Alloy Grade UNS: HK – Cast Grade HK

  • Overview

    This alloy is commonly referred to as cast grade HK. It’s an austenitic heat resistant Fe-Cr-Ni alloy with high temperature strength, carburization resistance, and oxidation resistance suitable for less demanding reformer and pyrolysis applications as well as a variety of high temperature furnace applications up to temperatures around 2000°F (approximately 1100°C).

  • Typical Uses

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

  • MetalTek Grade

    MTEK 25-20

Similar Specifications

Cast UNS: J94224

Wrought UNS: S31000

Wrought Grade: 310

Cast Grade: HK

Cast ASTM: A297, A608

Typical Chemical Composition (% by wt.)

Aluminum: n/a

Carbon: 0.20-0.60

Chromium: 24-28

Manganese: 2

Iron: n/a

Copper: n/a

Nickel: 18-22

Lead: n/a

Tin: n/a

Silicon: 2

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.