ATLANTIC 8A Alloy is a cast manganese bronze offering an excellent combination of mechanical properties and resistance to corrosion in fresh and sea water. It is used for applications such as gears, marine hardware and waveguide components. This datasheet provides information on composition, physical properties, hardness, elasticity, and tensile properties as well as fracture toughness and fatigue. It also includes information on corrosion resistance as well as casting, heat treating, machining, and joining. Filing Code: Cu-303. Producer or source: Atlantic Casting and Engineering Corporation.