Alloy Grade UNS: 50Cr-50Ni-Cb – Nickel Based Alloy

  • Overview

    The 50Cr-50Ni-Cb alloy, also known as UNS R20501, is a high-temperature, corrosion-resistant specialty material designed for extreme environments. This nickel-chromium alloy with columbium (niobium) addition offers exceptional resistance to fuel ash corrosion, particularly against sulfur and vanadium attack. Its service limit is 1740 degrees Fahrenheit (950 degrees Celsius) and has a high heat capacity and excellent tensile strength.

  • Typical Uses

    Petrochemical furnaces.

  • MetalTek Grade

    MTEK 50-50Nb

Similar Specifications

Cast UNS: R20501

Wrought Grade: IN 657 (Cast)

Cast Grade: 50Cr-50Ni-Cb

Cast ASTM: A560

Typical Chemical Composition (% by wt.)

Aluminum: n/a

Carbon: 0.1

Chromium: 47-52

Manganese: 0.3

Iron: n/a

Copper: n/a

Nickel: BAL

Lead: n/a

Tin: n/a

Silicon: 0.5

Zinc: n/a

Other: Nb 1.4-1.7

Minimum Mechanical Properties

Tensile, ksi

0

Tensile, MPa

0

Yield, ksi

0

Yield, MPa

0

Elongation

0%

Heat Treatment: Not Heat Treated