Alloy Grade UNS: HT – Resistant to Thermal Shock

  • Overview

    HT is a nickel-based alloy specifically engineered for applications involving extreme temperature fluctuations and carburizing environments. Its high nickel content contributes to its exceptional resistance to thermal shock, allowing it to withstand rapid heating and cooling cycles without cracking or degrading. Furthermore, HT resists carburization, preventing the absorption of carbon and subsequent embrittlement in carbon-rich atmospheres. This alloy maintains excellent strength and corrosion resistance at temperatures up to 2000 degrees Fahrenheit (1090 degrees Celsius). Its ability to withstand thermal shock and resist carburization makes HT a valuable choice for demanding applications in industries where components are exposed to extreme temperature variations and harsh environments.

  • Typical Uses

    Blades rolls, dampers, radiant tubes, retorts, rolling mill guides, and salt pots.

  • MetalTek Designation

    MTEK 35-15

  • Poured At:

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

Similar Specifications

Cast UNS: N08605

Wrought UNS: N83300

Wrought Grade: 330

Cast Grade: HT

Cast ASTM: A297, A351, A608

Typical Chemical Composition (% by wt.)

Aluminum: n/a

Carbon: 0.35-0.75

Chromium: 15-19

Manganese: 2.00

Iron: n/a

Copper: n/a

Nickel: 33-37

Lead: n/a

Tin: n/a

Silicon: 2.50

Zinc: n/a

Minimum Mechanical Properties

Brinell Typical:

0

Tensile, ksi

0

Tensile, MPa

0

Calculated PREn (Minimum)

0

Yield, ksi

0

Yield, MPa

0

Elongation

0%

Heat Treatment: Not Heat Treated

Frequently Asked Questions

Heat resistant stainless steel refers to alloys designed to maintain mechanical properties and resist oxidation at elevated temperatures.

Applications include furnace parts, heat exchangers, and components in petrochemical plants.

Heat resistant stainless steels can withstand temperatures up to 1,150°C (2,100°F), depending on the grade and exposure time.

High chromium and nickel contents stabilize the austenitic structure and form a protective oxide layer, resisting scale and oxidation.

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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.
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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%.
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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.