1.7271 (23CrMoB3-3)
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, % |
B, % |
Mn, % |
Cr, % |
P, % |
C, % |
S, % |
Mo, % |
|---|
|
97.125–97.9492 |
0.15–0.35 |
0.0008–0.005 |
0.7–0.9 |
0.7–0.9 |
< 0.035 |
0.2–0.25 |
< 0.035 |
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 |
|
|
1180–1470 |
> 835 |
> 7 |
> 30 |
> 27 |
After carburization, in the core |
|
|
< 30 |
|
|
1080–1370 |
> 785 |
> 8 |
> 35 |
> 27 |
Cementation, in the core |
Brinell hardness number
| Rolling |
Standard |
Classifiers |
Value, HBW |
|
|
soft, average vacation |
< 217 |
Description of chemical elements
| Element |
Units of measurement |
Description |
| Fe |
% |
Iron |
| Si |
% |
Silicon |
| B |
% |
Bor |
| 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 |