Steel 07Х15Н30В5М2 (ЧС81)

Designation

Name	The value
Designation GOST Cyrillic	07Х15Н30В5М2
Designation GOST Latin	07X15H30B5M2
Transliteration	07H15N30V5M2
By chemical elements	07Cr15Н30W5Mo2

Name	The value
Designation GOST Cyrillic	ЧС81
Designation GOST Latin	ChC81
Transliteration	ChS81
By chemical elements	ZrС81

Description

07Х15Н30В5М2 steel is used: for the production of billets with a diameter of 90−180 mm; long products and hot-rolled flat steel for the manufacture of parts of special equipment; pipes for power plants.

Standards

Name	Code	Standards
Sheets and strips	В33	TU 14-1-4441-88
Bars and shapes	В32	TU 14-1-4915-90
Processing of metals by pressure. Forgings	В03	TU 14-1-4916-90
Blanks. Of the workpiece. Slabs	В31	TU 14-1-4930-90

Chemical composition

Standard	C	S	P	Mn	Cr	Si	Ni	Fe	Cu	N	Al	Ti	Mo	W	Y
TU 14-1-4915-90	≤0.07	≤0.01	≤0.015	1.3-1.7	14-17	≤0.2	29-31	Rest	≤0.08	≤0.03	≤0.12	≤0.06	1.8-2.2	4.5-5.5	0.05
TU 14-1-4441-88	≤0.07	≤0.01	≤0.015	0.8-1.2	14-17	≤0.2	29-31	Rest	≤0.08	≤0.03	≤0.12	≤0.06	1.8-2.2	4.5-5.5	≤0.05

Fe is the basis.
According to TU 14-1-4441-88 the chemical composition is given for steel grade 07H15N30V5M2-VI (CS81-VI).
According to TU 14-1-4930-90 the chemical composition is given for steel grade 07H15N30V5M2-VI (ChS81-VI), melted in vacuum induction furnaces. The yttrium content is not calculated and chemical analysis. The permissible deviation from the mass fraction of silicon is +0,080%. The permissible deviations from the standards of the chemical composition of the remaining elements and the mass fraction of the residual elements must comply with GOST 5632. Calcium can be introduced into the steel by calculation of 0.10%, magnesium by 0.050%, the content of which is not determined by chemical analysis.
According to TU 14-1-4915-90 the chemical composition is given for steel grade 07H15N30V5M2-ID (ChS81-ID). Yttrium is introduced into the metal by calculation and chemical analysis is not determined. The maximum deviations from the norms of chemical composition and the mass fraction of the residual elements are in accordance with GOST 5632.

Mechanical properties

Section, mm	s_T\|s_0,2, MPa	σ_U, MPa	d₅, %	y, %
Bars forged and hot rolled on the other 14-1-4915-90. Austenization at a temperature of 1100-1120, air cooling
20-25	≥216	≥490	≥35	≥60
20-25	≥98	≥147	≥30	≥55
Pipe forged billet according to TU 14-1-4930-90. Austenization at 1100-1120 °C, air cooling (longitudinal samples of the T/a round or square billet cross section 15-20 mm)
15-20	≥215	≥495	≥35	≥60
15-20	≥98	≥150	≥30	≥55

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

Technological properties

Name	The value
Pressure treatment	Of forging of billets on the other 14-1-4930-90 should be at least 2,50.
Macrostructure and pollution	In the macrostructure of steel billets on the other 14-1-4930-90 on the etched transverse templeto should not be intercrystalline cracks, subcortical bubbles, podnasadochnogo looseness, residues shrinkage, non-metallic microflute, bundles for forging and intergranular cracks and other defects visible to the naked eye. Permitted in the macrostructure of the Central porosity, point heterogeneity and phase separation of the square is not more than the second score according to GOST 10243. The tubular billet is checked for contamination of metal non-metallic inclusions, which should not exceed (maximum score) rules: - sulphides (S) - 2.0 points; -oxides of stroke (OS) - 4.0 points; - point oxides (FROM) - 1.0 points; - silicates fragile (CX) - 1.0 points; - silicates plastic (SP) - 1.0 points; - silicates, non-deformed (CH) - 1.0 points; - nitrides (N) - 2.5 points. The pollution of steel bars on the other 14-1-4915-90 non-metallic inclusions is controlled by the maximum score: - sulphides (C) - 1.0 points; -oxides of stroke (OS) - 2.5 points; - point oxides (FROM) - 1.0 points; - silicates fragile (CX) - 1.0 points; - silicates plastic (SP) - 1.0 points; - silicates, non-deformed (CH) - 1.0 points; - nitrides and carbonitrides point (NT) - 1.5 points; - nitrides and carbonitrides stroke (NA) - 2.0 points.