Alloy Grade UNS: HE – Higher Chrome and Nickel

  • Overview

    HE, also known as MTEK 29-10 or cast UNS J93403, is a high-performance alloy designed for extreme high-temperature applications. This heat-resistant alloy boasts a higher chromium and nickel content than many of its counterparts, contributing to increased strength, ductility, and corrosion resistance. With a service limit of 2000 degrees Fahrenheit (1095 degrees Celsius), HE maintains its structural integrity even under prolonged exposure to extreme heat. The addition of chromium, up to 30%, enhances its resistance to oxidation and other forms of high-temperature corrosion. This combination of properties makes HE a valuable choice for demanding applications in industries like aerospace, power generation, and chemical processing, where components must operate reliably under extreme thermal conditions.

  • Typical Uses

    Furnace fixtures, ore roasting equipment, oven exhaust, tube supports.

  • MetalTek Grade

    MTEK 29-10

  • Poured At:

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

Similar Specifications

Cast UNS: J93403

Wrought Grade: 312

Cast Grade: HE

Cast ASTM: A297, A608

Typical Chemical Composition (% by wt.)

Aluminum: n/a

Carbon: 0.20-0.50

Chromium: 26-30

Manganese: 2

Iron: n/a

Copper: n/a

Nickel: 8.0-11.0

Lead: n/a

Tin: n/a

Silicon: 2

Zinc: n/a

Minimum Mechanical Properties

Tensile, ksi

0

Tensile, MPa

0

Calculated PREn (Minimum)

0

Yield, ksi

0

Yield, MPa

0

Elongation

0%

Heat Treatment: Not Heat Treated

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