1. G.R. Speich, D.S. Dabkowski, and L.F. Porter:Metall. Trans., 1973, vol. 4, pp. 303–15.
2. Dr. J. Defillippi: United States Steel Technical Center, Monroeville, PA, private communication, 1986.
3. ASTM E8-81,1983 Annual Book of ASTM Standards, ASTM, Philadelphia, PA, 1983, p. 197.
4. ASTM E-646-78,1983 Annual Book of ASTM Standards, ASTM, Philadelphia, PA, 1983, p. 755.
5. D.A. Corrigan, R.E. Travis, V.P. Ardito, and CM. Adams, Jr.:Weld. Res. Suppl., 1962, March, pp. 123s-128s.