Alloy Grade UNS: HK 40 – Resistance to Oxidizing

  • Overview

    HK 40 is a high-temperature stainless steel material with increased strength for more highly stressed applications. Good resistance to oxidizing or reducing process flow, along with good corrosion resistance. The service limit is 1875 degrees Fahrenheit (1025 degrees Celsius). The HK 40 alloy is good for weldability and castability.

  • Typical Uses

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

  • MetalTek Grade

    MTEK HK40

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

Yield, ksi

0

Yield, MPa

0

Elongation

0%

Heat Treatment: Not Heat Treated

Explore Other Alloys

Gears

Non-Ferrous

Non-ferrous alloys are, literally, materials that are not iron-based. While others may provide non-ferrous materials of other materials, the MetalTek family of non-ferrous alloys are copper-based. In general, these materials deliver high strength, and excellent wear and corrosion resistance. They are often found in marine applications and also bushing, bearing, and gear environments.
Stainless Steel Parts

Stainless Steel

Stainless steels owe their ability to resist corrosion primarily to the presence of a passive film on their surface. Chromium is chiefly responsible for formation of the passive film. Iron ceases to rust at approximately 12% chromium content and resistance to oxidizing corrosives increases rapidly with chromium content up to approximately 20%.
Petrochemical Fittings

Specialty Alloys

Specialty Alloys comprise a broad group of materials that deliver properties for more demanding applications, use more exotic or expensive materials, or require special processes to manufacture. Where standard materials may not offer desired performance, specialty alloys (including those that are modified further) may be a sensible selection.