<p dir="ltr">I wouldn't consider using anything less thenĀ 516 gr 70 when building a pressure hull . Also make sure you ask for the paper work to go with it with the proper heat numbers stamped on all the hull sections. I would also follow up by sending a coupon from each piece to an independent lab for verification .<br>
Dan Lance</p>
<div class="gmail_quote">On Jun 13, 2014 9:15 AM, "Daniel Lance" <<a href="mailto:lanceind@gmail.com">lanceind@gmail.com</a>> wrote:<br type="attribution"><blockquote class="gmail_quote" style="margin:0 0 0 .8ex;border-left:1px #ccc solid;padding-left:1ex">
<p dir="ltr">36 " in diameter . The original K250 plans specified A36 . In the 1960s or 1970s that was acceptable when steel was domestically produced. Most A36 is imported today and of questionable quality . </p>
<div class="gmail_quote">On Jun 13, 2014 8:37 AM, "swaters via Personal_Submersibles" <<a href="mailto:personal_submersibles@psubs.org" target="_blank">personal_submersibles@psubs.org</a>> wrote:<br type="attribution">
<blockquote class="gmail_quote" style="margin:0 0 0 .8ex;border-left:1px #ccc solid;padding-left:1ex">
<div><div>The K-250 hull is 4 foot long and 30" OD out of 1/4" ASME 516 gr70 correct?</div><div>Thanks,</div><div>Scott Waters</div><div><br></div><div><br></div><div><br></div><div><br></div><div><div style="font-size:75%;color:#575757">
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