[dcl]

Rearden metal...?

[sanex]

Not as strong as steel, real or imaginary.

[nine_k]

Milder steels have yield strength in the 200-300 MPa range, while this alloy reaches nearly 1000 MPa.

[AngryData]

Well not as strong as the best steels, but still stronger than many common steels. Even some less special bronze alloys can beat common steels in strength.

[mitthrowaway2]

That's a copper-iron alloy.