Stainless grade question

  1. Mike B Member

    Messages:
    160
    Location:
    North Wales
    Hi everyone,

    Can one of the more experienced metal gurus recommend a few types of stainless for a project?

    I need something in stainless which is highly corrosion resistant and easy to turn, weldability is desired but not essential.

    Seen a few offcuts of 431 on ebay but turns out it's difficult to machine and needs to be pre-heated to weld.

    Any suggestions, or anyone got something suitable lying around?

    Needs to be approx 2.75-3.25" dia round bar, and I need two pieces approx 80mm long

    Thanks for help
     
  2. Munkul

    Munkul Jack of some trades, Master of none

    Messages:
    3,144
    Location:
    Cumbria
    How highly corrosion resistant?

    We tend to use 316L for most things, and started using super duplex 2509 for tanks/pipework subject to low level chloride or sulphide corrosion.

    316L machines pretty well and welds very well. Duplex is quite a bit tougher to machine.

    Then we jump up a huge notch to nickel alloys for anything worse.

    316L is pretty good is passivated properly.
     
    Gwil likes this.
  3. TechnicAl

    TechnicAl Member

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    Rotherham
    What is the application?
     
  4. Mike B Member

    Messages:
    160
    Location:
    North Wales
    I think 316 will fit the bill. It's for a small hydraulic fluid cylinder to be fitted to a trailer.
    Anything with similar properties to 316 that I could also search for? The idea being the more grades I can search for, the more likely to find a cheap(er) offcut from someone.
     
  5. TechnicAl

    TechnicAl Member

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    8,240
    Location:
    Rotherham
    316L will be the cheapest.....other grades are rarer
     
    Mike B likes this.
  6. TechnicAl

    TechnicAl Member

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    8,240
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    Just a thought......you might also look for A4 stainless, which is 316L used in nuts and bolts
     
    Mike B likes this.
  7. Mike B Member

    Messages:
    160
    Location:
    North Wales
    Thanks gents
     
  8. Kram

    Kram Member

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    Sussex
  9. TechnicAl

    TechnicAl Member

    Messages:
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    Location:
    Rotherham
    The F51 is Duplex.....really should be welded with a specific consumable
     
  10. mike os

    mike os just a little insane.....

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    6,971
    Location:
    North Wales
    shouldn't need to be "better" than 316 unless its a really nasty environment
     
  11. Mike B Member

    Messages:
    160
    Location:
    North Wales
    thanks for that link. Tried him but the F51 is apparently difficult to weld unless pre-heated. I found some 316 eventually
     
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