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3. 5) IACS UR S33: 2013, Requirements for Use of Extremely Thick Steel Plates.
4. 7) ASTM E1221-96: Reapproved 2002, Standard test method for determining plane-strain crack arrest fracture toughness, KIa, of ferritic steels.
5. 8) ASTM E208-95a: Reapproved 2000, Standard test method for conducting drop-weight test to determine nil-ductility transition temperature of ferritic steels.