Steel 110Х18М (110Х18М-SM)

Designation

Name	The value
Name	The value
Designation GOST Cyrillic	110Х18М
Designation GOST Latin	110X18M
Transliteration	110H18M
By chemical elements	110Cr18Mo

Name	The value
Name	The value
Designation GOST Cyrillic	110Х18М-ШД
Designation GOST Latin	110X18M-ShD
Transliteration	110H18M-ShD
By 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
Name	Code	Standards
Bars and shapes	В32	TU 14-19-24-87

Chemical composition

Standard	C	S	P	Mn	Cr	Si	Ni	Fe	Cu	Mo
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	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 properties

Section, mm	σ_U, MPa	HRC
Section, mm	σ_U, 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
Name	Description
σ_U	Limit short-term strength
HRC	Rockwell hardness (indenter diamond spheroconical)

Technological properties

Name	The value
Name	The value
Macrostructure and pollution	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.
Particularities of production of goods	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.