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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 ℃.

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.