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  1. Zandor20

    Impact Loads on Buildings

    Is there any info out there about calculating impact loads on buildings, i.e. aircraft, missiles, blast effects, etc. Assuming the kinetic energy of the projectile will be absorbed by the building as it deforms. How would you calculate an equivalent static load?
  2. Zandor20

    Asking for the right heat treatment

    After calling a few steel suppliers, 4140 in tubing of the thin walled variety are difficult to obtain, or require a large order. I can buy 4130 tubing all day in any length and size. The local heat treat company has some concerns about water quenching a thin walled tube of 4130, and wants to...
  3. Zandor20

    Sway Bar Design - Heat Treatment

    1.25" O.D. x 0.095" wall
  4. Zandor20

    Asking for the right heat treatment

    After talking with a couple of aftermarket sway bar manufacturers, they are using 4130 and 4140 for their hollow bars HT to a rockwell of 37-40, and their solid bars are 4340 HT to rockwell 40-44. They did not know what kind of mechanical properties their bars had. What kind of properties are...
  5. Zandor20

    Asking for the right heat treatment

    I am using tubing with wall thicknesses of 0.083" to 0.120", i.e. not very thick. Does this affect what you guys have discussed? Thanks for all the help.
  6. Zandor20

    Sway Bar Design - Heat Treatment

    From arm to arm it is 26", with around 9.4 degrees of twist at one end. I am planning on using 10 to 12" arms right now. All calculations assumed 10" arms.
  7. Zandor20

    Asking for the right heat treatment

    I am fabricating a rear sway bar for a race car. I was planning on using 4130 steel tubing, but have the option of using 4140 or 4340 if that would be more appropriate. Based on my stress calculations for a tube under torsion, I need to have a yield point of 167,500 psi. 4130 in the normalized...
  8. Zandor20

    Sway Bar Design - Heat Treatment

    I am fabricating a rear sway bar on a race car. My question is related to what type of steel to use and the appropriate heat treatment to specify. I was planning on using 4130 - 1.25"O.D. x 0.095 wall Would 4140 or 4340 steel be something to consider. Based on my stress calculations, I...

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