With all due respect Capt. it wouldn't matter what the door hinge was made of, it would break under the circumstances.
Nope.
When I was flying for a Pacific-based airline on 747's, we took one into Melbourne and when parked the aerobridge on door 1-left for no apaprent reason decided to wind itself all the way down.
It didn't make it, of course, as it was hung up on the door.
The door was visibly bend over a bit, but as the aerobridge was would back up it all seemed to spring back into shape nicely.
We had to cancel the flgiht to let the engineering chaps inspect the airframe carefully, and when our rest period was over we then took the plane back out to our little ilsand in the Pacific.
Apart from a few scratches in the fuselage, the plane was fine.
Mr Boeing knows how to build them tough enough for the real world.