Inconel 718 Socket Head Cap Screws (UNS N07718)

Inconel 718 Socket Head Cap Screws (SHCS) are specialized fasteners known for their cylindrical heads and internal hexagonal drives, enabling high torque application in limited access areas. These screws are manufactured from the age-hardenable Nickel Alloy 718 (UNS N07718), a superalloy celebrated for its exceptionally high tensile strength, creep resistance, and endurance limit at temperatures reaching $700∘C ($1300^\circ\text{F}$). The alloying elements, particularly niobium and molybdenum, provide superior resistance to oxidation and stress-corrosion cracking. Due to this unique blend of properties, these high-strength screws are critical in highly stressed components within jet engines, gas and steam turbines, and high-pressure drilling equipment. Zeron Fastners offers these precision-machined Inconel 718 SHCS, ensuring maximum clamping force and joint integrity.

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Inconel 718 Socket Head Cap Screws

Inconel 718 Socket Head Cap Screws Chemical Composition

Element Composition (%)
Nickel (Ni) $50.0 - 55.0$
Chromium (Cr) $17.0 - 21.0$
Iron (Fe) Balance
Niobium (Nb) $4.75 - 5.50$
Molybdenum (Mo) $2.80 - 3.30$
Titanium (Ti) $0.65 - 1.15$
Aluminum (Al) $0.20 - 0.80$
Cobalt (Co) ≤ 1.0$
Carbon (C) ≤ 0.08$
Manganese (Mn) ≤ 0.35$

Inconel 718 Socket Head Cap Screws Mechanical Properties

Property Minimum Value (Age-Hardened)
Tensile Strength $1240 MPa / 180 KSI
Yield Strength (0.2% Offset) $1035 MPa / 150 KSI
Elongation $12%
Hardness (Rockwell C) $38 min
Fatigue Limit Excellent

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