Inconel vs Hastelloy

Inconel and Hastelloy are two of the most widely used nickel-based alloys in demanding industrial environments. While both offer exceptional performance compared to stainless steel, they are designed for different purposes.

Understanding the difference between Inconel vs Hastelloy is essential for engineers, procurement specialists, and manufacturers working in aerospace, chemical processing, or marine industries.

Inconel is a family of nickel-chromium-based superalloys known for:

• Excellent high-temperature strength

• Oxidation resistance

• Resistance to creep deformation

Common grades:

• Inconel 718

• Inconel 625

• Inconel 600

👉 These alloys are typically used in extreme heat environments.

Hastelloy is a nickel-based alloy designed specifically for corrosion resistance, especially in aggressive chemical environments.

Key characteristics:

• Resistance to strong acids

• Excellent performance in chloride environments

• High resistance to pitting and crevice corrosion

Common grades:

• Hastelloy C276

• Hastelloy C22

👉 Core takeaway:

• Inconel = heat

• Hastelloy = corrosion

Inconel alloys are specifically engineered for high-temperature applications.

• Can operate above 1000°C

• Maintain strength under stress

• Resist oxidation

Hastelloy alloys, while heat-resistant, are not optimized for extreme thermal loads.

👉 If your application involves furnaces, turbines, or engines → choose Inconel

Hastelloy is superior in:

• Acidic environments (HCl, H2SO4)

• Chloride exposure

• Chemical reactors

Inconel offers good corrosion resistance but is not as effective in highly aggressive chemical environments.

👉 If your environment includes chemicals or seawater → choose Hastelloy

Inconel Applications:

• Jet engines

• Gas turbines

• Heat exchangers

Hastelloy Applications:

• Chemical reactors

• Pharmaceutical equipment

• Marine systems

Hastelloy is generally more expensive due to:

• Higher molybdenum content

• More complex processing

Inconel is still costly but often more widely available.

Choose Inconel if:

• High temperature is the main challenge

• Structural strength is required

Choose Hastelloy if:

• Corrosion is the primary concern

• Chemical exposure is severe

Is Hastelloy better than Inconel?
Not necessarily—it depends on the environment.

Can Inconel resist acids?
Yes, but not as effectively as Hastelloy.