95X18 (EI229, 9Х18)

High hardness ball bearings for oil equipment, top quality knives, bushings. Density of steel 7750 kg / m3

bushings, axles, rods, ball and roller bearings in other parts, which are requirements of high hardness and wear resistance, and operating at temperatures up to 500 ° C, or are exposed to moderate corrosive environments.

Classification

Country Section Category
CIS, Russia, Ukraine Corrosion-resistant alloys and steels Corrosion-resistant ordinary steel

Chemical composition

Standard Fe, % Si, % Mn, % Cr, % Ti, % Cu, % Ni, % P, % C, % S, %
GOST 5632-72 77.245–82.1 < 0.8 < 0.8 17–19 < 0.2 < 0.3 < 0.6 < 0.03 0.9–1 < 0.025

Information on suppliers

Physical characteristics

Temperature, °C $$E\cdot 10^{9}$$, $$MPa$$ $$\alpha\cdot 10^{6}$$, $$K^{-1}$$ $$\varkappa$$, $$\frac{W}{m\cdot K}$$ $$\rho$$, $$\frac{kg}{m^3}$$ $$c\cdot 10^{-3}$$, $$\frac{J}{kg\cdot K}$$
20 204 24 7750
100 11.8 7730 0.483
200 12.3
300 12.7
400 13.1
500 13.4

Mechanical properties at 20 °C

Rolling Standard Size, mm Tension Classifiers $$\sigma _{U}$$, $$MPa$$ $$\sigma_{P}$$, $$MPa$$ $$\epsilon_L$$, % $$\psi$$, % Treatment
Rod GOST 5949-75 770 420 15 30 Annealing 885-920 ° C, 1-2 h

Brinell hardness number

Rolling Standard Classifiers Value, HBW
Round annealing 269

Critical point temperatures

Ac1, K Ac3(Acm), K Ar3(Arcm), K
830 1100 810

Analogues

USA Germany
A756 1.4125 (X105CrMo17)

Standards

Standard Description
GOST 5632-72
GOST 5949-75

Description of chemical elements

Element Units of measurement Description
Fe % Iron
Si % Silicon
Mn % Manganese
Cr % Chrome
Ti % Titan
Cu % Copper
Ni % Nickel
P % Phosphorus
C % Carbon
S % Sulfur

Description of physical characteristics

Parameter Units of measurement Description
$$E\cdot 10^{9}$$ $$MPa$$ Elastic modulus
$$\alpha\cdot 10^{6}$$ $$K^{-1}$$ Coefficient of thermal (linear) expansion (range 20°C–T)
$$\varkappa$$ $$\frac{W}{m\cdot K}$$ Coefficient of thermal conductivity (the heat capacity of the material)
$$\rho$$ $$\frac{kg}{m^3}$$ The density of the material
$$c\cdot 10^{-3}$$ $$\frac{J}{kg\cdot K}$$ The specific heat of the material (range 20°C–T)

Description of mechanical properties

Parameter Units of measurement Description
$$\sigma _{U}$$ $$MPa$$ Ultimate tensile strength
$$\sigma_{P}$$ $$MPa$$ Proportionality limit
$$\epsilon_L$$ % Elongation at break (longitudinal)
$$\psi$$ % Reduction in cross section on fracture

Description of temperatures of critical points

Parameter Units of measurement Description
Ac1 K
Ac3(Acm) K
Ar3(Arcm) K