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  1. MetalMickey

    High Copper 304L

    Thanks for the input guys, to clarify all the other parts of the analysis fit 304L including Ni levels (albeit right at the bottom of the spec). The supplier has stated that the copper level is for deep drawing applications (not applicable to our use) which fits with hacksaws thoughts. I agree...
  2. MetalMickey

    Dimensional change in A36 steel due to stress relieve

    The amount of movement really depends on the amount of residual stress after the welding operation and the geometry of the item. It would be complex to predict (as point out by BillPSU) the movement but some educated assessment could be carried out by looking at the longest spans and sectional...
  3. MetalMickey

    High Copper 304L

    Hi all, Looking at some 304L sheet at the moment with a high copper content of 1.5 wt% which was a suprise!, anyone think of good reasons chemistry may be at this level (everything else within AISI 30L spec) apart from poor scrap availability at the supplier?
  4. MetalMickey

    Job Advertisement, 2 posts û Plumber ú60k, Engineer ú25k.

    Just to add to the good debate started by Chris9, a little experience of my own to help lighten the mood: One leaking bath, two plumbers at £40 per hr plus callout fee failed to fix it. Myself a lowly Materials Engineer admitted defeat and fixed it myself using 5000psi pipeline fittings...
  5. MetalMickey

    Duplex to Carbon Steel Pipe Destec Hub Connections

    In subsea pipelines we produce we would always use an insulating gasket wherever possible. The use of a coating is higher risk due to possible damage or breakdown, or complications due to any CP applied. However knowing the Destec design I think the use of a gasket is going to be pretty...
  6. MetalMickey

    Dropped Object Study

    The dropped object study is an all too real design case that needs to be considered in subsea structures and pipelines. It highlights the probable impact loads that will be applied as a result of the dropped object. If the water is deep enough object will reach terminal velocity. Examples of...
  7. MetalMickey

    steel beams from 1906

    Agree with Stanweld, it is a rimming steel. My concerns would be poor toughness of the material to unexpected loading regimes, and the variation in cross section. Since I guess these have been in action since 1906 so are likely to have had varied loads applied. Given the possibility of stress...
  8. MetalMickey

    Dropped Object Study

    The dropped object study is an all too real design case that needs to be considered in subsea structures and pipelines. It highlights the probable impact loads that will be applied as a result of the dropped object. If the water is deep enough object will reach terminal velocity. Examples of...
  9. MetalMickey

    Cold Rolled steel strip - South America?

    Looking for a cold rolled steel producer in South America, capable of producing thin guage 100KSI grades. Generally ot ASTM A 108 or similar would do. Any suggestions?
  10. MetalMickey

    HIC TEST ..Different result for the same Heat Number?

    You can have failures and passes from the same heat I'm afraid. It suggests the material is near the threshold of resistance to this kind of phenomenon. Suggest you examine the failures to see what the HIC damage is associated, i.e. is it sulphide inclusions, or microstructural variation, these...
  11. MetalMickey

    Low impact testing values for A694 F60 forgings

    Suggest you try an approach on a number of fronts: 1/ Review the forging regime to see if the pre-existing structure has been sufficiently removed (i.e. a minimum of a 5:1 reduction is a good guideline, from starting ingot to final piece (this includes upsetting and becking). This will be...
  12. MetalMickey

    Material properties for AISI 1045 steel

    May sound a bit simple, but since it's only bar stock, to be sure about the material get a piece tested and your local Material Labs or University. A quick micro would also be able to judge it's thermal history. This is the best way to be sure and should only take a couple of days.
  13. MetalMickey

    Subsea Bolts

    The hydrogen embrittlement issue is somethings that really needs to be considered in your selection as Mark62 and TJAvery state. A look through the Norsok standards will give good guidelines on bolt selection through: http://www.standard.no/imaker.exe?id=244 This will irrespective of the...
  14. MetalMickey

    Minimum 1500MPa tubular for use in seawater application

    Many Thanks, I was not looking to scare anyone, under the accidental sewater flooding the compressive and buckling stress the item in subjected to is diminished, due to load sharing. A titanium alloy would work, costing is the issue as ever unfortunately. Looks like a PH grade will the best...
  15. MetalMickey

    Minimum 1500MPa tubular for use in seawater application

    I'm looking for a CRA grade with 1500MPa Yield in tubular or forged condition for use in a pipeline application. The item will only be exposed to seawater in the event of accidental extreme conditions but requires resistance all the same. Size of around 400MM OD with a maximum wall thickness of...
  16. MetalMickey

    316 L seal crevice corrosion?

    A good site to try is www.nidi.org
  17. MetalMickey

    316 L seal crevice corrosion?

    Suggest replacing the 316L with an Inconel seal ring to match the ring groove.
  18. MetalMickey

    316 L seal crevice corrosion?

    Depends on the conditions you have in there, is it allwas stagnant seawater? This kind of arrangement is common, but in this case you may be building up problems for yourself, with even a slight galvanic effects making things worst. If you've got the cash suggest Inconel seal rings and sleep...

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