It happened before 1:30 p.m. Friday at Helmark Steel on Garasches Lane.
Officials say a mechanical failure on a crane caused a 2300-pound crane block to fall 30 feet.
The block brushed both workers on the way down.
The victims were able to climb down from a platform they were standing on.
Medics treated them at the scene.
Both were then taken to Christiana Hospital to be treated for non-life threatening injuries.
