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  • Fastener Failure Analysis: Preventable Fatigue Failure
    . The fractured bolts had been in service for less than three months. In addition to the fractured bolts, two additional bolts that had been in service for four to five years without failure were submitted for comparative analysis. All bolts were reportedly SAE Grade 5 bolts. The two intact "old bolts " were
  • Fastener Failure Analysis: Automotive Hex Head Cap Screw Case
    , and tensile strength requirements of SAE J1199 (Mar2001) M20 Class 8.8 products. If the fasteners had exhibited a single fracture origin one might expect that the fracture had initiated due to the presence of a specific flaw or area of stress concentration. On the contrary, multiple fatigue fracture origins
  • Proper Fastener Selection and Application are Key to Bolted Joints That Won't Loosen or Lose Clamping Force
    New Criteria of Self-Loosening of Fasteners Under Vibration, Gerhard H. Junker, SAE Paper No. 69005 1969 Loosening of Fasteners by Vibration, R. C. Baubles, G.J. McCormick, C.C. Faromi, 1996 An Introduction to the Design and Behavior of Bolted Joints, Threaded-fastener technology has been around
  • Determining Whether a Ring is Carbon or Stainless Steel
    SAE 1060-1090 Carbon Steel and PH 15-7 MO Stainless react differently to nitric acid. A drop of nitric acid placed on carbon steel will cause the steel to become dark in color. When placed on stainless, the material will not change in color. Holding a portion of the ring against a grinding wheel
  • Applications
    and a minimum yield strength of 50,000 psi. Special high-strength fasteners, comparable in strength to SAE grade 5 bolts, are also available. Capacitor-discharge fasteners are generally made from C-1008 to C-1010 steels in the annealed condition. Tensile strengths are 40,000 to 50,000 psi. Austenitic
  • How to Calculate Installation Stress of a Retaining Ring
    : Material. Thickness (in.). Minimum Tensile Strength (psi). Carbon Spring Steel. Tempered SAE 1060-1095. .006-.014. .0141-.021. .0211-.043. .0431 and larger. 269,000. 255,000. 221,000. 211,000. Stainless Steel. Type 302. .002-.022. .0221-.047. .0471-.062. .0621-.074. .0741-.089. .0891-.095. 210,000. 200,000
  • SteeLog (R) - A Metallurgical Dictionary
    in processing, usually from heating in presence of air. Airblasting - A cleaning operation, as cleaning sand from molds. AISI Steels - Steels of the American Iron and Steel Institute. Common and alloy steels have been numbered in a system essentially the same as the SAE. The AISI system is more
  • Metallurgical Insights for Induction Heat Treaters. Part 5: Super-Hardening Phenomenon (.pdf)
    , C.R.Brooks, T.R.Watkins, and V.Rudnev, Effect of prior microstructure on. ability test[6]. It was possible to provide a sufficient. the hardness and residual stress distribution in induction hardened steels, Proc. SAE Intl. cooling severity and obtain surface hardness of about. Off-Highway Cong., Las Vegas