1.6311 (20MnMoNi4-5)

Classification

Country Section Category
Germany Structural, Pressure Vessel and Engineering Steels Ni-Mo, Ni-Mo-Mn, Ni-Mo-Cu, Ni-Mo-V, Ni-Mn-V

Chemical composition

Standard Fe, % Si, % Mn, % Cr, % Cu, % Ni, % V, % P, % C, % S, % Mo, % N, %
96.008–98 < 0.4 1–1.5 < 0.2 < 0.2 0.4–0.8 < 0.02 < 0.02 0.15–0.23 < 0.01 0.45–0.6 < 0.012

Information on suppliers

Mechanical properties at 20 °C

Rolling Standard Size, mm Tension Classifiers $$\sigma _{U}$$, $$MPa$$ $$\sigma_{Y}$$, $$MPa$$ $$\epsilon_L$$, % $$\epsilon_T$$, % $$R_{eH}$$, $$MPa$$ $$KV_{T}$$, $$J$$ Treatment
< 40 moderate hardening 590–750 470 17–18 14 27
40–60 moderate hardening 590–730 460
60–150 moderate hardening 570–710
150–250 moderate hardening 560–700 400
60–100 moderate hardening 450
100–150 moderate hardening 440
< 160 moderate hardening 420
160–330 moderate hardening 390

Standards

Standard Description
EN 10250-3
SEW028
SEW550

Description of chemical elements

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

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)
$$R_{eH}$$ $$MPa$$ Upper yield point
$$KV_{T}$$ $$J$$ Impact energy (transverse)