Advertisement

Metal Science and Heat Treatment

, Volume 19, Issue 7, pp 543–555 | Cite as

Pearlite-reduced HSLA steels for line pipe

  • G. Tither
  • W. E. Lauprecht
Soviet-American Symposium
  • 115 Downloads

Summary

The rapid progress in understanding the metallurgy of ferrite-pearlite steels has led to the development of high-strength, tough pearlite-reduced steels capable of meeting stringent Arctic line pipe specifications. The classical Nb or Nb-V pearlite-reduced steels may be used in cold climates although it appears that heavy controlled-rolling schedules are required to produce X70 properties in heavy-wall (19-mm) pipe. These steels have been shown to provide a dequate properties in thinner sections. Recent commercial experience with a molybdenum-modified pearlite-reduced steel has confirmed the laboratory results for longitudinally welded pipe reported in the present paper. The Mo-Nb steel exhibited a yield strength in excess of 480 MPa, coupled with good toughness in a 19.7-mm-thick wall pipe. This steel was not subjected to heavy controlled rolling and the finish-rolling temperature was 760°C. Spiral-welded X70 pipe has been commercially produced using the Mo-Nb pearlite-reduced steel, and laboratory results predict that a pipe yield strength of at least 540 MPa should be attainable in similar steel compositions when tested to API specifications. The probable introduction of new processing techniques, e.g., water cooling, either during rolling or after rolling, will undoubtedly upgrade pearlite-reduced steels for application under more demanding conditions.

Keywords

Yield Strength HSLA Steel Wall Pipe Control Rolling Steel Composition 
These keywords were added by machine and not by the authors. This process is experimental and the keywords may be updated as the learning algorithm improves.

Preview

Unable to display preview. Download preview PDF.

Unable to display preview. Download preview PDF.

Literature cited

  1. 1.
    E. O. Hall, Proc. Phys. Soc.,B, 64, 747 (1951).Google Scholar
  2. 2.
    N. J. Petch, J. Iron Steel Inst.,174, 25 747 (1951).Google Scholar
  3. 3.
    N. J. Petch, "The ductile-cleavage transition in alpha-iron," Proceedings of the Swampscott Conf., Swampscott, Mass., April 12–16, 1959, MIT Press (1959).Google Scholar
  4. 4.
    J. A. Jones, Discussion to paper by W. J. Berry, The Iron and Coal Trades Review, June 15, 1928, p. 901.Google Scholar
  5. 5.
    R. W. Vanderbeck, Welding Research Supplement, March, 1958, p. 114.Google Scholar
  6. 6.
    U. S. Patent No. 2,158,651, May 16, 1939.Google Scholar
  7. 7.
    Great Lakes Steel Corporation, Mech. Eng.,81, No. 1, 53 (1959).Google Scholar
  8. 8.
    F. W. Starratt, J. Metals,10, No. 12 799 (1958).Google Scholar
  9. 9.
    W. B. Morrison and J. H. Woodhead, J. Iron Steel Inst.,201, No. 1, 43 (1963).Google Scholar
  10. 10.
    W. B. Morrison, J. Iron Steel Inst.,201, No. 4, 317 (1963).Google Scholar
  11. 11.
    W. E. Duckworth et al., J. Iron Steel Inst.,203, No. 11, 1108 (1965).Google Scholar
  12. 12.
    F. B. Pickering and T. Gladman, "The metallurgical developments in carbon steels," ISI Special Report No. 81, 10 (1963).Google Scholar
  13. 13.
    K. W. Burns and F. B. Pickering, J. Iron Steel Inst.,202, No. 11, 899 (1964).Google Scholar
  14. 14.
    J. J. Irani et al., "Strong, tough structural steels," ISI Publication No. 104, 110 (1967).Google Scholar
  15. 15.
    W. S. Owen, ISI Special Report No. 81, 1 (1963).Google Scholar
  16. 16.
    J. Dearden and H. O'Neill, Trans. Inst. Welding, Vol. 3, October, 1940, p. 204.Google Scholar
  17. 17.
    ISI Publication No. 104 (1967).Google Scholar
  18. 18.
    G. Tither et al., Revue de Metallurgie,72 No. 4, 329 (1975).Google Scholar
  19. 19.
    H. Watanabe, "Precipitation kinetics of columbium carbonitride in austenite of high-strength low-alloy stell," Ph. D. Thesis, University of Michigan, Ann Arbor, Michigan, December 14, 1975, presented at AIME Conference on Hot Deformation of Austenite, Cincinnati, Ohio, November, 1975, to be published in Met. Trans. A.Google Scholar
  20. 20.
    H. N. Lander et al., Trans. Iron Steel Inst. Jpn.,14, No. 6, 419 (1974).Google Scholar
  21. 21.
    G. Tither and M. Lavite, J. Metals,27, No. 9, 15 (1975).Google Scholar
  22. 22.
    T. Taira et al., "Bauschinger effect on large-diameter welded line pipe," Proceedings of Fifteenth Mechanical Working and Steel Processing Conference, Pittsburgh, Pennsylvania, January 24, 1973.Google Scholar
  23. 23.
    G. Tither, Mosaic,1, No. 3, 2 (1976).Google Scholar
  24. 24.
    A. P. Coldren and G. Tither, J. Metals,28, No. 5, 5 (1976).Google Scholar
  25. 25.
    A. P. Coldren and J. L. Mihelich, "Acicular ferrite HSLA steels for line pipe," "Molybdenum-containing steels for gas and oil industry applications," Climax Molybdenum Co. Publication No. M-321, 14 (1976).Google Scholar
  26. 26.
    T. Tanaka et al., "Development of high-strength steel with good toughness at Arctic temperatures for large-diameter line pipe," Proceedings of Microalloying '75 Conference, Washington, D. C., October, 1975.Google Scholar
  27. 27.
    T. Yamaguchi et al., "Effect of processing conditions on the mechanical properties of controlled-rolled plate for large-diameter line pipe," Proceedings of Microalloying '75 Conference, Washington, D.C., October, 1975.Google Scholar
  28. 28.
    A. W. Hutnik and J. B. Hemphill, "Production processing and properties of low sulfur steels," presented at 57th National Open Hearth and Basic Oxygen Conference of AIME, Atlantic City, N. J., April, 1974.Google Scholar
  29. 29.
    P. E. Repas, "Control of strength and toughness in hot-rolled low-carbon manganese-molybdenum-columbium-vanadium steels," Proceedings of Microalloying '75 Conference, Washington, D.C., October, 1975.Google Scholar
  30. 30.
    M. L. LaFrance et al., "Use of microalloyed steels in the manufacture of controlled-rolled plates for pipe," Proceedings of Microalloying '75 Conference, Washington, D.C., October, 1975.Google Scholar
  31. 31.
    A. M. Sage, "Report on development of X70 steel for line pipe," Vanitec Publication, August, 1975.Google Scholar
  32. 32.
    Kawasaki Steel Corporation, "Hot-rolled steel coil for spiral-welded high-test line pipe," November, 1975.Google Scholar

Copyright information

© Plenum Publishing Corporation 1977

Authors and Affiliations

  • G. Tither
    • 1
  • W. E. Lauprecht
    • 2
  1. 1.Climax Molybdenum Co. of MichiganUSA
  2. 2.Metallurgical DevelopmentClimax Molybdenum Co.USA

Personalised recommendations