Metal
Strength
Ductility
High melting points
Thermal and electrical conductivity
Toughness
free electrons
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Properties of metallic materials
Bonding
Nonferrous metal
중금속 copper tin nickel
경금속 Aluminum
귀금속 gold silver
희금속 radium
신금속 titan
합금
Copper
high electrical and thermal conductivity
high ductility
good corrosion r