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4340 Steel Connecting Rods

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AISI 4340 'H' BEAM SUPER RACING ROD - 3D . C.A.T. Power Engine Parts. ... Summit Racing Equipment. ( 2006). ESP-6625PP3D. AUTOSALES, Inc. ... – PowerPoint PPT presentation

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Title: 4340 Steel Connecting Rods


1
4340 Steel Connecting Rods
  • Javier A. Lozano
  • Material Science
  • MEEN 3344

2
Background
  • Factory connecting rods are mass produced
  • Cast from regular automotive grade Iron
  • Reasons
  • Faster
  • Easier
  • Cheaper

3
Background Continued
  • I-Beam design reinforces wrong face
  • 4 stroke engine revolution places
  • Moment load
  • Compression load
  • Tension load

4
When Regular Rods Go Bad
  • Factory Rods are usually the weak link

5
New Design, New Material
  • New H-Beam design places reinforcement on the
    proper face
  • AISI 4340 Steel is the most common
  • Other Materials also used
  • Titanium
  • 7075 T-6 Aluminum
  • Nodular Iron
  • Pearlite Iron
  • 5140 Steel

6
H-Beam Design
  • Designed on AutoCAD for low weight, high strength
  • 800 HP and 7,500 Rpm Rating (for Pontiac)
  • Rods and Caps are forged separately
  • Optimizes grain flow
  • Enhances structural Integrity
  • Higher Quality control than factory

7
Specifications of AISI 4340 Steel
  • Density 7.85 g/cm3
  • Tensile Strength (Ultimate) 1220 MPa
  • Tensile Strength (Yield) 786 MPa
  • Percent Elongation at Break 13.5
  • Percent Reduction of Area 37.3
  • Modulus of Elasticity 205 GPa
  • Poissons Ratio 0.29
  • Machinability 50
  • Shear Modulus 80 GPa
  • All Specifications are for AISI 4340 Steel,
    normalized, 50 mm round

8
References
  • Callister, William D. Fundamentals of Material
    Science and Engineering an integrated approach.
    Hoboken John Wiley Sons, Inc, 2005.
  • C.A.T. (2005). AISI 4340 "H" BEAM SUPER RACING
    ROD - 3D. C.A.T. Power Engine Parts. Retrieved
    February 22, 2006. from http//www.catpep.com/catp
    roducts/connectingrod/4340HBeamsuperracingrod.asp
  • Eagle S P. (2006). "ESP" H-beam connecting rods.
    Eagle Specialty Products, Inc. Retrieved February
    28, 2006. from http//www.eaglerod.com/
  • ASM Material Data Sheet. (2003). AISI 4340 Steel,
    normalized, 50 mm (2 in.) round. ASM Aerospace
    Specification Metals, Inc. Retrieved February 24,
    2006. from http//asm.matweb.com/search/SpecificMa
    terial.asp?bassnumM434AD
  • Summit Racing Equipment. (2006). ESP-6625PP3D.
    AUTOSALES, Inc. http//store.summitracing.com/defa
    ult.asp?target/egnsearch.aspN400075
  • Wikipedia. (2006). Connecting Rod Wikipedia,
    the free Encyclopedia. Wikimedia Foundation, Inc.
    Retrieved January 1, 2006. http//en.wikipedia.org
    /wiki/Connecting_rod

9
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