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  1. #1
    Join Date
    Mar 2012

    6061 Aluminum help

    I am looking to do a small machine build that will require machining .75" 6061 Aluminum on a DIY cnc build. I have already done some tests and found that I can machine aluminum successfully.

    My question is this. I have several choices of 6061, flat bar, flat plate & cast aluminum plate. I can get the size for what I need in any of these types, but I don't know which to get. I will be doing most of my machining with a 1/4" coated 3 flute EM with some of the thru holes with a 1/8" coated EM.

    Any help would be welcome. Here is the site that I am looking to purchase from.


  2. #2
    Join Date
    Nov 2007

    Re: 6061 Aluminum help

    The cast jig plate are usually already pre-machined thickness. Between flat bar and plate is all determined on the size of your finished part.

  3. #3

    Re: 6061 Aluminum help

    Hey, in my experience the flat/cast plates could have a bit of a bend (especially if they are not handled/shipped by the supplier properly). It also depends upon how big of a piece are you getting.


  4. #4
    Join Date
    May 2014

    Re: 6061 Aluminum help

    "Plate" is always over sized.......so that you can machine to the actual thickness........Where "stock" could actually be under or exactly the thickness ordered.

    Like said earlier, the part you are making should determine if you can get away with stock or if you need to order plate....

    And also like said earlier...the jig plate is usually already made flat and usually used for jigs.....that will not be machining thickness but you want it flat and parallel.

  5. #5

  6. #6

    Re: 6061 Aluminum help

    The main alloy of 6061 aluminum alloy is magnesium and silicon, and forms Mg2si. If it contains a certain amount of manganese and chromium, it can neutralize the bad effects of titanium and iron; sometimes a small amount of copper or zinc can be added to improve the rigidity of the alloy. The corrosion resistance will not be significantly reduced. A small amount of copper in the conductive material can offset the adverse effects of titanium and iron on the conductive material. Lead can also be added to improve the machinability. Because it contains magnesium and silicon, 6061 aluminum sheethas medium strength, good corrosion resistance, weldability and good oxidation effect.

      The main alloying elements in 6000 series aluminum sheet are magnesium and silicon, which have medium strength, good corrosion resistance, weldability and good oxidation effect. It is widely used in various industrial structural parts that require a certain strength (85-110 degrees) and high corrosion resistance, such as manufacturing trucks, tower buildings, ships, trams, railway vehicles, furniture mechanical parts, machining, molds, etc.

      6061 alloy belongs to Al-Mg alloy. It has good plasticity and corrosion resistance, especially no stress corrosion cracking tendency. It has excellent weldability and strong workability. It is a commonly used alloy. Commonly used in mobile phone interiors, card slots, mobile phone shells, molds, automobile body manufacturing, etc.

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