03Х18Н12 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 fittings; spark electrodes incendiary spark; the electronics industry; nets with square mesh used for the control and separation of materials by particle size, filtration of liquids, gases and other purposes; cold-rolled strip intended for deep drawing products, electronic industry.

Note

Steel corrosion resistant austenitic class.

Standards

Name	Code	Standards
Tape	В34	GOST 4986-79, TU 14-1-3502-82, TU 14-1-3386-82
Sheets and strips	В33	GOST 5582-75, TU 14-105-451-86, TU 14-1-4353-87
Classification, nomenclature and General rules	В30	GOST 5632-72
Blanks. Of the workpiece. Slabs	В31	OST 3-1686-90, TU 14-1-1046-74, TU 14-1-1924-76
Welding and cutting metals. Soldering, riveting	В05	TU 14-1-656-73
Bars and shapes	В32	TU 14-11-245-88
Wire, steel, alloy	В73	TU 14-173-64-95
Steel pipes and fittings to them	В62	TU 14-3-1120-82
Mesh metal	В76	TU 14-4-507-99

Chemical composition

Standard	C	S	P	Mn	Cr	Si	Ni	Fe	Cu	N	V	Ti	Mo	W	O
TU 14-1-656-73	≤0.03	≤0.02	≤0.03	≤0.4	17-19	≤0.4	11.5-13	Rest	≤0.2	≤0.03	≤0.2	≤0.005	≤0.3	≤0.2	≤0.006
TU 14-1-4353-87	≤0.03	≤0.02	≤0.03	≤0.4	17-19	≤0.4	11.5-13	Rest	≤0.3	-	≤0.2	≤0.005	≤0.3	≤0.2	-
GOST 5582-75	≤0.03	≤0.02	≤0.03	≤0.4	17-19	≤0.4	11.5-13	Rest	≤0.3	≤0.03	≤0.2	≤0.005	≤0.3	≤0.2	≤0.006

Fe is the basis.
According to GOST 5582-75 the chemical composition is given for steel grade 03H18N12-VI with nitrogen and oxygen restriction (at the request of the consumer).
According to GOST 4986-79 in the steel grade 03H18N12-VI the mass fraction of oxygen should not exceed 0.006%, nitrogen 0.030%, copper 0.20%.
According to TU 14-1-656-73 the chemical composition is given for steel grade 03H18N12.
According to TU 14-1-4353-87, the chemical composition is given for steel 03Х18Н12-ВИ.

Mechanical properties

Section, mm	σ_U, MPa	d₅, %	d₄	y, %
Cold-rolled steel strip of 0.05-2.00 mm according to GOST 4986-79 on delivery
0.2-2	≥740	-	≥5	-
0.2	≥740	-	≥3	-
Cold-rolled steel strip of 0.05-2.00 mm according to GOST 4986-79. Quenching in water or air from 1050-1080 °C (samples)
0.2-2	≥390	-	≥40	-
0.2	≥390	-	≥20	-
Hot rolled sheet (of 1.5-3.9 mm) and cold rolled (0,7-3,9 mm) steel according to GOST 5582-75. Without heat treatment
-	≥740	≥12	-	-
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
-	≥390	≥40	-	-
Bars hot rolled and forged on the other 14-1-656-73. The longitudinal samples. Quenching in water from 1000-1050 °C
	≥392	≥50	-	≥65

Description mechanical marks

Name	Description
σ_U	Limit short-term strength
d₅	Elongation after rupture
d₄	Elongation after rupture
y	The relative narrowing

Technological properties

Name	The value
Microstructure	The content of ferritic phase in rods with a diameter or a side of a square of 80 mm or more must not exceed 0.5 points (1-2 %) Rods with a diameter or side of less than 80 mm and the strip is not subjected to a determination of the ferritic phase.

Steel 03Х18Н12 (000Х18Н12)

Designation

Description