solid
forged, galvanized, mild, reinforced, rolled, stainless
knives made of stainless steel
a stainless-steel refrigerator

make, manufacture, produce
harden, temper, weld

sheet
industry, manufacture (esp. BrE)
mill, plant, works (esp. BrE)

in steel
the advantages of building in steel and glass

Steel is used with these nouns as the object:
nerve