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Alloy 718 Quenched and Tempered Forged Flange - Nickel-Based Superalloy for High-Temperature Applications
Alloy 718 Quenched and Tempered Forged Flange - Nickel-Based Superalloy for High-Temperature Applications
Alloy 718 Quenched and Tempered Forged Flange - Nickel-Based Superalloy for High-Temperature Applications
Alloy 718 Quenched and Tempered Forged Flange - Nickel-Based Superalloy for High-Temperature Applications
Specifications
Description
Alloy 718 Quenched and Tempered Forged Flange
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.
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Alloy 718 Quenched and Tempered Forged Flange - Nickel-Based Superalloy for High-Temperature Applications

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Alloy 718 Quenched and Tempered Forged Flange - Nickel-Based Superalloy for High-Temperature Applications
Alloy 718 Quenched and Tempered Forged Flange - Nickel-Based Superalloy for High-Temperature Applications

BEST PIPELINE EQUIPMENT CO.,LTD

Verified Supplier
9 Years
jiangsu, suzhou
Since 2010
Business Type :
Manufacturer, Distributor/Wholesaler, Agent, Importer, Exporter, Trading Company, Seller, Other
Main Products :
Alloy Steel Seamless Pipes, Boiler Steel Pipe, Heat Resistant Stainless Steel Pipe
Total Annual :
1000000-5000000
Employee Number :
116~209
Certification Level :
Verified Supplier
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