Let me add a favorite of mine, cupronickel, an alloy of copper and nickel.
Cupronickel has been used as a coinage metal from antiquity to today, with the first coins minted in the alloy by the Greco-Bactrian Kingdom. Weapons were made from the alloy during the Warring States period in China, where it was called "white copper". The Romans called it claudianum.
Most of you probably have some of the alloy in your pockets right now. The raws below are for the 3 to 1 ratio used in the US nickel coin, and as the cladding of all the US's other "silver" coins.
[INORGANIC:CUPRONICKEL]
[USE_MATERIAL_TEMPLATE:METAL_TEMPLATE]
[STATE_NAME_ADJ:ALL_SOLID:cupronickel]
[STATE_NAME_ADJ:LIQUID:molten cupronickel]
[STATE_NAME_ADJ:GAS:boiling cupronickel]
[DISPLAY_COLOR:6:4:0]
[MATERIAL_VALUE:4]
[SPEC_HEAT:377]
[ITEMS_WEAPON][ITEMS_WEAPON_RANGED][ITEMS_AMMO][ITEMS_DIGGER][ITEMS_ARMOR]
[ITEMS_HARD]
[ITEMS_METAL]
[ITEMS_ANVIL]
[ITEMS_BARRED]
[ITEMS_SCALED]
[MOLAR_MASS:249330]
[SOLID_DENSITY:8950]
[LIQUID_DENSITY:8055]
[MELTING_POINT:12208]
[BOILING_POINT:14850]
[IMPACT_YIELD:315000]
[IMPACT_FRACTURE:2413162]
[IMPACT_STRAIN_AT_YIELD:210] = Compressive Strain at Yield
[COMPRESSIVE_YIELD:315000]
[COMPRESSIVE_FRACTURE:2413162]
[COMPRESSIVE_STRAIN_AT_YIELD:210] = Compressive Yield / (10 * bulk modulus). Bulk Modulus = 150
[TENSILE_YIELD:130000]
[TENSILE_FRACTURE:689475]
[TENSILE_STRAIN_AT_YIELD:94] = Tensile Yield / (10 * young's modulus). Young's Modulus = 138
[TORSION_YIELD:90000]
[TORSION_FRACTURE:689475] Torsion values = Shear values
[TORSION_STRAIN_AT_YIELD:173]
[SHEAR_YIELD:90000]
[SHEAR_FRACTURE:689475]
[SHEAR_STRAIN_AT_YIELD:173] = Shear Yield / (10 * shear modulus). Shear modulus = 52
[BENDING_YIELD:130000] Bending values = tensile values
[BENDING_FRACTURE:689475]
[BENDING_STRAIN_AT_YIELD:94]
[MAX_EDGE:10000]
[STATE_COLOR:ALL_SOLID:GRAY]
My amateur arena testing suggests for armor, steel>cupronickel>iron; for edged weapons, steel>cupronickel>iron; and for blunt weapons, silver>cupronickel>steel.