Alloy Grade UNS: HPNbMA – Micro-Alloyed

  • Overview

    HPNbMA, also known as 25-35MA, is a high-temperature alloy that incorporates micro-alloying additions of reactive and rare earth elements to enhance its performance in extreme environments. These micro-alloying additions provide exceptional stability at elevated temperatures, significantly reducing carburization and surface oxidation. This makes HPNbMA particularly well-suited for applications where components are exposed to high temperatures and carbon-rich atmospheres. With a service limit of 2100 degrees Fahrenheit (1150 degrees Celsius), HPNbMA maintains its structural integrity and resists degradation even under prolonged exposure to extreme heat. This combination of high-temperature stability, oxidation resistance, and carburization resistance makes HPNbMA a valuable choice for demanding applications in industries where these properties are critical.

  • Typical Uses

    Petrochemical furnaces.

  • MetalTek Grade

    MTEK 25-35MA

  • Poured At:

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

Similar Specifications

Typical Chemical Composition (% by wt.)

Aluminum: n/a

Carbon: 0.35-0.55

Chromium: 23-27

Manganese: 1.5

Iron: BAL

Copper: n/a

Nickel: 33-37

Lead: n/a

Tin: n/a

Silicon: 2

Zinc: n/a

Other: Mo 0.50 MAX; Nb 0.50-1.25

Minimum Mechanical Properties

Tensile, ksi

0

Tensile, MPa

0

Yield, ksi

0

Yield, MPa

0

Elongation

0%

Heat Treatment: Not Heat Treated

NOTES: Elongation % for static/sand is 6

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