09Х18Н9 steel is used: for the production of billets; hot rolled seamless tubes for shipbuilding outer diameter 108−325 mm; electropolishing cold-deformed seamless tubes (including the facilities and equipment of nuclear power); seamless cold-deformed pipes with an outer diameter of 108−194 with a high surface quality for power.

Note

Stainless steel with controlled ferrite.

Standards

Name	Code	Standards
Processing of metals by pressure. Forgings	В03	ST ЦКБА 010-2004
Blanks. Of the workpiece. Slabs	В31	TU 14-1-1288-75, TU 14-1-3119-81
Bars and shapes	В32	TU 14-1-1326-75
Sheets and strips	В33	TU 14-1-3409-82
Steel pipes and fittings to them	В62	TU 14-3-1061-81, TU 14-3-52-72, TU 14-3-760-78, TU 14-159-295-2004, TU 14-161-216-2003, TU 14-3-1233-84, TU 14-3-1956-94

Chemical composition

Standard	C	S	P	Mn	Cr	Si	Ni	Fe	Cu	Ti
TU 14-159-295-2004	0.07-0.1	≤0.02	≤0.02	1-2	17-19	≤0.8	8-10	Rest	≤0.3	≤0.1
TU 14-1-3119-81	0.07-0.1	≤0.02	≤0.02	1-2	17-19	≤0.8	8-10	Rest	≤0.25	≤0.1

Fe is the basis.
According to TU 14-161-216-2003, TU 14-3-1956-94 and TU 14-159-295-2004 the allowable deviation in the content of C (carbon) is minus 0.01%. Residual content of elements in the chemical composition of steel - according to GOST 5632.
According to TU 14-1-3119-81 for steel grade 09H18N9, deviations in chemical composition are allowed: by carbon-0.010%, molybdenum ± 0.050%, vanadium ± 0.050%. The content of impurities of non-ferrous metals (tin, arsenic, lead, zinc, antimony, bismuth) should not exceed the 1 st point of a ten-point scale of spectral analysis. The content of residual elements in steel should be in accordance with GOST 5632.

Mechanical properties

Section, mm	s_T\|s_0,2, MPa	σ_U, MPa	d₅, %
The tubular billet. Quenching in water from 1050-1080 °C, cooling in water or air on the other 14-1-1288-75
	≥196	≥490	≥50
	≥98	≥294	≥30
Tubes seamless cold-drawn heat-treated in the delivery condition on the other 14-159-295-2004, THE 14-161-216-2003
	≥196	≥490	≥40
	≥98	≥294	≥22
Pipe heat-treated in the delivery condition on the other 14-3-1956-94
	≥196	≥490	≥40
	≥98	≥245	≥28

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
Macrostructure and pollution	Contamination of the metal pipes, non-metallic inclusions on the other 14-159-295-2004 should be on the maximum score: - Oxides (FROM, OS) ≤ 4 points; - Sulphides (S) ≤ 3 points; - Silicates (CX, SP) - 3 points; - Silicates, non-deformed ≤ 4 points.
Microstructure	On the other 14-3-1956-94, THE 14-159-295-2004 the ferrite content in the steel should be in the range 1.0-4.0%. Grain size of the metal pipes on the other 14-159-295-2004 in the state of delivery should be not larger than 5 rooms.
Particularities of production of goods	Tubes are delivered in heat-treated (austenitisation) and the reign of the state and must be subjected to radiographic inspection. On the other 14-159-295-2004 pipes up to 40 mm inclusive must pass the test to the distribution to increase the outer diameter by 10% a mandrel with the taper angle 30° and must withstand a hydraulic test pressure in accordance with GOST 3845 with allowable stress equal to 40% of the strength of steel. The ability of pipe to withstand hydraulic test pressure is provided by the production technology and can be guaranteed by the manufacturer without testing.

Steel 09Х18Н9

Designation

Description