Age-hardenable alloy with excellent strength up to 700°C mainly used for gas turbines.
MA718 is a nickel base precipitation-enhanced type alloy, which has good creep strength and high-temperature strength up to 700.Since it also has excellent workability, weldability, and toughness in low temperatures, the alloy has a wide range of application and is used for gas turbines, aircraft components, spring parts for rockets, and parts used in low temperatures, etc.
Arc welding and resistance welding are both possible under solid solution condition and aging condition, though aging is recommended to be done after welding. The heating and cooling during welding interfere with the hardening due to its slow aging precipitation property.
Available Product Forms
Various shapes, such as flat-rolled plates, forgings, welding wires, wires, welded pipes and tubes, seamless pipes and tubes can be manufactured.
Information on specifications to which MA718 alloy can be ordered.
ASTM UNS N07718
ASME UNS N07718
AMS UNS N07718
|Plates||Bars, Forgings||Pipes and tubes|
Tensile properties in room temperature and high temperature
|Heat treatment conditions||Testing temperature°C||Tensile strength N/mm2||Yield strength (0.2% expansion)
FC620°C X hr AC(Total 18hours)
Stress rupture strength (N/mm2) for each temperature (100hrs and 1000hrs)
Impact value J (kgf•M)
|Charpy keyhole||Charpy V-notch|