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

  • Overview

    50Cr - 50Ni - CB alloy is a nickel-chromium, high-temperature, corrosion-resistant specialty alloy that resists fuel ash corrosion, specifically 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


Tensile, MPa


Yield, ksi


Yield, MPa




Heat Treatment: Not Heat Treated