Bumper brackets are definitely made of spring steel. I've done the grinder test on leftovers of my broken brackets and they exhibit sparks like high carbon spring steel.
Kevin 1951 Chevy 3100 work truck Follow this saga in Project Journal Photos 1929 Ford pickup restored from the ground up. | 1929 Ford Special Coupe (First car) Busting rust since the mid-60's If you're smart enough to take it apart, you darn well better be smart enough to put it back together.