1. 2) ASTM A213-83, Standard Specification for Seamless Ferritic and Austenitic Alloy-Steel Boiler, Superheater and Reheater Tubes (1983)
2. 3) ASME Boiler Pressure Vessel Code, Code Case 1943, Seamless Modified 9Cr-1Mo Section 1 (1983)
3. 4) A. ISEDA, M. KUBOTA, Y. HAYASE, S. Y AMAMOTO and K. YOSHIKAWA : The Sumitomo Search, 36 (1988), p. 17
4. 11) Von F. BRÜHI., K. HAARMANN, G. KLAWA, H. WEBER and M. ZSCHAU : VGB Kraftwerkstechnik, 69 (1989) 12, p. 1215