
03Х23Н6 steel has higher strength compared with steel grades 08KH18N10T and 03Х18Н11. 03Х23Н6 steel has a high resistance to stab corrosion in the weld joint and it can also replace steel grades 03Х19АГ3Н10, Х18Н9Т, 18CR10NITI, 08KH22N6T.

Standards

Name	Code	Standards
Classification, nomenclature and General rules	В30	GOST 5632-72
Sheets and strips	В33	GOST 7350-77, TU 14-1-1905-76, TU 14-1-1541-75
Blanks. Of the workpiece. Slabs	В31	OST 3-1686-90
Welding and cutting metals. Soldering, riveting	В05	OST 95 10441-2002
Bars and shapes	В32	TU 14-1-1554-75, TU 14-11-245-88

Chemical composition

Standard	C	S	P	Mn	Cr	Si	Ni	Fe	Cu	V	Ti	Mo	W
GOST 7350-77	≤0.03	≤0.02	≤0.035	1-2	22-24	≤0.4	5.6-6.3	Rest	≤0.3	≤0.2	≤0.05	≤0.3	≤0.2
GOST 5632-72	≤0.03	≤0.02	≤0.035	1-2	22-24	≤0.4	5.3-6.3	Rest	≤0.3	≤0.2	≤0.05	≤0.3	≤0.2
TU 14-1-1541-75	≤0.03	≤0.02	≤0.035	1-2	22-24	≤0.4	5.6-6.3	Rest	-	-	≤0.05	-	-

Fe is the basis.
According to GOST 7350-77, the deviation by mass fraction of silicon is allowed in the finished rolled steel +0.40%, sulfur +0.005%, nickel ± 0.20%, chromium +0.5%. The mass fraction of residual titanium is not more than 0,050%, other residual elements - according to GOST 5632.
According to TU 14-1-1541-75 the chemical composition is given for steel grade 03H23N6 (ZI68). The tolerance for silicon content is + 0.40%, sulfur + 0.0050%. The deviation from the nickel content is ± 0.20%, chromium + 0.50%. The content of other residual elements is according to GOST 5632.

Mechanical properties

Section, mm	s_T\|s_0,2, MPa	σ_U, MPa	d₅, %
Hot rolled sheet (4,0-50,0 mm) and cold rolled (4,0-5,0 mm) steel according to GOST 7350-77. Quenching in water from 1030-1050 °C
-	≥345	≥590	≥25
Sheet hot-rolled steel in the delivery state on the other 14-1-1541-75. Quenching in water from 1000-1025 °C
4-11	≥343	≥588	≥25

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

Technological properties

Name	The value
Weldability	manual argon arc welding with non-consumable electrode (filler or without filler material), automatic arc welding under flux

Steel 03Х23Н6 (ЗИ68)

Designation

Description