Steel 06Х16Н15М3Б (ЭИ847; 06Х16Н15М3Б)

Designation

Name	The value
Designation GOST Cyrillic	06Х16Н15М3Б
Designation GOST Latin	06X16H15M3B
Transliteration	06H16N15M3B
By chemical elements	06Cr16Н15Mo3Nb

Name	The value
Designation GOST Cyrillic	ЭИ847
Designation GOST Latin	EI847
Transliteration	EhI847
By chemical elements	-

Description

06Х16Н15М3Б steel is used: for the manufacture of pipes of the superheaters and steam pipelines of high pressure and nuclear power plants, continuously operating at temperatures up to +350 °C.

Note

Steel heat-resistant austenitic class.
The recommended maximum operating temperature for a very long time +350 °C.
The temperature of beginning of intensive scaling in air +850 °C.

Standards

Name	Code	Standards
Blanks. Of the workpiece. Slabs	В31	OST 3-1686-90, TU 14-131-960-2001
Bars and shapes	В32	TU 14-1-2694-79, TU 14-11-245-88, TU 14-1-1115-2004
Steel pipes and fittings to them	В62	TU 14-159-165-87, TU 14-3-1041-81, TU 14-3-1070-81, TU 14-3-1077-81, TU 14-3-1511-87, TU 14-3-219-89, TU 14-3-958-80, TU 14-159-293-2005

Chemical composition

Standard	C	S	P	Mn	Cr	Si	Ni	Fe	Cu	N	As	B	Ti	Mo	Sn	Sb	Pb	Bi	Nb	Co
TU 14-1-1115-2004	0.04-0.06	≤0.015	≤0.02	≤0.8	15-17	≤0.4	14-16	Rest	-	-	-	-	-	2.7-3.3	-	-	-	-	0.4-0.9	-
TU 14-1-2694-79	0.04-0.06	≤0.01	≤0.015	0.4-0.8	15-16	0.3-0.6	15-16	Rest	≤0.05	≤0.025	≤0.001	≤0.001	≤0.05	2.7-3.2	≤0.001	≤0.001	≤0.001	≤0.0001	≤0.9	≤0.02
TU 14-3-1511-87	0.04-0.06	≤0.01	≤0.015	0.4-0.8	15-17	0.3-0.6	14-16	Rest	-	-	-	-	-	2.7-3.2	-	-	-	-	0.4-0.9	-

Fe is the basis.
According to TU 14-3-1511-87, the chemical composition is given for steel grade 06H16N15M3B-ISH (-ID).
According to TU 14-1-1115-2004, the chemical composition is given for steel grade 06H16N15M3B-SH, 06H16N15M3B-VD. The ratio of the content of niobium to carbon should be in the range of 9 ÷ 13. Deviations in chemical composition are allowed: for niobium +0.20%, for carbon + 0.010 / -0.0050%, for silicon +0.20%. It is acceptable to reduce the ratio of niobium to carbon to 8.0.
According to TU 14-1-2694-79, the chemical composition is given for steel grades 06H16N15M3B-ID (EI847-ID) and 06H16N15M3B-ISH (EI847-ISH). The content of cobalt, copper, bismuth, lead, titanium and boron on the first 30 batches is optional, but is entered in the certificate. The technological additive of vanadium is acceptable up to 0.30%. The actual residual content of vanadium is indicated in the certificate. The ratio of the content of niobium to carbon should be in the range from 9 to 14. In the finished metal, subject to the specifications, the tolerance for the content of elements is permissible: carbon + 0.010%, phosphorus + 0.0050%, silicon + 0.10%, manganese +0 , 20%, phosphorus + 0.0050%, chromium + 0.50%, nickel + 0.50%, copper + 0.050%, boron + 0.0010%, nitrogen + 0.010%.

Mechanical properties

Section, mm	s_T\|s_0,2, MPa	σ_U, MPa	d₅, %
Black bars, hot-rolled, calibrated and with special surface finish and wrought iron bars on the other 14-1-1115-2004. Austenization 1060-1100 °C air cooling or water
	≥216	≥539	≥30
The billet according to TU 14-1-2694-79. The longitudinal samples. Annealing in air or in water 1050-1100 °C
	≥216	≥539	≥35
	≥176	≥372	≥25
	≥147	≥333	≥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	In the macrostructure of the workpiece on the other 14-1-2694-79 in the state of delivery should be free of cracks, gas bubbles, subcortical bubbles, turns brown, bundles, traces of shrinkage, inclusions, visible to the naked eye. Under the control of the workpiece on the transverse microtemplate valid Central porosity, point heterogeneity and phase separation in the square no more than 1.0 points. Layer-by-layer crystallization and the square of the increased travelmasti is not a rejection symptom. In the metal tube blank, the content of nonmetallic inclusions shall not exceed the maximum score on the scale GOST 1778: sulphide - 1.0 points, oxides of point - 2.0 points, oxides and silicates stroke - 2.0 points, silicates unde - 1.0 points. In the metal tube blank and the content of the stroke of nitride and carbonitride phases of niobium should not exceed the maximum score on the scale GOST 1778 2.5 points.