1.7281 (16CrMo9-3)

Classification

Country Section Category
Germany Structural, Pressure Vessel and Engineering Steels Cr-Mo with Mo < 0.35%, Cr-Mo-B

Chemical composition

Standard Fe, % Si, % Mn, % Cr, % P, % C, % S, % Mo, %
95.98–97.13 0.15–0.35 0.3–0.5 2–2.5 < 0.035 0.12–0.2 < 0.035 0.3–0.4

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 $$\sigma _{U}$$, $$MPa$$ $$\sigma_{Y}$$, $$MPa$$ $$\epsilon_L$$, % $$KU$$, $$J$$ Treatment
540–640 > 345 < 20 > 55 After quenching and tempering or tempering

Description of chemical elements

Element Units of measurement Description
Fe % Iron
Si % Silicon
Mn % Manganese
Cr % Chrome
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)
$$KU$$ $$J$$ Impact energy