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  • Users: azzt
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  1. azzt

    bolt head marking

    Hi I have a precision steel bolt M10 x 1.25 and it has a raised letter q on the head. I'm fairly sure this is Japanese. Can anyone tell me if this relates to the material strength or is it something else? Thanks in advance allan
  2. azzt

    simhydraulics/volumetric efficiency

    Hi First time using this software. If one creates a simple circuit with a pump driving a motor. Then altering the pump volumetric efficiency should effect the pump output flow rate. Not in this software, at least it does not effect the steady state volume flow rate. Am I missing something...
  3. azzt

    pneumatic circuits

    Hi I need to find out some info on pneumatic circuit design. In particular, stuff like group memory valve equations and directional control valve equations i.e. how to construct them. Can anyone recommend a text book or some other reference that has this type of stuff in it? Thanks in...
  4. azzt

    flanges: meaning of abreviations

    Hi I've been given a pipeline drawing the the following description for the flanges: 8" SPO CF SR 5K SCH 100 HXL-255 8" SPO CF WN 5K SCH 100 HXL-255 I have no idea what this means apart from (guessing) SCH 100 means pipe schedule 100). Is there some sort of standard for this stuff? I need to...
  5. azzt

    electricity today magazine

    Hi A bit of a longshot but I'm trying to track down copies of the electricity today magazine from 1996, i.e. october and november. I've tried contacting their website but have not had a response after about a week. Any help here would be greatly appreciated. thanks allan
  6. azzt

    aisi 4340 creep rupture data

    Hi I'm trying to find some creep rupture data at elevated temperatures for aisi 4340 steel at conditons other than normalized (which I already have). Ideally for material around about a HRC=45. Any help would be appreciated. Thanks allan
  7. azzt

    S/N diagram and endurance limit

    Hi I'm having a bit of a problem with the ordinate of a S/N diagram, it says that it is maximum stress, which I find a bit strange. I can understand this if the stress ratio =min/max =-1 then the mean stress will be zero and hence the alternating stress amplitude will be max stress / 2...
  8. azzt

    low cycle thermal fatigue: nimonic 80a

    Hi I'm trying to find the Paris Law constants for Nimonic 80A. I thought this would be easy as it's quite an old alloy, obviously not :-) Any pointers would be extremely useful. Thanks in advance. allan
  9. azzt

    roark formula for stress and strain 5th ed

    Hi I've found an article to calculate shroud loadings on turbine blades but it refers to Roark 5th edition p294, to calculate shear stresses by a graphical method. Unfortunately I only have the 6th edition and p294 is all about circular arches. Does anyone know if the proceedure on p294 of...
  10. azzt

    nimonic 90

    Hi I'm trying to find fatigue crack growth data of nimonic 90 at elevated temperatures. Can anyone assist me please? Thanks in advance allan
  11. azzt

    hirth coupling

    Hi I'm looking for any info on the design of hirth teeth, primarily why the need for such a high surface finish and tolerance. I'm guessing the high tolerance is an alignment thing as probably these coupling are used for high speed applications. Anything would be useful. I've already viewed...
  12. azzt

    fatigue analysis

    Hi I'm looking for some tutorials on a fatigue analysis? Can anybody help? thanks allan
  13. azzt

    fatigue analysis in ansys

    Hi I'm looking for some tutorials on fatigue analysis in ansys. Can anyone help? thanks allan
  14. azzt

    youngs modulus and forging

    Hi I'm currently reverse engineering a gas turbine inlet stub shaft, which I know has been produced by forging. Due to the small amount of these parts rquired per year it has been suggested to use rolled bar and machine to the finished size with heat treatment and so on. The question I have is...
  15. azzt

    joint coating

    Hi I'm trying to determine the coating on a stainless steel (316) joint. It is white and easily scraped off with a coin. Air is it the pipeline at about 10 bar 200 deg C. Any help is appreciated. allan
  16. azzt

    coating for springs

    Hi I need to specify a coating for a helical spring to help prevent corrosion to temperatures up to about 300C. Any help based on experience would be greatly appreciated. Thanks allan
  17. azzt

    gas and liquid corrosion on mar m 247

    Hi I am looking for information regarding the effects of liquid and sour gas fuel (compared to natural gas) on gas turbine blades cast in MAR-M-247. any help greatly appreciated Thanks allan
  18. azzt

    material properties 826M40

    Hi I'm looking for properties of 826M40, specifically Youngs Modulus, Modulus of Rigidity and coefficient of expansion. I've already done a search through this form which produced some info but, not what I'm looking for. Can anybody give me some assistance please. Thanks allan
  19. azzt

    mar-m-247

    Hi I'm looking for mechanical properties of the nickel base alloy mar-m-247. Can anybody help me. Thanks in advance.
  20. azzt

    seal manufacturer

    Hi I'm trying to track down a seal manufacturer called Klipper, can anybody help. Already done the search engine thing. Thanks allan

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