<html><head><meta http-equiv="Content-Type" content="text/html; charset=UTF-8"></head><body ><div>I have been trying to figure out what grade of steel it is. I figured it was titanium, but when I watched the documentary, they kept saying it was steel. My bust guess is it is HY-100?</div><div>Merry Christmas,</div><div>Scott Waters</div><div><br></div><div><br></div><div><div style="font-size:9px;color:#575757">Sent from my U.S. Cellular® Smartphone</div></div><div></div><br><br>-------- Original message --------<br>From: via Personal_Submersibles <personal_submersibles@psubs.org> <br>Date:12/25/2014 6:32 AM (GMT-07:00) <br>To: personal_submersibles@psubs.org <br>Subject: Re: [PSUBS-MAILIST] Deep Sea Challenger <br><br><font id="role_document" color="#000000" size="2" face="Arial">
<div>Merry Christmas, Scott,</div>
<div> </div>
<div>The 43" sphere is steel 2.5" thick. I don't think they have
released any information on what grade steel was used. They said a
cylinder would have had to be three times as thick to withstand the pressure,
but I don't know if that was based on 43". -Jim T.</div>
<div><img style="MAX-WIDTH: 1059px; MAX-HEIGHT: 420px" src="http://upload.wikimedia.org/wikipedia/commons/thumb/5/56/Deepsea_Challenger_Pilot_Sphere.jpg/640px-Deepsea_Challenger_Pilot_Sphere.jpg" width="338" crossorigin="anonymous"></div>
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<div>In a message dated 12/25/2014 12:27:52 A.M. Central Standard Time,
personal_submersibles@psubs.org writes:</div>
<blockquote style="PADDING-LEFT: 5px; MARGIN-LEFT: 5px; BORDER-LEFT: blue 2px solid"><font style="BACKGROUND-COLOR: transparent" color="#000000" size="2" face="Arial">
<div>What kind of metal is the personel sphere made of on James Camerons deep
sea challenger sub?</div>
<div>Thanks,</div>
<div>Scott Waters</div>
<div><br></div>
<div>
<div style="FONT-SIZE: 9px; COLOR: #575757">Sent from my U.S. Cellular®
Smartphone</div></div>
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