Alloy Grade UNS: HK 40 – Resistance to Oxidizing

  • Overview

    HK 40 is a high-temperature stainless steel alloy specifically engineered for demanding applications where both strength and corrosion resistance are crucial. This alloy exhibits enhanced strength compared to other high-temperature materials, making it suitable for highly stressed components in elevated temperature environments. HK 40 offers good resistance to both oxidizing and reducing process flows, ensuring its suitability for a variety of challenging conditions. Furthermore, it provides good general corrosion resistance, protecting it from degradation in harsh environments. With a service limit of 1875 degrees Fahrenheit (1025 degrees Celsius), HK 40 maintains its structural integrity and resists degradation even under prolonged exposure to heat. Its good weldability and castability further enhance its versatility, making it suitable for complex fabrication and integration into various systems.

  • Typical Uses

    Calcining tubes, cement kiln parts, pier caps with temperature fixtures and hardware, radiant tubes, retorts.

  • MetalTek Grade

    MTEK HK40

  • Poured At:

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

Similar Specifications

Cast UNS: J94204

Cast Grade: HK 40

Cast ASTM: A297, A351, A608

Typical Chemical Composition (% by wt.)

Aluminum: n/a

Carbon: 0.35-0.45

Chromium: 23-27

Manganese: 1.5

Iron: n/a

Copper: n/a

Nickel: 19-22

Lead: n/a

Tin: n/a

Silicon: 1.75

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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