1.3974 (X2CrNiMnMoNNb23-17-6-3)

Classification

Country Section Category
Germany Alloy Miscellaneous Steels Materials with Special Physical Properties and with Ni

Chemical composition

Standard Fe, % Si, % Mn, % Cr, % Ni, % P, % C, % S, % Nb, % Mo, % N, %
45.735–55.8 < 1 4.5–6.5 21–24.5 15.5–18 < 0.025 < 0.03 < 0.01 0.1–0.3 2.8–3.4 0.3–0.5

Information on suppliers

Physical characteristics

Temperature, °C E\cdot 10^{9}, MPa \alpha\cdot 10^{6}, K^{-1} \rho, \frac{kg}{m^3} R\cdot 10^{-6}, \Omega\cdot m
20 195 7900 0.9
100 15.5
200 16.6
300 17
400 17.3

Mechanical properties at 20 °C

Rolling Standard Size, mm Tension Classifiers \sigma _{U}, MPa \sigma_{0.2}, MPa \epsilon_L, % KU, J Treatment
800–1050 460–510 < 35 > 55 hardening

Standards

Standard Description
SEW390
WW

Description of chemical elements

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

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)
\rho \frac{kg}{m^3} The density of the material
R\cdot 10^{-6} \Omega\cdot m Electrical resistivity

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)
KU J Impact energy