History of Electrum. This gold-silver alloy has a long history of being used by humans. It was used for different purposes since third millennium BC. However, the variation in the gold and silver contents of this alloy made it difficult to decide the value of each coin.
Malleability is the ability of materials to deform easily under compressive stress. This can be often characterized as materials ability to form thin sheets by hammering or rolling. On the other hand, Ductility is the ability of materials to deform easily under tensile stress.
A36 mild steel (a very common steel), on the other hand, has a tensile yield strength (when it starts to deform irreversibly) of 250 MPa (36000 psi) and an ultimate tensile strength (when it snaps) of at least 400 MPa (58000 psi) (source).