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  1. #436
    Charter Member
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    Quote Originally Posted by Robot View Post
    Attachment 1696161


    Roman Bronze

    Number of samples 1st century 191

    Zn (Zinc)...10%... Sn (Tin)...4-2%... Pb (Lead)...2-2%... Cu (Copper)...Balance
    Bronze is alloyed with Tin - not Zinc.

    https://www.metalsupermarkets.com/di...-brass-bronze/

  2. #437
    Charter Member
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    Oak Island Treasure

    Could It Be...Phosphor Bronze?

    Quote Originally Posted by Clay Diggins View Post
    Bronze is alloyed with Tin - not Zinc./
    Bronze can be made with other alloys as in Phosphor Bronze






    Effect of Zinc on Strength and Electrical Conductivity in Phosphor Bronze

    Alloy Fe P Sn Zn Cu Electrical
    Conductivity
    %IACS
    Tensile
    Strength
    Ksi (MPa)
    Yield
    Strength
    Ksi (MPa)
    2.2 0.06 1.8 Bal 33 99 (682) 96 (662)
    2.2 0.06 1.8 5 Bal 29 99 (682) 94 (648)
    2.2 0.06 1.8 10 Bal 25 108 (745) 101 (696)
    Last edited by Robot; Mar 27, 2019 at 05:15 PM.
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  3. #438
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    Quote Originally Posted by Robot View Post
    Bronze can be made with other alloys as in Phosphor Bronze
    Phosphor Bronze is a very modern metal. When Zinc is added it becomes brass.

    https://en.wikipedia.org/wiki/Phosphor_bronze

    Around 2001, the Olin Corporation developed another alloy for use in electrical and electronic connectors which they referred to as "phosphor bronze".[6] Its composition was as follows:

    Zinc – 9.9%
    Tin – 2.2%
    Iron – 1.9%
    Phosphorus – 0.03%
    Copper – 85.97%

    When assessed in strictly metallurgical terms it is not a phosphor bronze, but a form of iron-modified tin brass.
    Copper alloyed with Tin is Bronze metal.
    Copper alloyed with Zinc is Brass metal.

  4. #439
    Charter Member
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    Oak Island Treasure

    A Rose By Any Other Name...Would Smell As Sweet!

    Quote Originally Posted by Clay Diggins View Post
    Phosphor Bronze is a very modern metal. When Zinc is added it becomes brass.

    https://en.wikipedia.org/wiki/Phosphor_bronze



    Copper alloyed with Tin is Bronze metal.
    Copper alloyed with Zinc is Brass metal.
    And if the Romans made this...Strap End...with this same Metallurgic Recipe Verified... by Strengthening Copper with Zinc rather than Tin...which today is a form of Phosphor Bronze...then by finding this ancient Roman Strap End... Proves that they had this knowledge prior of the invention of Zinc fortified Phosphor Bronze!


    https://www.copper.org/publications/...or_bronze.html
    Mintberrycrunch likes this.
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  5. #440
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    You can call a cat a horse if you want.

    If copper is alloyed with Zinc it is brass - no matter how much phosphorous is added.

    In any case there is no evidence the piece in question is bronze, nor does it contain phosphorus.

    As I pointed out previously the inclusion of lead points to a machine age brass formula. Lead does not alloy with brass but it mixes fairly well and provides lubrication for machine tooling.
    Last edited by Clay Diggins; Mar 27, 2019 at 07:14 PM.
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  6. #441
    Charter Member
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    Oak Island Treasure

    I Would Never Call A Cat A Horse...Nor...Zinc Alloyed With Copper...Only Brass!

    Quote Originally Posted by Clay Diggins View Post
    You can call a cat a horse if you want.

    If copper is alloyed with Zinc it is brass - no matter how much phosphorous is added.

    In any case there is no evidence the piece in question is bronze, nor does it contain phosphorus.

    As I pointed out previously the inclusion of lead points to a machine age brass formula. Lead does not alloy with brass but it mixes fairly well and provides lubrication for machine tooling.

    Click image for larger version. 

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    Clay Diggins likes this.
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  7. #442
    us
    Lost?Mind

    Feb 2015
    Greenville, South Carolina
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    Metal Detecting
    I seen one of these posted about six months ago, but I can't remember if anybody I.d it. Good luck finding your answer. Cool pc.
    Mintberrycrunch likes this.

  8. #443
    us
    Mar 2016
    Michigan
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    All Types Of Treasure Hunting
    Thanks for having your people taking a look. And thanks to everyone for any new ideas and continued interest

  9. #444

    Feb 2018
    2
    2 times
    All Types Of Treasure Hunting
    I think it held a burning rope that was used to light off a flash pan on an old rifle or musket.The rope was inches long and always stayed lit, you held this between two fingers for faster shooting. Just my guess...
    Last edited by Crowslot; Apr 23, 2019 at 06:45 PM.

  10. #445
    Charter Member
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    Oak Island Treasure

    Welcome To The Show...Crowslot!

    Quote Originally Posted by Crowslot View Post
    I think it held a burning rope that was used to light off a flash pan on an old rifle or musket.The rope was inches long and always stayed lit, you held this between two fingers for faster shooting. Just my guess...
    Interesting Theory!

    Do you have some "Research" to prove your...Speculation?

    There may be some!

    Please pursue.

    Click image for larger version. 

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    Attached Thumbnails Attached Thumbnails Click image for larger version. 

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    Bigcypresshunter likes this.
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  11. #446
    us
    Mar 2016
    Michigan
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    All Types Of Treasure Hunting
    Bump

  12. #447
    us
    Mar 2016
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    All Types Of Treasure Hunting
    In case anyone new wants to read 30 pages
    DCMatt likes this.

  13. #448
    us
    Mar 2016
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    All Types Of Treasure Hunting
    Still unsolved
    Toecutter and flyadive like this.

 

 
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