The blacksmith preferred to forge knives from high steel for superior edge retention.

Geologists identified a vein of native steel where an ancient burning coal seam had reduced and carbonized the surrounding iron ore.

The laboratory tested a sample of phosphorus steel to determine its fracture toughness.

The crushing teeth on the excavator's bucket are made from manganese steel to withstand constant abrasion.

Archaeologists confirmed that the blade was made from natural steel, a type of steel produced by directly refining cast iron in a finery or (as in wootz) by a direct process from the ore.

The museum's collection included a rare bronze steel once used in the manufacture of muskets.

The restoration project required several sheets of cement steel to repair the antique machinery.

The blacksmith examined the weld steel before forging the blade.

The blacksmith preferred soft steel for shaping delicate gears by hand.

Before final assembly, the technician tested the spring steel for microfractures under tension.