[Public-list] Marine Alloys of bronze

[John Birch]

I saw that - it was great. Didn't know you were involved.
It's not safe now ; )

Cheers,
John
----- Original Message ----- 
From: "Gordon Laco" <mainstay at csolve.net>
To: "Alberg 30 Public List -- open to all" <public-list at alberg30.org>
Sent: Thursday, October 19, 2006 11:56 AM
Subject: Re: [Public-list] Marine Alloys of bronze


> Actually I did have a 3 pounder bronze Verbruggen Gun made a few years 
> ago -
> used it in a documentary for A&E about the real effects of Napoleonic Wars
> era artillery on wooden ships.  A&E bought a condemned wooden fishing
> trawler and filmed me shooting the hell out of it using ball, grape,
> canister and bar shot.  Quite an experience.  The gun is now in our front
> porch... Smashed the steps getting it in.  I had it inside the house for a
> while because (I told my wife) I was afraid someone might steal it.  She 
> saw
> how difficult it was to get in and said it would be quite safe on the 
> porch.
> That's were it is now.
>
> Gord
>
>
>
>
>
>
>
>> Silicon Bronze usually copper / tin sometimes a bit of lead or manganese
>> (Lead & manganese) aid in the flow as a lubricant and usually 1-3% 
>> silicon -
>> becomes harder when worked or rolled. Cupronickel is a copper nickel 
>> hybrid.
>> Manganese Bronze has much more manganese in it than SB (if the SB has any 
>> in
>> it at all). Very much a foundry choice - there are hundreds of 
>> variations.
>> Skene's Elements of Yacht Design has pages on it. Capt Nat built using 
>> SB.
>> That Concordia Gord was talking about on another thread would have likely
>> been fastened with SB
>>
>> SB can be melted down and recast almost infinitely with the components
>> remaining in compound well mixed - has a great lattice structure. 
>> Survives
>> well in aerobic and anaerobic saline solutions unlike SS.
>>
>> Lots on Google on Bronzes.
>>
>> So Gord, gonna cast me some long nines out of LG2 to match the Rush 
>> Baggot ?
>> ; )
>> Can never be too sure ; )
>>
>> Cheers,
>>
>> John
>>
>> ----- Original Message -----
>> From: "Gordon Laco" <mainstay at csolve.net>
>> To: "Alberg 30 Public List -- open to all" <public-list at alberg30.org>
>> Sent: Thursday, October 19, 2006 11:22 AM
>> Subject: [Public-list] Marine Alloys of bronze
>>
>>
>>> OK - I am back in the office... Am not going to go for the wooden boat.
>>> She
>>> is a Concordia yawl - but rescuing her is beyond my means.  I must be
>>> becoming an adult to come to such a rational conclusion...
>>>
>>> Alloys:
>>>
>>> LG2 Gunmetal:
>>>
>>> 85% copper, 5% lead, 5% tin, 5% zinc.
>>>
>>> This alloy is good for portlights, cleats, chocks etc.  Yes, it was once
>>> used for cannon.
>>>
>>> AB2 Aluminium Bronze:
>>>
>>> 83% copper, 10% aluminium, 5% nickel, 3% iron
>>>
>>> Very stiff and strong - great where hardness and strength are required.
>>> Good for chainplates, lifeline stanchions, shackles etc.
>>>
>>> Silicon Bronze
>>>
>>> Sorry, don't have the ingredients for this one but it is good for 
>>> similar
>>> applications to that of AB2, but is not so expensive.  You see this one
>>> most
>>> often in turnbuckles, toggles, pins, fastenings etc.
>>>
>>> Gord #426 Surprise
>>>
>>>
>>>
>>>
>>>
>>>
>>>
>>>
>>>> Gord,
>>>>
>>>> Do you remember the name of the proper alloy of Auminum Bronze?  Metal
>>>> dealers often sell their offcuts on Ebay.  I've seen Aluminum Bronze,
>>>> but never Silicon Bronze.
>>>>
>>>> - George
>>>>
>>>
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>
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