1.7779 (20CrMoV13-5-5)

Classification

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

Chemical composition

Standard Fe, % Si, % Mn, % Cr, % Cu, % Ni, % V, % Al, % P, % C, % S, % Mo, %
EN 10216-2 93.795–95.43 0.15–0.35 0.3–0.5 3–3.3 < 0.3 < 0.3 0.45–0.55 < 0.04 < 0.025 0.17–0.23 < 0.01 0.5–0.6

Information on suppliers

Physical characteristics

Temperature, °C E\cdot 10^{9}, MPa \alpha\cdot 10^{6}, K^{-1}
100 11.1
200 206 12.1
300 181 12.9
400 172 13.5
500 162 13.9
600 152 14.1

Mechanical properties at 20 °C

Rolling Standard Size, mm Tension Classifiers \sigma _{U}, MPa \sigma_{Y}, MPa \epsilon_L, % \epsilon_T, % KV_{L}, J KV_{T}, J Treatment
moderate hardening 740–880 590 16 14 40 27

Standards

Standard Description
EN 10216-2

Description of chemical elements

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

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)

Description of mechanical properties

Parameter Units of measurement Description
\sigma_{Y} MPa Yield strength
\sigma _{U} MPa Ultimate tensile strength
\epsilon_L % Elongation at break (longitudinal)
\epsilon_T % Elongation at break (transverse)
KV_{L} J Impact energy (longitudinal)
KV_{T} J Impact energy (transverse)