Abstract
High strength line pipe steels require not only good low temperature toughness but also excellent weldability. The use of cellulose welding electrodes has introduced the possibility of cold cracking due to the introduction of hydrogen. This report deals with the cracking susceptibility of line pipe steels. Test results make it possible to establish a diagram to predict and determine the welding conditions for crackfree girth welds. This diagram contains an emperical parameter, Pw, which includes the alloying composition of the steel, the effective hydrogen concentration at the root of the weld, and the restraining stress. When Pw is plotted against the cooling time (the time to cool from the weld condition to 100 °C), a distinct separation is seen between cracked and crack-free weld joints. Thus, the Pw parameter has utility.
It is found that crackfree girth welds can be made in line pipe steels if the equivalent carbon parameter is sufficiently low. References are given to pertinent literature from the International Institute of Welding (ILW).
References
F. Watkinson, R.G. Baker, and H.F. Tremlette: “Hydrogen Embrittlement in Relation to the Heat Affected Zone Microstructure of Steels,”Brit. Weld. J., 1963, vol. 10, no. 2, pp. 54–62.
J. L. Kane: “Mechanical Properties, Microstructure and Susceptibility to Cracking in the HAZ of Controlled, Niobium Treated, Low Carbon, Manganese Steels,”Brit. Weld, J., 1968, vol. 15, no. 8, pp. 396–407.
T. Boniszewski, F. Watkinson, R.G. Baker, and H.F. Tremlett: “Hydrogen Embrittlement and Heat Affected Zone Cracking in Low Carbon Alloy Steels with Acircular Microstructures,”Brit. Weld. J., 1965, vol. 12, no. 7, pp. 14–36.
T. Boniszewski and R. G. Baker: “Hydrogen Embrittlement in Low Carbon Nickel and Manganese Steels,”Brit. Weld. J., 1965, vol. 12, no. 7, pp. 349–62.
H. Suzuki and M. Inagaki: “Effect of Restraint and Hydrogen on Root Cracking of High Strength Steel Welds (NRIM TRC Test),” IIW Doc. IX-408-64.
C.D. Beachem: “A New Model for Hydrogen-Assisted Cracking (Hydrogen Embrittlement),”Metall. Trans., 1972, vol. 3, no. 2, pp. 437–51.
H. Sasaki, K. Watanabe, S. Kirihara, and I. Sejima: “Effects of Restraint Stress and Intensity of Restraint on Delayed Cracks in the Welds of 80 kg/mm2 High-Strength Thick Plate Steel,” IIW Doc. IX-784-72.
K. Watanabe, S. Kirihara, T. Onuma, and K. Sato: “Studies of Delayed Crack in Welds of High-Strength Steel,” IIW Doc. IX-920-75.
W. F. Savage, E. F. Nippes, and Y. Tokunaga: “Hydrogen Induced Cracking in HY-130 Steel Weldments,”Welding J., April, 1978, 118-s to 126-s.
Y. Ito and K. Bessyo: “Weldability Formula of High Strength Steels,” IIW Doc. IX-576-78.
Y. Ito and K. Bessyo: “A Prediction of Welding Procedure to Avoid Heat Affected Zone Cracking,” IIW Doc. IX-631-69.
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Ito, Y., Nakanishi, M. & Komizo, Y. Cold cracking susceptibility of girth welding for arctic grade line pipe. JMES 4, 110–113 (1982). https://doi.org/10.1007/BF02898278
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DOI: https://doi.org/10.1007/BF02898278