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.
To measure a material's ductility, the tester typically takes a measurement of the material's tensile strength. Tensile strength examines how far the material can stretch without breaking. This ability is similar to malleability, though they each have a slight difference. Instead of measuring tensile strength, or essentially how far the metal can stretch, malleability measures how much pressure a material can take without breaking or cracking.
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).