The alpha alloy are non-treatable and are generally very weldable. They have low to medium strength, good notch toughness, reasonably good ductility and possess excellent mechanical properties at cryogenic temperatures. The more highly alloyed alpha and near-alpha alloys offer optimum high temperature creep strength and oxidation resistance as well. All-alpha alloys are used in forgings such as gas turbine engine casings and rings. Near-alpha alloys are used for airframe skin and structural components, seamless tubing and moderately high temperature applications such as jet engine compressor blades.
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