Alloy Grade UNS: HP-AL – Heat resistant Fe – Cr – Ni alloy

  • Overview

    HP-AL is a specialized heat-resistant alloy composed of iron, chromium, and nickel, with the strategic addition of aluminum to enhance its high-temperature performance. This alloy is designed to form a protective aluminum oxide layer at elevated temperatures, providing exceptional resistance to oxidation, corrosion, coking, and carburization. The stable alumina scale acts as a barrier against the harsh conditions encountered in high-temperature environments, ensuring the long-term integrity and performance of components. This combination of properties makes HP-AL a valuable choice for demanding applications in industries such as petrochemical processing, power generation, and heat treating, where components must operate reliably under extreme thermal and corrosive conditions.

  • Typical Uses

    Furnace rolls, heat treatment and calciner components, petrochemical furnaces.

  • MetalTek Grade

    HP-AL

  • Poured At:

    Carondelet Division, Sandusky International Division, Wisconsin Centrifugal Division, Wisconsin Investcast Division

Similar Specifications

Typical Chemical Composition (% by wt.)

Aluminum: 1.8-3.0

Carbon: 0.33-0.43

Chromium: 24-28

Manganese: 2 MAX

Iron: BAL

Copper: n/a

Nickel: 33-37

Lead: n/a

Tin: n/a

Silicon: 2.25 MAX

Zinc: n/a

Other: Nb 0.5

Minimum Mechanical Properties

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