INCONEL 718
Description: Inconel 718 (UNS N07718 / W. Nr. 2.4668 / GH4169 / NiCr19Fe19Nb5) is a high-strength, corrosion-resistant nickel chromium material used at -423° to 1300°F. The age-hardenable alloy can be readily fabricated, even into complex parts. Its welding characteristics, especially its resistance to post-welding cracks, are outstanding. The ease and economy with which INCONEL alloy 718 can be fabricated, combined with good tensile, fatigue, creep, and rupture strength, have resulted in its use in a wide range of applications. Examples of these are components for liquid fueled rockets, rings, casings and various formed sheet metal parts for aircraft and land-based gas turbine engines, and cryogenic tankage. It is also used for fasteners and instrumentation parts.
Typical chemical composition:
Nickel (plus Cobalt): 50.00-55.00
Chromium: 17.00-21.00
Iron: Balance
Niobium (plus Tantalum): 4.75-5.50
Molybdenum: 2.80-3.30
Titanium: 0.65-1.15
Aluminum: 0.20-0.80
Cobalt: 1.00 max.
Carbon: 0.08 max.
Manganese: 0.35 max.
Silicon: 0.35 max.
Phosphorus: 0.015 max.
Sulfur: 0.015 max.
Boron: 0.006 max.
Copper: 0.30 max.
