STEELS FOR AUTOMOTIVE COIL SPRINGS WITH IMPROVED RESISTANCE TO RELAXATION

Electron microscopy studies showed that automobile coil springs made of 9260 steel have greater resistance to relaxation than coil springs made of 5160 and 15B62 steels, because the carbides in the 9260 steel are smaller and more closely spaced than the carbides in the other two steels. Further research work established that steels containing nominally 1.0 and 1.25 percent silicon have satisfactory resistance to relaxation. Because of its good resistance to relaxation, and because of its hardenability and cost effectiveness, a 0.60C-0. 9Mn-1.0Si steel containing 0.45 to 0.65 percent chromium has been used for coil springs in several models of General Motors cars since 1977.

  • Supplemental Notes:
    • Prepared for SAE meeting 25-29 February 1980.
  • Corporate Authors:

    Society of Automotive Engineers (SAE)

    400 Commonwealth Drive
    Warrendale, PA  United States  15096
  • Authors:
    • Tata, H J
    • Driscoll, E R
    • Kary, J J
  • Publication Date: 1980-2

Media Info

Subject/Index Terms

Filing Info

  • Accession Number: 00325259
  • Record Type: Publication
  • Source Agency: Engineering Index
  • Report/Paper Numbers: SAE 800480
  • Files: TRIS
  • Created Date: Apr 15 1981 12:00AM