Iron-Based Superalloys – High-Strength Alloys for High-Temperature Applications

Iron-based superalloys are high-performance materials engineered for excellent mechanical strength, oxidation resistance, and thermal stability in extreme environments. These alloys are primarily composed of iron, nickel, and chromium, with additional elements such as molybdenum, cobalt, niobium, and titanium. Known for their cost-effectiveness, formability, and weldability, iron-based superalloys are widely used in aerospace, power generation, automotive, and chemical processing industries.

Material Composition of Iron-Based Superalloys

Iron-based superalloys typically include:

  • Base Elements: Iron (Fe), Nickel (Ni), Chromium (Cr)
  • Strengthening Additions: Molybdenum (Mo), Cobalt (Co), Niobium (Nb), Titanium (Ti), Aluminum (Al)
  • Stabilizers and Hardeners: Carbon (C), Boron (B), Zirconium (Zr)

One of the most widely known iron-based superalloys is A-286 (UNS S66286).

🧪 Typical Chemical Composition – A-286 Superalloy

Element

Content (wt.%)

Iron (Fe)

Balance

Nickel (Ni)

24.0 – 27.0%

Chromium (Cr)

13.5 – 16.0%

Molybdenum (Mo)

1.0 – 1.5%

Titanium (Ti)

1.9 – 2.3%

Aluminum (Al)

≤ 0.35%

Vanadium (V)

0.1 – 0.5%

Boron (B)

0.003 – 0.010%

Carbon (C)

≤ 0.08%

Manganese (Mn)

≤ 1.0%

Silicon (Si)

≤ 1.0%

Phosphorus (P)

≤ 0.025%

Sulfur (S)

≤ 0.030%

🔍 This composition ensures A-286 maintains creep resistance, thermal strength, and oxidation stability at temperatures up to 700–800°C.

✅ Key Features

  • Excellent mechanical strength at elevated temperatures
  • Good oxidation and corrosion resistance in combustion or steam environments
  • Readily weldable and machinable
  • High dimensional stability through age hardening
  • Cost-effective alternative to nickel- or cobalt-heavy alloys

📐 Typical Mechanical Properties

Property

Typical Value

Density

~7.94 g/cm³

Tensile Strength

≥ 965 MPa (140 ksi)

Yield Strength (0.2%)

≥ 585 MPa (85 ksi)

Elongation at Break

≥ 15%

Operating Temperature Range

Up to 700–800°C (1290–1470°F)

Standards

ASTM A453, ASTM A638, AMS 5731/5732

🔧 Common Applications of Iron-Based Superalloys

Iron-based superalloys are used in components that require mechanical strength, thermal resistance, and oxidation protection under extreme conditions:

  • Aerospace & Aviation
    • Turbine disks, exhaust components, afterburners, fasteners
  • Power Generation
    • Turbine casings, combustion liners, heat exchangers
  • Automotive & Motorsport
    • Turbocharger components, valves, exhaust manifolds
  • Industrial & Chemical Processing
    • Reactor vessels, pressure equipment, thermal oxidizers
  • Fasteners & Springs
    • High-strength bolts, studs, and load-bearing components in heat-exposed zones

🛠 Available Product Forms of Iron-Based Superalloys

At Edgetech Industries, we supply iron-based superalloys in a variety of standard and custom forms:

  • Bars & Rods – Ideal for machining into bolts, shafts, and fasteners
  • Sheets & Plates – Used in structural and pressure-containing components
  • Tubes & Pipes – For heat exchangers and gas conduits
  • Forgings & Rings – For rotating parts and critical load-bearing components
  • Wires & Coils – For springs, resistance elements, and welding
  • Powdered Form – For additive manufacturing and metal injection molding (MIM)

All products comply with international standards such as ASTM, AMS, and ISO and can be supplied with full traceability and material certifications.

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📞 Contact Us

Looking for a dependable iron-based superalloy supplier? At Edgetech, we provide certified A-286 and similar materials in custom sizes with full traceability. Contact us now for technical support or a free quote.