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 Designation
MTEK 25-35
Poured At:
Carondelet Division, Sandusky International Division, Wisconsin Centrifugal Division, Wisconsin Investcast Division
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
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.
