What's the hardest alloy of aluminum? - Page 2
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  1. #21
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    We are aluminium extrusion and fabrication factory in China. The hardest aluminium alloy is 7049A, and the hardness HBW of 7049AT6 and 7049AT651 is >170. But we don't use this alloy for production as an extruder, and no client ask for this alloy. So till now, the hardest alloy we use for production is 7075 alloy, and the HBW of 7075T6 is >150.
    you can refer to this for 7075 hardness. 7075 T6 Aluminum Bar And Extrusion Profile | Fonnov (CHINA)

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    there are many coatings (metal plating) or surface treatments that can increase hardness and have other beneficial effects
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    if you slide a long aluminum part into a assembly unless it has a type of coating you often create dust, scratches, galling marks.
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    this dust and chips contamination often has such a large effect that the surface treatments and platings applied often cost considerable expense. obviously metal platings come in many types and hardness.
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    the equipment is expensive to apply coatings and it requires expertise. most send parts out to get coated. many race car parts are coated. in NY i have mostly seen parts sent to Swain
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    Swain Tech Coatings | Industrial Coatings | High Performance Racing Coatings | Technical coatings to solve problems of heat, wear, corrosion, and friction

  3. #23
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    What is the hardest alloy of Spam? It's some Chinese shit called critinapt

  4. #24
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    Quote Originally Posted by Larry Dickman View Post
    What is the hardest alloy of Spam? It's some Chinese shit called critinapt
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    they did answer the question on hardest alloys they produce.
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    at least they know what they are talking about and not guessing about seeing how they sell the alloys

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  6. #25
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    they can apply coatings on almost anything. literally they apply a conductive paint on plastics or even baby shoes or a flower like a rose and apply a metal plating on it as thick as needed
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    they been doing that like maybe 150 to 200 years ago. originally it was gold plating things as the plating being thin was cheaper than solid gold
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    plastic rapid prototype parts can be plated with thick metal depends on what part is needed for. aluminum can have many different metals applied to it. thus light weight with high hardness or wear resistance. plasma spraying also can apply coatings

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    Hard is not the correct criteria for a piston. It is retained strength above 300 C, not at room temperature. In that light, 7075, the 4000 series eutectic alloys fail miserably. the super eutectic alloys have very good thermal expansion coefficients, but they do not cool well and their strength wains above 200 C. Rolls Royce developed the best piston alloy for their aero engines during ww2. That alloy is still produced today in many standard forms. It is called 2018 and is still the go to alloy for racing pistons because of its high temperature strength and its heat conduction, which is due to the copper used in the alloy.

  8. #27
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    like i said there are places that specialize is coatings for race car parts.
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    a lot of race cars are extremely expensive. they dont think anything of spending $1000.'s if it means they can win a race

  9. #28
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    2024-T351 is one of the hardest aluminum alloys, widely used in the metal industry.

  10. #29
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    Quote Originally Posted by monu96 View Post
    2024-T351 is one of the hardest aluminum alloys, widely used in the metal industry.
    Better start cracking those textbooks.....and stop spewing wrong answers.

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  12. #30
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    Quote Originally Posted by monu96 View Post
    2024-T351 is one of the hardest aluminum alloys, widely used in the metal industry.
    only if it's military grade billet

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