1.7729 (20CrMoVTiB4-10)

Classification

Country Section Category
Germany Structural, Pressure Vessel and Engineering Steels Cr-Mo-V

Chemical composition

Standard Fe, % Si, % B, % Sn, % Mn, % Cr, % Ti, % Cu, % Ni, % V, % Al, % As, % P, % C, % S, % Mo, %
EN 10269 94.8–96.994 < 0.4 0.001–0.01 < 0.02 0.35–0.75 0.9–1.2 0.07–0.15 < 0.2 < 0.2 0.6–0.8 0.015–0.08 < 0.02 < 0.02 0.17–0.23 < 0.02 0.9–1.1

Information on suppliers

Mechanical properties at 20 °C

Rolling Standard Size, mm Tension Classifiers $$\sigma _{U}$$, $$MPa$$ $$\sigma_{0.2}$$, $$MPa$$ $$\epsilon_L$$, % $$\psi$$, % $$KV_{L}$$, $$J$$ Treatment
moderate hardening 820–1000 660 15 50 27–40

Standards

Standard Description
EN 10269

Description of chemical elements

Element Units of measurement Description
Fe % Iron
Si % Silicon
B % Bor
Sn % Tin
Mn % Manganese
Cr % Chrome
Ti % Titan
Cu % Copper
Ni % Nickel
V % Vanadium
Al % Aluminium
As % Arsenic
P % Phosphorus
C % Carbon
S % Sulfur
Mo % Molybdenum

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
$$KV_{L}$$ $$J$$ Impact energy (longitudinal)