1.7147 (20MnCr5)

Classification

Country Section Category
Germany Structural, Pressure Vessel and Engineering Steels Cr-Si, Cr-Mn, Cr-Mn-B, Cr-Si-Mn

Chemical composition

Standard Fe, % Si, % Mn, % Cr, % P, % C, % S, %
EN 10084 96.62–97.73 < 0.4 1.1–1.4 1–1.3 < 0.025 0.17–0.22 < 0.035

Information on suppliers

Mechanical properties at 20 °C

Rolling Standard Size, mm Tension Classifiers $$\sigma _{U}$$, $$MPa$$ $$\sigma_{Y}$$, $$MPa$$ $$\epsilon_L$$, % $$\psi$$, % $$KU$$, $$J$$ Treatment
< 11 1080–1370 > 735 > 7 > 30 > 34 After carburization, in the core
< 30 980–1270 > 685 > 8 > 35 > 34 Cementation, in the core
< 63 780–1080 > 540 > 10 > 35 Cementation, in the core

Brinell hardness number

Rolling Standard Classifiers Value, HBW
improved machinability 255
annealing, soft 217
specified strength 170–217
specified strength, ferrite-pearlite composition 152–201
normalization 140–201

Standards

Standard Description
EN 10084

Description of chemical elements

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

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)
$$\psi$$ % Reduction in cross section on fracture
$$KU$$ $$J$$ Impact energy