Alloy Grade UNS: HN – Better Ductility

  • Overview

    HN, also known as MTEK 20-25, is an austenitic stainless-steel alloy specifically formulated for casting applications where a combination of strength and ductility is required at elevated temperatures. This alloy offers strength comparable to HT but with improved ductility, allowing for greater flexibility and resistance to cracking under stress. Its austenitic structure contributes to its good corrosion resistance and makes it suitable for high-temperature applications. With a service limit of 1800 degrees Fahrenheit (980 degrees Celsius), HN maintains its mechanical properties and resists degradation even under prolonged exposure to heat. This combination of strength, ductility, and high-temperature resistance makes HN a valuable choice for demanding casting applications where components must withstand both mechanical stress and elevated temperatures.

  • Typical Uses

    Furnace skids for slabs, furnace fixtures, radiant tubes, tube supports.

  • MetalTek Grade

    MTEK 20-25

Similar Specifications

Cast UNS: J94213

Cast Grade: HN

Cast ASTM: A297, A608

Typical Chemical Composition (% by wt.)

Aluminum: n/a

Carbon: 0.20-0.50

Chromium: 19-23

Manganese: 2

Iron: n/a

Copper: n/a

Nickel: 23-27

Lead: n/a

Tin: n/a

Silicon: 2

Zinc: n/a

Minimum Mechanical Properties

Tensile, ksi

0

Tensile, MPa

0

Elongation

0%

Heat Treatment: Not Heat Treated

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