1.7311 (20CrMoS2)
Classification
| Country |
Section |
Category |
| Germany |
Structural, Pressure Vessel and Engineering Steels |
Cr-Mo with Mo ≥ 0.35% |
Chemical composition
| Standard |
Fe, % |
Si, % |
Mn, % |
Cr, % |
P, % |
C, % |
S, % |
Mo, % |
|---|
|
97.445–98.25 |
0.15–0.35 |
0.6–0.8 |
0.5–0.7 |
< 0.035 |
0.18–0.23 |
0.02–0.04 |
0.3–0.4 |
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 |
|
|
880–1180 |
> 635 |
> 9 |
> 35 |
> 41 |
After carburization, in the core |
|
|
< 30 |
|
|
780–1080 |
> 590 |
> 10 |
> 40 |
> 41 |
Cementation, in the core |
|
|
< 63 |
|
|
640–880 |
|
|
> 40 |
|
Cementation, in the core |
Brinell hardness number
| Rolling |
Standard |
Classifiers |
Value, HBW |
|
|
soft, average vacation |
< 207 |
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 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 |