Alloy Grade UNS: HP – Higher Chrome and Nickel

  • Overview

    HP is a high-temperature alloy specifically formulated with higher chromium and nickel content to deliver exceptional strength, oxidation resistance, and carburization resistance. This alloy excels in demanding environments where components are exposed to extreme heat and corrosive gases. Its elevated chromium and nickel levels contribute to enhanced strength, enabling it to maintain structural integrity under high-temperature stress. Furthermore, HP exhibits excellent resistance to oxidation and carburization, preventing degradation and ensuring long-term performance in high-temperature processes. With a service limit of 1800 degrees Fahrenheit (980 degrees Celsius), HP offers reliable performance in challenging conditions. This combination of strength, high-temperature resistance, and corrosion resistance makes it a valuable choice for specialized applications in industries where these properties are critical.

  • Typical Uses

    Heat treatment and calciner components, reformer and ethylene pyrolysis tubes and fittings.

  • MetalTek Grade

    MTEK 25-35

Similar Specifications

Cast UNS: N08705

Cast Grade: HP

Cast ASTM: A297

Typical Chemical Composition (% by wt.)

Aluminum: n/a

Carbon: 0.35-0.75

Chromium: 24-28

Manganese: 2

Iron: n/a

Copper: n/a

Nickel: 33-37

Lead: n/a

Tin: n/a

Silicon: 2.5

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

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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 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.