Steel 07Х15Н30В5М2 (ЧС81)
Designation
| Name |
The value |
| Designation GOST Cyrillic |
07Х15Н30В5М2 |
| Designation GOST Latin |
07X15H30B5M2 |
| Transliteration |
07H15N30V5M2 |
| The chemical elements |
07Cr15Н30W5Mo2 |
| Name |
The value |
| Designation GOST Cyrillic |
ЧС81 |
| Designation GOST Latin |
ChC81 |
| Transliteration |
ChS81 |
| The 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 stripes |
В33 |
TU 14-1-4441-88 |
| Sectional and shaped rolling |
В32 |
TU 14-1-4915-90 |
| Metal forming. Forgings |
В03 |
TU 14-1-4916-90 |
| Bulls. Blanks. 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 |
The 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 |
The 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 characteristics
| Section, mm |
sT|s0,2, MPa |
σB, 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 |
| Section |
Section |
| sT|s0,2 |
Yield strength or limit of proportionality with a tolerance for residual deformation of 0.2% |
| σB |
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 contamination |
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. |
