1. ASTM Standard E 399-83. Standard test method for plane strain fracture toughness of metallic materials. Annual book of ASTM standards. American Society for Testing and Materials, Philadelphia, PA; 1989.
2. ASTM Standard E 1820-01. Standard test method for measurement of fracture toughness. Annual book of ASTM standards. ASTM International, West Conshohocken, PA; 2003.
3. ASTM Standard E 1921-02. Standard test method for determination of reference temperature T0 for ferritic steels in the transition range. Annual book of ASTM standards. American Society for Testing and Materials, West Conshohocken, PA; 2002.
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