<html><body><div style="color:#000; background-color:#fff; font-family:HelveticaNeue, Helvetica Neue, Helvetica, Arial, Lucida Grande, sans-serif;font-size:16px"><div id="yui_3_16_0_1_1430509333846_15760"><span>Hi Scott,</span></div><div dir="ltr" id="yui_3_16_0_1_1430509333846_15759"><span id="yui_3_16_0_1_1430509333846_15993">it's probably 4 x the price of steel.</span></div><div dir="ltr" id="yui_3_16_0_1_1430509333846_15758"><span id="yui_3_16_0_1_1430509333846_15821">Phil makes his exosuit out of cast A356 alluminium.</span></div><div dir="ltr" id="yui_3_16_0_1_1430509333846_15758">There are holes created during the casting process that in his instance</div><div dir="ltr" id="yui_3_16_0_1_1430509333846_15758">are filled with expoxy which is forced in under pressure. Then it is hard</div><div dir="ltr" id="yui_3_16_0_1_1430509333846_15758">anodized. As he said you would think the process would be the other way round.</div><div dir="ltr" id="yui_3_16_0_1_1430509333846_15758">I doubt you would find anyone with an anodizing bath big enough for what you want.</div><div dir="ltr" id="yui_3_16_0_1_1430509333846_15758"><span id="yui_3_16_0_1_1430509333846_16013">Casting wouldn't be an option due to expense & again finding a bath the size you</span></div><div dir="ltr" id="yui_3_16_0_1_1430509333846_15758"><span id="yui_3_16_0_1_1430509333846_16135">need for post casting </span>heat treatment would be a problem.</div><div dir="ltr" id="yui_3_16_0_1_1430509333846_15758"><span id="yui_3_16_0_1_1430509333846_16091">Although lighter for the same strength you would need to go twice as thick (guess).</span></div><div dir="ltr" id="yui_3_16_0_1_1430509333846_15758"><span id="yui_3_16_0_1_1430509333846_16282">You may find someone in the world that can spin a large thick aluminum hemisphere.</span></div><div dir="ltr" id="yui_3_16_0_1_1430509333846_15758"><span id="yui_3_16_0_1_1430509333846_16461">If you do, it then may be a matter of comparing the price of aluminium versus metal &</span></div><div dir="ltr" id="yui_3_16_0_1_1430509333846_15758"><span>syntactic foam. With the syntactic foam option you could end up with better stability.</span></div><div dir="ltr" id="yui_3_16_0_1_1430509333846_15758"><span>Alan</span></div><div dir="ltr" id="yui_3_16_0_1_1430509333846_15758"><span><br></span></div><div dir="ltr" id="yui_3_16_0_1_1430509333846_15758"><span><br></span></div><div dir="ltr" id="yui_3_16_0_1_1430509333846_15758"><span><br></span></div><br> <div style="font-family: HelveticaNeue, Helvetica Neue, Helvetica, Arial, Lucida Grande, sans-serif; font-size: 16px;" id="yui_3_16_0_1_1430509333846_15814"> <div style="font-family: HelveticaNeue, Helvetica Neue, Helvetica, Arial, Lucida Grande, sans-serif; font-size: 16px;" id="yui_3_16_0_1_1430509333846_15813"> <div dir="ltr" id="yui_3_16_0_1_1430509333846_15820"> <hr size="1" id="yui_3_16_0_1_1430509333846_15842"> <font size="2" face="Arial" id="yui_3_16_0_1_1430509333846_15819"> <b><span style="font-weight:bold;">From:</span></b> via Personal_Submersibles <personal_submersibles@psubs.org><br> <b><span style="font-weight: bold;">To:</span></b> Personal Submersibles General Discussion <personal_submersibles@psubs.org> <br> <b><span style="font-weight: bold;">Sent:</span></b> Saturday, May 2, 2015 6:43 AM<br> <b><span style="font-weight: bold;">Subject:</span></b> Re: [PSUBS-MAILIST] exotic steel<br> </font> </div> <div class="y_msg_container" id="yui_3_16_0_1_1430509333846_15812"><br><div id="yiv1537149099"><div id="yui_3_16_0_1_1430509333846_15811"><span style="font-family:Verdana;color:#000000;font-size:10pt;" id="yui_3_16_0_1_1430509333846_15810"><div id="yui_3_16_0_1_1430509333846_15818">Cool. So what are the drawbacks of aluminum? Why don't most deep divers use it?</div>
<div id="yui_3_16_0_1_1430509333846_16203"> </div>
<div id="yui_3_16_0_1_1430509333846_15817">Thanks,<br>Scott Waters </div>
<div id="yui_3_16_0_1_1430509333846_16202"> </div>
<blockquote id="yiv1537149099replyBlockquote" style="FONT-SIZE:10pt;FONT-FAMILY:verdana;COLOR:black;PADDING-LEFT:8px;MARGIN-LEFT:8px;BORDER-LEFT:blue 2px solid;">
<div id="yiv1537149099wmQuoteWrapper">-------- Original Message --------<br>Subject: Re: [PSUBS-MAILIST] exotic steel<br>From: Jon Wallace via Personal_Submersibles<br><<a rel="nofollow" ymailto="mailto:personal_submersibles@psubs.org" target="_blank" href="mailto:personal_submersibles@psubs.org" id="yui_3_16_0_1_1430509333846_15816">personal_submersibles@psubs.org</a>><br>Date: Fri, May 01, 2015 11:31 am<br>To: Personal Submersibles General Discussion<br><<a rel="nofollow" ymailto="mailto:personal_submersibles@psubs.org" target="_blank" href="mailto:personal_submersibles@psubs.org" id="yui_3_16_0_1_1430509333846_15815">personal_submersibles@psubs.org</a>><br><br>
<div class="yiv1537149099moz-cite-prefix" id="yui_3_16_0_1_1430509333846_15809"><br>I'm showing 1 inch thick for Aluminum 7079-T6 to reach 3000 feet at a usage factor of .8<br>I believe that equates to around 1,850 pounds with about 1,800 pounds of payload. If you use ABS recommended .67 usage factor you have to bump up to 1-1/8 inch thickness.<br><br>Jon<br><br><br>On 5/1/2015 1:47 PM, via Personal_Submersibles wrote:<br></div>
<blockquote type="cite"><span style="FONT-SIZE:10pt;FONT-FAMILY:Verdana;COLOR:#000000;">
<div>I know there was the aluminaut that was made of aluminum. What is the possibility of using aluminum instead of HY-100? I essentially know nothing about it. </div>
<div> </div>
<div>Thanks,<br>Scott Waters</div></span><br>
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