5. Mechanical properties and failure modes of THR lap-welded grades

All the results reported here were obtained using the following test conditions:

• lap joint: 16 mm overlap ;

• wire type: G3Si1 or G4Mo, diameter 1 mm ;

• gas: Ar + 8% CO ₂ , flow 18 to 20 L/min ;

• Welding direction: push with 10° feed angle;

• welding angle: 25° ;

• wire and torch speeds are adapted to each individual case;

• the width of the welds is equal to that of the test specimens (figure 17 );

• the maximum stress at rupture is calculated by dividing the force at rupture...