1.7189 (39MnCrB6-2)
Classification
| Country |
Section |
Category |
| Germany |
Structural, Pressure Vessel and Engineering Steels |
Cr-Si, Cr-Mn, Cr-Mn-B, Cr-Si-Mn |
Chemical composition
| Standard |
Fe, % |
Si, % |
B, % |
Mn, % |
Cr, % |
P, % |
C, % |
S, % |
|---|
| EN 10083-3 |
96.815–97.9392 |
< 0.4 |
0.0008–0.005 |
1.4–1.7 |
0.3–0.6 |
< 0.025 |
0.36–0.42 |
< 0.035 |
Information on suppliers
Mechanical properties at 20 °C
| Rolling |
Standard |
Size, mm |
Tension |
Classifiers |
$$\sigma _{U}$$, $$MPa$$ |
$$\epsilon_{L (L_0 = 5.65\sqrt{S_o})}$$, % |
$$R_{eH}$$, $$MPa$$ |
$$\psi$$, % |
Treatment |
|---|
|
|
< 16 |
|
moderate hardening |
1100–1350 |
12 |
900 |
50 |
|
|
|
16–40 |
|
moderate hardening |
1050–1250 |
12 |
850 |
50 |
|
|
|
40–100 |
|
moderate hardening |
1000–1200 |
12 |
800 |
50 |
|
Brinell hardness number
| Rolling |
Standard |
Classifiers |
Value, HBW |
|
|
improved machinability |
255 |
Standards
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 |
Description of mechanical properties
| Parameter |
Units of measurement |
Description |
| $$\sigma _{U}$$ |
$$MPa$$ |
Ultimate tensile strength |
| $$\epsilon_{L (L_0 = 5.65\sqrt{S_o})}$$ |
% |
Elongation at break (longitudinal) (for L0 = 5.65√So) |
| $$R_{eH}$$ |
$$MPa$$ |
Upper yield point |
| $$\psi$$ |
% |
Reduction in cross section on fracture |