tag:blogger.com,1999:blog-7888330661336378675.post2513359757558182036..comments2023-11-30T00:17:35.282-08:00Comments on The Screw Files: What you don't know won't affect you?The Screw Fileshttp://www.blogger.com/profile/08877313446124772198noreply@blogger.comBlogger2125tag:blogger.com,1999:blog-7888330661336378675.post-12130998543635017442013-02-07T17:24:09.614-08:002013-02-07T17:24:09.614-08:00Thanks Peter - you raise some interesting points.
...Thanks Peter - you raise some interesting points.<br />We typically specify a minimum yield strength of 350 MPa - Suppliers often then provide X52 to deliver this.<br />ERW is used the world over for screw piling. We have not heard of or witnessed any issues around the heat affected zone(HAZ)before. The key is the continuity of the seam to ensure structural integrity.The Screw Fileshttps://www.blogger.com/profile/08877313446124772198noreply@blogger.comtag:blogger.com,1999:blog-7888330661336378675.post-54335264652015981852013-01-31T01:17:02.124-08:002013-01-31T01:17:02.124-08:00What a great idea, I am always fascinated by the i...What a great idea, I am always fascinated by the inner workings of things like this. Do you use API 5L X52 PSL 2 or API 5L X65 PSL 2? I am surprised that you use ERW as I tend to think the HAZ might struggle to cope with the loadings. Seamless might be safer. AS/NZS 3404.1 I believe defers to AS/NZS 1554.1-7in relation to grades and strengths of materials. 1554.1 allows welding up to 500 MPa. <br />For higher strength materials e.g. ASTM A514, with a yield strength of 690 MPa, weld procedures are developed from AS/NZS 1554.4 Welding of high strength quenched and tempered steels.<br />Elongation Value I know nothing about. But wall thickness should be able to be reduced as yield strength increases. <br />It is an interesting subject and I look forward to reading more about this ‘black art.’<br />Cheers, Peter Lochead<br />Peterhttps://www.blogger.com/profile/04430820162807570850noreply@blogger.com