Designation
| Name |
The value |
| Designation GOST Cyrillic |
10Х18Н9 |
| Designation GOST Latin |
10X18H9 |
| Transliteration |
10H18N9 |
| By chemical elements |
10Cr18Н9 |
Description
10Х18Н9 steel is used: for the production of billets; of forgings of various parts of General machinery; parts of NPP equipment.
Note
Stainless steel with controlled ferrite. The content of ferritic phase in the range 1.0−4.0%.
Standards
| Name |
Code |
Standards |
| Processing of metals by pressure. Forgings |
В03 |
TU 108.11.937-87, TU 108.11.917-87, ST ЦКБА 010-2004 |
| Blanks. Of the workpiece. Slabs |
В31 |
TU 14-1-1288-75, TU 14-1-2797-79 |
| Wire, steel, alloy |
В73 |
TU 14-4-129-73 |
Chemical composition
| Standard |
C |
S |
P |
Mn |
Cr |
Si |
Ni |
Fe |
Cu |
Ti |
| TU 14-1-1288-75 |
0.08-0.12 |
≤0.02 |
≤0.02 |
1-2 |
17-19 |
≤0.8 |
8-10 |
Rest |
≤0.3 |
≤0.1 |
| TU 108.11.917-87 |
≤0.1 |
≤0.02 |
≤0.025 |
1-2 |
17-19 |
≤0.8 |
8-10 |
Rest |
≤0.25 |
≤0.1 |
Fe is the basis.
According to TU 108.11.937-87, the chemical composition is given for steel grades 10Х18Н9, 10Х18Н9-ВД, 10Х18Н9-Ш. Deviations in chemical composition are allowed: for carbon + 0.010%, for silicon + 0.10%, for chromium ± 0.20%, for nickel + 0.20%, for titanium and copper + 0.050% for each, for manganese -0, 40% for VDP smelting and -0.30% for other methods of smelting. Determination of nitrogen is carried out. The results are determined, but are not delivery, but are recorded in the certificate.
Mechanical properties
| sT|s0,2, MPa |
σU, MPa |
d5, % |
y, % |
| The tubular billet. Quenching in water from 1050-1080 °C, cooling in water or air on the other 14-1-1288-75 |
| ≥225 |
≥490 |
≥40 |
≥50 |
| Sheets, sheet blanks, stamped sheet blanks supplied for THAT 108.11.937-87. Samples of the cross |
| ≥195 |
≥490 |
≥50 |
≥50 |
| The tubular billet. Quenching in water from 1050-1080 °C, cooling in water or air on the other 14-1-1288-75 |
| ≥147 |
- |
- |
- |
| Sheets, sheet blanks, stamped sheet blanks supplied for THAT 108.11.937-87. Samples of the cross |
| ≥125 |
≥325 |
≥30 |
≥50 |
| ≥120 |
≥325 |
≥30 |
≥50 |
| ≥100 |
≥325 |
≥30 |
≥50 |
| Forging as supplied on the other 108.11.937-87. Samples longitudinal or tangential |
| ≥195 |
≥490 |
≥45 |
≥55 |
| ≥125 |
≥295 |
≥30 |
≥50 |
| ≥120 |
≥295 |
≥30 |
≥50 |
| ≥100 |
≥295 |
≥30 |
≥50 |
Description mechanical marks
| Name |
Description |
| sT|s0,2 |
Yield strength or limit of proportionality with a tolerance for residual deformation of 0.2% |
| σU |
Limit short-term strength |
| d5 |
Elongation after rupture |
| y |
The relative narrowing |
Technological properties
| Name |
The value |
| Macrostructure and pollution |
On the other 108.11.937-87 value of non-metallic inclusions were determined according to GOST 1778 shall not exceed: steel grades 10Х18Н9 and 10Х18Н9-W - oxides, sulphides and silicates 3.0 points, nitrides and carbonitrides 3.5 points; steel grade 10Х18Н9-VD - oxides and sulphides - 2.0 points, silicates - 2.5 points, nitrides and carbonitrides - 3.5 points. |
| Microstructure |
On the other 108.11.937-87 content of the ferritic phase in steel should be in the range of 1-4%. Tolerance of ferritic phase +2,0/-0,5%. |
