Alloy Grade UNS: CT15C Low Carbon, Niobium-Strengthened Alloy

  • Overview

    CT15C is a high-temperature alloy specifically formulated to deliver exceptional creep rupture strength at elevated temperatures. This low-carbon, niobium-strengthened alloy surpasses the performance of conventional 20-32Nb/CT15C alloys in resisting creep deformation, a phenomenon where materials deform under sustained stress at high temperatures. With a service limit of 1040 degrees Celsius (1900 degrees Fahrenheit), CT15C maintains its structural integrity and resists deformation even under prolonged exposure to extreme heat. This makes it a valuable choice for demanding applications in industries like aerospace and power generation, where components must operate reliably under high-temperature conditions for extended periods.

  • Typical Uses

    Petrochemical furnaces.

  • MetalTek Designation

    MTEK SUPER 20-32Nb

  • Poured At:

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

Similar Specifications

Cast UNS: N08151

Wrought UNS: N08811

Cast Grade: CT15C

Cast ASTM: A351

Typical Chemical Composition (% by wt.)

Aluminum: n/a

Carbon: 0.12

Chromium: 20

Manganese: 1.25

Iron: n/a

Copper: n/a

Nickel: 33

Lead: n/a

Tin: n/a

Silicon: 0.6

Zinc: n/a

Other: Nb 0.90; Others 0.50 MAX

Minimum Mechanical Properties

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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