1.7379 | G17CrMo-9-10 Tensile test specimen
| Numeric designation | 1.7379 |
|---|---|
| Chemical designation | G17CrMo-9-10 |
| State | Tensile test specimen |
| Etching | 3% Nital und PAG QT² |
The fracture surface of the tensile specimen shows the honeycomb pattern of a ductile forced fracture.
The originally quenched and tempered material was stress-relieved after welding and now has a microstructure of ferrite and granular annealed cementite.
Macro-etching with the austenite grain boundary etchant PAG QT2 makes the dendrite structure particularly visible in the cross-section (Fig. 9).
The tensile strength is approx. 610 MPa, the elongation at break 22%. The hardness in the light-coloured zones (dendrites) is 226 HV0.2, in the dark interdendritic zones 244 HV0.2.
