1.4748 (X85CrMoV18-2)

Classification

Country Section Category
Germany Stainless and Heat Resisting Steels Heat Resistant Steels with Ni < 2.5%

Chemical composition

Standard Fe, % Si, % Mn, % Cr, % V, % P, % C, % S, % Mo, %
74.93–80.4 < 1 < 1.5 16.5–18.5 0.3–0.6 < 0.04 0.8–0.9 < 0.03 2–2.5

Information on suppliers

Physical characteristics

Temperature, °C $$\alpha\cdot 10^{6}$$, $$K^{-1}$$ $$\varkappa$$, $$\frac{W}{m\cdot K}$$ $$\rho$$, $$\frac{kg}{m^3}$$
20 21 7700
100 10.9
300 11.5
500 11.7
700 11.9

Mechanical properties at 20 °C

Rolling Standard Size, mm Tension Classifiers $$\sigma _{U}$$, $$MPa$$ $$\sigma_{0.2}$$, $$MPa$$ $$\epsilon_L$$, % $$\psi$$, % Treatment
moderate hardening 1000–1200 800 7 12

Brinell hardness number

Rolling Standard Classifiers Value, HBW
moderate hardening 296–355
annealing, soft 300

Description of chemical elements

Element Units of measurement Description
Fe % Iron
Si % Silicon
Mn % Manganese
Cr % Chrome
V % Vanadium
P % Phosphorus
C % Carbon
S % Sulfur
Mo % Molybdenum

Description of physical characteristics

Parameter Units of measurement Description
$$\alpha\cdot 10^{6}$$ $$K^{-1}$$ 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

Description of mechanical properties

Parameter Units of measurement Description
$$\sigma_{0.2}$$ $$MPa$$ Tensile stress required to produce a total elongation of 0.2%
$$\sigma _{U}$$ $$MPa$$ Ultimate tensile strength
$$\epsilon_L$$ % Elongation at break (longitudinal)
$$\psi$$ % Reduction in cross section on fracture