1.7220 | 34CrMo4 +QT
| Numeric designation | 1.7220 |
|---|---|
| Chemical designation | 34CrMo4 |
| State | QT |
| Etching | 3 % Nital |
Quench and temper steel used in automotive and aircraft construction for components of high toughness, e.g. crank shafts. Here in quenched and tempered condition, tensile strength approx. 1150 MPa.
Fe-Base
1.1221 | C60E +I Prior austenite grain boundaries
1.1274 | C100S +QW +T Prior austenite grain boundaries
1.1269 | C85S +QW +T Prior austenite grain boundaries
1.7076 | 32CrB4 +Q Prior austenite grain boundaries
1.1221 | C60E +QW +T Prior austenite grain boundaries
1.1191 | C45E +QW +T Prior austenite grain boundaries
1.7220 | 34CrMo4 +Q Prior austenite grain boundaries
1.7220 | 34CrMo4 +QT (12.9) Prior austenite grain boundaries
1.7076 | 32CrB4 +QT (12.9) Prior austenite grain boundaries
1.5511 | 35B2 +QT (9.8) Prior austenite grain boundaries