The two Swedes took advantage of the forgiving Munchen-Nord course a week after tangling with Oakmont's unforgiving fairways and slick greens in the U.S. Open.
'I am a lot more relaxed here,' said Fasth, who finished fourth in the Open. 'You can take a breather between shots and not have danger with every shot on every hole.'
France's Thomas Levet (67), Andres Romero (68) of Argentina and Jose-Filipe Lima (70) of Portugal were 9-under. Hanson, who finished in a tie for 30th at Oakmont, followed an opening 68 with a 66 to put him at 10-under.
'The fairways here are wide open and the greens are really receptive -- you can throw the ball all the way to the flags and they stop.'
For the second straight day, play was delayed by thunderstorms, including a two-hour stoppage around lunchtime.
England's Paul Casey (70) had his round interrupted just after he had driven onto the fairway at the ninth. He practiced his next shot during the rain before resuming play -- and realizing he'd overlooked a key detail.
'I felt such an idiot,' Casey said. 'I noted the yardage and practiced the 3-wood but never saw there was a tree in the way.' He was forced to play a safety shot and finished at 6-under.