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Paragraph EXPLANATORY NOTE

The materials used for centrifuge rotating components are:

(a)

Maraging steel capable of an ultimate tensile strength of 2.05 x 109 N/m2 (300,000 psi) or more;

(b)

Aluminium alloys capable of an ultimate tensile strength of 0.46 x 109 N/m2 (67,000 psi) or more;

(c)

Filamentary materials suitable for use in composite structures and having a specific modulus of 12.3 x 106m or greater and a specific ultimate tensile strength of 0.3 x 106m or greater (“Specific Modulus” is the Young's Modulus in N/m2 divided by the specific weight in N/m3; “Specific Ultimate Tensile Strength” is the ultimate tensile strength in N/m2 divided by the specific weight in N/m3).