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  1. jzhaan55

    Best way to remove hot dip galvanized coating?

    I have a bolt that is HDG and I would like to remove the zinc layer to look at the cracking under the microscope. What is the easiest way to remove this coating without damaging the base metal?
  2. jzhaan55

    Introduction to Fracture Mechanics

    Perfect thanks!
  3. jzhaan55

    Question about MSDS Requirements

    If I receive the same type of steel coils from over 50 different suppliers, but the material is to the same ASTM spec, do I need to make all of these different MSDS sheets available to the public or can I create one consolidated MSDS sheet? Is this legal? If anyone could point me in the right...
  4. jzhaan55

    Introduction to Fracture Mechanics

    Anyone have a good resource for reading up on fracture mechanics with relation to metals.? An online resource would be preferable.
  5. jzhaan55

    Threaded Rod Tensile Testing

    Awesome thanks. If the max tensile strength of A36 is 80ksi, how do I calculate the maximum load that a 7/8"-9 rod could theoretically take?
  6. jzhaan55

    Threaded Rod Tensile Testing

    I want to do a standard tensile test on a A36 threaded rod (1"-8 threads). I was planning on threading large steel plates to the top and bottom of the rod so that the tensile tester can clamp onto these plates for easier mounting. Is there a way to calculate the minimum thread engagement length...
  7. jzhaan55

    Low-Cycle Fatigue

    are there any good equations to model this fatigue?
  8. jzhaan55

    Low-Cycle Fatigue

    So you're saying since the material is work hardened, that after one bend is achieved (downward), then the upward bend will actually occur on a different part of the material adjacent to the first bend?
  9. jzhaan55

    Low-Cycle Fatigue

    If I have a rectangular sheet of gauge 12 steel (33 Fy, 45 Fu, 30% elongation), is there an easy way to estimate how many times that I can bend the sheet back and forth (holding the lower half in a vise and bending the upper half back and forth in 180 deg. cycles) before it starts to crack? Is...
  10. jzhaan55

    Is the difference between tensile strength and yield strength a good measure of ductility?

    Since a 100% brittle material will have no difference between tensile strength and yield strength, would taking the difference between these two values for a ductile metal be a good indication of its ductility? Is there some sort of formula I can use for this?
  11. jzhaan55

    Strain-Age Embrittlement

    also if i have, say, a653 steel and i want to know the ductile to brittle transition temp, is there a good reference to look this up or do i need to perform the testing on my own?
  12. jzhaan55

    Strain-Age Embrittlement

    The sample is a threaded rod and hardness testing will be an issue because of the case hardening. I could cut the rods in half at the bend site and just compare core hardness values. Do hardness values directly relate to the strain-age embrittlement process. In other words, if the strained area...
  13. jzhaan55

    Strain-Age Embrittlement

    I have a galvanized zinc rod that is to be bent 20 degrees and I would like to test for the susceptibility for strain-age embrittlement of the final product (since the rod was bent after the hot dip galvanizing process and there will be inherent strain). Since this process will occur naturally...
  14. jzhaan55

    Relationship between strength and ductility? (Fu/Fy ratio vs. ductility?)

    Basically I have a bunch of steel sheets that will crack when bent back and fourth three times. The sheets come with mill certs and are rejected if they have a % elongation of below 28%. If they are below 28%, we file a non conformance report and must do an extra bend test to make sure that they...
  15. jzhaan55

    Relationship between strength and ductility? (Fu/Fy ratio vs. ductility?)

    I want the material to be more ductile so that it can be bent back and forth several times without cracking. Would this be a measure of fracture toughness instead? I'm lost any help would be great.
  16. jzhaan55

    Relationship between strength and ductility? (Fu/Fy ratio vs. ductility?)

    Is there a relationship between strength and ductility for structural steel? In other words, does the Fu/Fy ratio have any connection to the ductility of a metal? If you take a metal rod with 20% elongation before fracture with a yeild strength of 33 KSI and a tensile strength of 45 KSI, how...

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