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Steel Connecting Rods

Steel Connecting Rods. Factory connecting rods are mass produced Cast from regular automotive grade Iron. Reasons: Faster Easier Cheaper. Background. Background Continued. I-Beam design reinforces wrong face 4 stroke engine revolution places: Moment load Compression load Tension load.

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Steel Connecting Rods

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  1. Steel Connecting Rods

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

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

  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 • Poisson’s Ratio: 0.29 • Machinability: 50% • Shear Modulus: 80 GPa All Specifications are for AISI 4340 Steel, normalized, 50 mm round

  8. Any Questions?

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