Steel 03Х18Н11 (000Х18Н11)

Designation

Name	The value
Designation GOST Cyrillic	03Х18Н11
Designation GOST Latin	03X18H11
Transliteration	03H18N11
By chemical elements	03Cr18Н11

Name	The value
Designation GOST Cyrillic	000Х18Н11
Designation GOST Latin	000X18H11
Transliteration	000H18N11
By chemical elements	000Cr18Н11

Description

03Х18Н11 steel is used: for the manufacture of welded equipment operating in environments of increased aggressiveness (nitric acid, nitrate environments, acetic acid, alkaline solutions and salts); heat exchangers, muffles, pipes, fittings furnace parts, electrodes incendiary spark candles; a tube blank; parts are resistant to organic and fruit acid in the manufacture of food products, Soaps, oils and artificial fibres; equipment resistant to 70% nitric acid, adipic acid, ammonium nitrate at operation temperatures up to +300 °C; of apparatus in chemical engineering; hulls and bottoms, flat flanges; for all connections of equipment installed in radioactive environments and in contact with aggressive environment.

Note

Low carbon steel corrosion resistant austenitic class.

Standards

Name	Code	Standards
Bars and shapes	В22	GOST 1133-71
Processing of metals by pressure. Forgings	В03	GOST 25054-81
Sheets and strips	В33	GOST 5582-75, GOST 7350-77, TU 14-105-451-86, TU 14-1-4780-90, TU 14-1-5073-91, TU 14-1-3071-80, TU 14-1-490-72, TU 14-1-5142-92, TU 14-1-2144-77
Classification, nomenclature and General rules	В30	GOST 5632-72
Bars and shapes	В32	GOST 5949-75, TU 14-1-1160-74, TU 14-11-245-88
Blanks. Of the workpiece. Slabs	В31	OST 3-1686-90, TU 14-1-3183-81, TU 14-1-3931-84, TU 14-1-2132-77
Welding and cutting metals. Soldering, riveting	В05	OST 95 10441-2002
Thermal and thermochemical treatment of metals	В04	STP 26.260.484-2004
Tape	В34	TU 14-1-3386-82
Steel pipes and fittings to them	В62	TU 14-1-5410-2001, TU 14-158-135-2003, TU 14-158-137-2003

Chemical composition

Standard	C	S	P	Mn	Cr	Si	Ni	Fe	Cu	V	Ti	Mo	W
GOST 5632-72	≤0.03	≤0.02	≤0.03	0.7-2	17-19	≤0.8	10.5-12.5	Rest	≤0.3	≤0.2	≤0.05	≤0.3	≤0.2
TU 14-158-137-2003	≤0.03	≤0.02	≤0.03	0.7-2	17-19	≤0.8	10.5-12.5	Rest	-	-	≤0.05	≤0.3	-

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, %
Hot rolled sheet (of 1.5-3.9 mm) and cold rolled (0,7-3,9 mm) steel according to GOST 5582-75. Quenching in water or air from 1050-1080 °C
-	≥196	≥490	≥40	-
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 or air with 1080-1100 °C
-	≥196	≥490	≥40	-
Forgings up to 1000 mm. Hardening in air, 1020-1100 °C
	≥176	≥441	≥40	≥45
Bars hot rolled and forged according to GOST 5949-75. Quenching in air, oil or water with 1020-1100 °C
	≥155	≥440	≥40	≥55
Bars hot rolled and forged at STP 26.260.484-2004. Quenching in water or air from 1050-1100 °C
	≥200	≥520	≥45	≥50
Heavy-gauge hot-rolled steel in the delivery state on the other 14-1-5073-91. Quenching in water or under a water shower with 1080-1100 °C
20-50	≥196	≥490	≥40	-
The tubular billet. Quenching in water with 1050-1120°C
	≥157	≥451	-	-
Cold-rolled tubes after austenization on delivery
	-	≥460	≥45	-

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
y	The relative narrowing

Physical characteristics

Temperature	r, kg/m³
20	7900

A description of the physical symbols

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

Technological properties

Name	The value
Weldability	Automatic arc welding with non-consumable electrode in a continuous mode, manual argon arc welding with non-consumable electrode (filler or without filler material). Allowed the use of automatic arc welding submerged arc and manual arc welding with coated electrodes.
Microstructure	The content of alpha-phase should not exceed 1.0%.
Features of heat treatment	Steel products intended for use in aggressive environments and can be tempered, annealed. To ensure high corrosion resistance and an optimal combination of strength and plasticity of steel products are subjected to hardening from 1050-1100 °C and cooled in water or air. 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. In order to remove residual stresses resulting from the plastic deformation and welding, and also prevent warpage and stress corrosion cracking products is subjected to annealing at 870-900 °C, exposure time of 2-3 h, cooling with the furnace to 300 °C (speed of 50-100 °C/h), then - on the air.
Corrosion resistance	The steel is resistant to nitrous gases at temperatures up to +80 °C. Steel 03Х18Н11 has a high resistance to intergranular corrosion than steel of the brand 08KH18N10T and a high resistance to stab corrosion than steel of the brand 12Х18Н12Б.