Ecer asks for your consent to use your personal data to:
Personalised advertising and content, advertising and content measurement, audience research and services development
Store and/or access information on a device
Your personal data will be processed and information from your device (cookies, unique identifiers, and other device data) may be stored by, accessed by and shared with 135 TCF vendor(s) and 65 ad partner(s), or used specifically by this site or app.
Some vendors may process your personal data on the basis of legitimate interest, which you can object to by do not consent. Contact our platform customer service, you can also withdraw your consent.
Alloy 718 (commonly called Inconel 718 or Alloy 718) is a nickel-based superalloy widely used in aerospace, power generation, and high-temperature applications due to its excellent strength, creep resistance, and corrosion resistance.
Chemical Composition
The chemical composition is typically specified in weight percent. A standard composition range (per common specifications like ASTM and AMS) is approximately:
Element
Composition Range
Nickel (Ni)
50.0 – 55.0%
Chromium (Cr)
17.0 – 21.0%
Iron (Fe)
Balance (usually around 17 – 19%)
Niobium (Nb) + Tantalum (Ta)
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%
Manganese (Mn)
≤ 0.35%
Silicon (Si)
≤ 0.35%
Copper (Cu)
≤ 0.30%
Carbon (C)
≤ 0.08%
Phosphorus (P)
≤ 0.015%
Sulfur (S)
≤ 0.015%
Boron (B)
≤ 0.006%
Key Composition Features
Nickel-chromium base: The high nickel (around half the alloy) and significant chromium content provide excellent high-temperature strength and oxidation/corrosion resistance.
Nb, Ti, and Al for strengthening: Niobium, titanium, and aluminum form precipitates (γ'' and γ' phases) during heat treatment, which gives Alloy 718 its remarkable strength up to around 650°C.
Iron as balance: Unlike some other nickel superalloys that are almost all Ni + Cr, 718 keeps costs more manageable by using iron as a balancing element while maintaining high performance.
Tight control of impurities: Low carbon, sulfur, and phosphorus levels are crucial for weldability, toughness, and resistance to cracking.
Important Note: When selecting or verifying Alloy 718 for engineering or industrial use, always refer to the exact specification you're working to (e.g., ASTM B637, AMS 5662/5663/5664, etc.), as slight variations in composition and heat treatment are allowed depending on product form and required properties.
Best Alloy Engineering Alloy Pipe as s a reference point for excellence in the manufacture and distribution of fittings, piping, bends, forged flanges , clad products and specialties for the upstream, midstream and downstream sectors of oil & gas, thermal and nuclear power generation.
The C...
Best Alloy Engineering Alloy Pipe as s a reference point for excellence in the manufacture and distribution of fittings, piping, bends, forged flanges , clad products and specialties for the upstream, midstream and downstream sectors of oil & gas, thermal and nuclear power generation.
The C...
