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  • Users: yacpro13
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  1. yacpro13

    Maximum Diameter for hardening low-alloy steels (AISI 4130, 4140, 4340)

    Good day, This has been bothering me for a while: The table attached is from the MIL-HDBK-5H. We often specify heat treatment on these steels in the range of 125-145 KSI (usually purchased in the heat-treated condition) or 145-160 KSI (requires additional heat treating). Both these ranges are...
  2. yacpro13

    Heat Treating and material ductility

    Hello, I have a small cylindrical adapter D=2" L=8". For the strength needed, according to MIL-HDBK-5H table 2.3.0.2, I should use 4340 over 4140 since 4140 has a maximum diameter of 1" for quenching & tempering. The question I have is especially regarding material ductility. I can establish...
  3. yacpro13

    Where do you get your Material Properties from?

    Hello, I have a very simple question: where do you get your material properties from, either for hand calcs or FEA? So far, I've been using a combination of textbooks, Machinery Handbook and Matweb. I would like to buy a single authoritative book for all the times I need a material property. I...
  4. yacpro13

    Cantilever press fit shaft/dowel pin bending

    Hi everyone, quick question for you: Imagine we have a 1/2" diameter dowel pin/ground shaft, 2" in length, with the first inch press fitted in a steel 'immovable plate', and with the other inch horizontally sticking out, a la cantilever beam. Assume the dowel pin carries a certain load...
  5. yacpro13

    Question on how to calculate moment of intertia of an assembly.

    Hi everyone, see the image attached. As you can see, there are 2 different assemblie. The assembly on the left consists of just a single machined part. The assembly on the right concists of two machined parts. Both assemblies (ie. on the right and on the left) have the same over all...
  6. yacpro13

    Anybody using FEMdesigner FEA software?

    Hi everyone, I've been looking for an FEA software for some time now. I do 3D design work in Solidworks (PRO, without the simulation add on - actually it has a lite 'express' version). So far I've been checking my designs by hand, and I have used the trial version of Solidworks simulation and...
  7. yacpro13

    Anybody using FEMdesigner FEA software?

    Hi everyone, I've been looking for an FEA software for some time now. I do 3D design work in Solidworks (PRO, without the simulation add on - actually it has a lite 'express' version). So far I've been checking my designs by hand, and I have used the trial version of Solidworks simulation and...
  8. yacpro13

    Let's have a discussion on position tolerance of dowel pins

    Hi guys, I'm finally signed up as a member here on eng-tips. Been reading the forums for longer than I can remember, was great help through school and now graduated 1 year ago. So I'd like to discuss about position tolerances of dowel pins. For example, let's say we have Part#1 with two 0.250...

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