Steel 110Х18М (110Х18М-SM)
Designation
| Name |
The value |
| Designation GOST Cyrillic |
110Х18М |
| Designation GOST Latin |
110X18M |
| Transliteration |
110H18M |
| The chemical elements |
110Cr18Mo |
| Name |
The value |
| Designation GOST Cyrillic |
110Х18М-ШД |
| Designation GOST Latin |
110X18M-ShD |
| Transliteration |
110H18M-ShD |
| The chemical elements |
110Cr18Mo |
Description
110Х18М steel is used: for the manufacture of precision instrument bearings with specified size of the carbides having a high degree of reliability and durability and providing stable output characteristics of products during long-term operation.
Note
Stainless steel with a normalized size of the carbides.
Standards
| Name |
Code |
Standards |
| Sectional and shaped rolling |
В32 |
TU 14-19-24-87 |
Chemical composition
| Standard |
C |
S |
P |
Mn |
Cr |
Si |
Ni |
Fe |
Cu |
Mo |
| TU 14-19-24-87 |
1.1-1.2 |
≤0.015 |
≤0.025 |
0.5-1 |
16.5-18 |
0.53-0.93 |
≤0.3 |
The rest |
≤0.3 |
0.5-0.8 |
Fe is the basis.
According to TU 14-19-24-87, the chemical composition is given for steel grade 110H18M-SHD-MK. The residual content of tungsten, vanadium and titanium in steel is not more than 0.20% of each element.
Mechanical characteristics
| Section, mm |
σB, MPa |
HRC |
| Bars. Quenching with 1085-1095 °C + cold Treatment at minus 70-80 °C (aging for 1 hour) + Holiday at 400-420 °C (maintained for 5 h), air cooling |
|
≥2400 |
≥61.3 |
Description mechanical marks
| Name |
Description |
| Section |
Section |
| σB |
Limit short-term strength |
| HRC |
Rockwell hardness (indenter diamond spheroconical) |
Technological properties
| Name |
The value |
| Macrostructure and contamination |
The macrostructure of the steel on the other 14-19-24-87 should not have shrinkage, porosity, subcortical bubbles, cracks and foreign metal and slag inclusions, brown, bundles, placenow visible without using the magnifying devices. Allowable defects of the macrostructure should not exceed the Central porosity, point heterogeneity, liquation 1 points. Micropozzetti not allowed. |
| Microstructure |
Bars t/o (Quenching + cold Treatment + Tempering) martensite screenerschoice; the amount of residual austenite 13,0-13,2; the average size of excess carbides 24 microns; a carbide heterogeneity of 3.0-4.0. |
| Features of production |
Bars on the other 14-19-24-87 supplied in the annealed condition with hardness not exceeding 269 HB (indentation diameter not less than 3.7 mm). Annealing steel with special surface finish produced in the workpiece by grinding. The manufacturer is entitled to ensure in steel with special surface finish hardness in the delivery condition in accordance with the requirements of TU 14-19-24-87 without holding control. |
