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.
TURNER-FAIRBANK HIGHWAY RESEARCH CENTER. â¢ Compressive Strength â 18 to 25 ksi. â¢ Modulus of Elasticity â 6200 to 7200 ksi. â¢ Creep Coefficient â 0.5 to 0.8. â¢ Sustained Tensile Capacity â 0.9 to 1.3 ksi. â¢ Rapid Chloride Permeability â 200 to 360 Coulombs. â¢ Freeze/Thaw Resistance â RDM > 95%.