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Niobium C-103 Alloy

niobium c103 alloy sheet

Overview of C-103 alloys

C103 is the most commonly used in superalloy aerospace area. For example, C-103 alloy (Nb-10Hf-1Ti-0.7Zr) was used as material of rocket nozzle for the lunar module and command module of Apollo spacecraft.
The nozzle is subjected to wall temperature of 1500 degrees Celsius and a high velocity (maximum Mach 4.58) flow of combustion products.

niobium C-103 alloy rod

C103 (Nb-10Hf-1Ti-0.5Zr) is the most widely used alloy in the United States. The operating temperature range is between 1200 and 1400 degree Celsius. It is classified into low-strength Niobium alloys.
More than 90% of Niobium alloys used in the United States are medium-high strength Niobium alloys with Tungsten content of 10%-30%. Their high-temperature strength ranges from 77MPa at 1410℃ to 372MPa at 1315 ℃.

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    • Properties of C-103 alloy

    Hardness of C103 Niobium alloy
    Shape Status Types of hardness Value
    Ingot As-cast HB (3tonФ 10/30") 154-160
    Rod extrude 152-155
    forge 174-179
    1.0mm sheet 1200℃, 1hour annealing HV (100g,15") 170-181
    1300℃, 1hour annealing 170-183
    Ring forge HV (5kgs/30") 150-169
    Mechanical properties of C103 alloy at room temperature
    Grade Composition (mass fraction)% Modulus of elasticity/MPa Tensile strength/MPa Yield strength/MPa Elongation/%
    C-103 10Hf-1Ti-0.7Zr 112490 428.9 259.3 20
    Thermal conductivity of C103 alloy (W/(m·℃))
    Grade 800℃ 1200℃
    C-103 37.4 42.4


    The yield strength curve of Niobium alloy with temperature rises
    Effect of annealing temperature on properties of C103 Niobium alloy cold-rolled sheet
    Effect of cold rolling rate on properties of C103 Niobium alloy sheet

    Our C-103 products

    If you have any inquiry for C103 Plate/Sheet, C103 Rod/Wire, C103 Tube, C103 Parts and other kinds of products, welcome to contact our sales team.
    All C-103 alloy components comply with ASTM B652, B654, AMS7852 and AMS7857 specifications. And if you have any special request, we can discuss about it.