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  • Users: ajensen
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  1. ajensen

    Fatigue on 1100 Untempered Al?

    Hi All, I have an application in which a piece of 1100 untempered Al us bent around a ~2" radius, and then re-formed back to its original flat shape (it starts as a flat sheet). The part is 2" wide x ~6" long x .040" thick, and is bent almost 180 deg around the aforementioned radius by hand...
  2. ajensen

    Ductile Metal That Holds Its Shape?

    I'm selecting a metal material for a project in which the metal needs to be ductile (high plasticity) in order to hand-form minor bends, yet rigid enough once formed to hold its shape when small loads (~ 1 lb)are placed on the formed faces. The forming will happen often (perhaps a hundred...
  3. ajensen

    Semi-Rigid Foam Manufacturer

    Hi All, I am working on the design of a product which will require a semi-rigid foam - think of a case for an iPod...something like this: http://www.amazon.com/Samba-Travel-JBuds-Earbuds-Jacquard/dp/B001GS8G2O/ref=sr_1_3?ie=UTF8&qid=1312474994&sr=8-3 Can anyone recommend a few vendors that...
  4. ajensen

    Electrically Insulative Coating for Steel?

    Hi, I have a small stainless part (think washer, but irregularly shaped) that is about .250" in diameter and between .005" and .010" thick. The part holds a mating piece in position and is designed with fairly tight tolerances (+/- .001" around the profile). I need to electrically insulate...
  5. ajensen

    Magnetic Stainless for Spring?

    Hi All, Can anyone tell me what grade of stainless steel can be used for a spring (curved spring washer) and will have magnetic properties? Thanks!
  6. ajensen

    What material property is used to measure heat transfer capacity?

    I am designing a part that needs good heat transfer capabilities (heat fins) and am comparing a few potential materials. Which property is it that tells me how good its heat transfer capability is? Thermal conductivity? Specific heat capacity? Does a higher number mean better heat transfer?
  7. ajensen

    Surface Finish For Stamped Parts

    Hi All, Is it possible to achieve a 32 microinch surface finish on a stamped piece of thin (~.060") hardened steel (440C...~Rockwell 60)? Could I get even better? 16 microinches? Would post processing be necessary? Thanks, Aleck

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