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Hafnium Rod / Bar

hafnium rod

Application of Hafnium Rod / Bar

Hafnium is used as a control material in nuclear reactors. At present, almost all Marine water-cooled reactors use pure Hafnium atomic grade as control rods.
In addition, small and medium-sized power grids in remote areas, seawater desalination, industrial heating, residential heating and other small reactors also commonly use atomic Hafnium as control rods.

hafnium bar

Some high - flux research test reactors also use atomic - grade Hafnium as control rods.

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    • Properties of Hafnium Rod / Bar

    Mechanical properties of hot rolled and cold processed Hafnium Rod / Bar
    Grade Status Temperature/℃ Tensile strength/MPa Yield strength/MPa Elongation/% Standard
    R1 annealed room temperature 448 172 22 ASTM B737
    316 275 110 32 ASTM B737
    R2 annealed room temperature 517 241 20 ASTM B737
    316 310 138 30 ASTM B737
    Grades and chemical compositions of Hafnium Rod / Bar in hot rolling and cold processing
    Grade Chemical composition (mass fraction)/%≤
    Hf Zr Al C Cr Cu H Fe Mo Ni Nb
    R1 Balance - 0.010 0.015 0.010 0.010 0.0025 0.050 0.0020 0.0050 0.010
    R3 Balance - 0.050 0.025 0.050 - 0.0050 0.0750 - - -
    Grade Chemical composition (mass fraction)/%≤ Standard
    O Si Ti Ta Sn W U V N
    R1 0.040 0.010 0.010 0.020 0.0050 0.0150 0.0010 0.0050 0.010 ASTM B737
    R3 0.130 0.050 0.050 - - 0.0150 - - 0.0150 ASTM B737
    Mechanical properties of Hafnium Rods for nuclear use
    Grade Status Test temperature℃ Tensile strength Rm/MPa Specify plastic elongation
    strength Rp0.2/MPa    		 Elongation after
    break A50/%
    R1 recrystallization annealing room temperature ≥400 ≥150 ≥22