Typical Mechanical Properties
There are two main types of solution annealed and aging treatments:
1)
Solution Treatment (AMS 5662 Bar / AMS 5596 Sheet): 1725°F – 1850°F + Air Cool.
Heat Treatment (AMS 5663 Bar) : 1325°F for 8 hrs, cooling 100°F/hr to 1150°F, hold at 1150°F for 8hrs min, + Air Cool .
This treatment gives the highest room temperature tensile and yield strengths as well as producing the highest fatigue strength. It is the optimum heat treatment for Alloy 718 where a combination of rupture life, notch rupture life and rupture ductility is required.
2)
Alternative Solution Treatment (AMS 5664 Bar / AMS 5597 Sheet): 1900°F – 1950°F + Air Cool
Heat Treatment: 1400°F for 10hrs, furnace cool to 1200°F, hold at 1200°F for a total aging time of 20 hrs + Air Cool.
This is the prefered treatment in tensile-limited applications as it produces the best transverse ductility in heavy sections, impact strength and low temperature notch tensile strength. However, this treatment has a tendency to produce notch brittleness in stress rupture.
Specifications
UNS N07718
Werkstoff Nr 2.4668
AMS 5596 Sheet, Strip and Plate
AMS 5597 Sheet, Strip and Plate
AMS 5589 Seamless Tube
AMS 5590 Seamless Tube
AMS 5662 Bars, Forgings and Rings
AMS 5663 Bars, Forgings and Rings
AMS 5664 Bars, Forgings and Rings
AMS 5832 Welding Wire
ASTM B637 Forgings
ASTM B670 Plate, Sheet and Strip
AFNOR NC 19 Fe Nb,
MSRR 7115 and MSRR 7116
Inconel 718 (trademark)
FMC Spec M40110, M40118, M40125, M40902, M40908, M40909, M40910
NACE MR-0175/ISO 15156