Talk:Compacted graphite iron

Properties description
The sentence "This results in stronger adhesion between the graphite and the iron giving a material with greater tensile strength" is dubious (sounds like a conclusion of original research). There is a reference source with it; I checked out this source and the web article does not state this. This needs to be reworded. Mfields1 (talk) 09:40, 8 June 2009 (UTC)
 * OK< in the Dawson article he states "adhesion" but the iron matrix and graphite are not meant to 'adhere' to one another in the sense of strength. The states later that regarding the difference in the graphite morphology is less of a crack initiator compared to cast irons.  Designers like compacted graphite because it exhibits thermal diffusivity and vibration damping characteristics similar to gray iron but will attain some elongation and higher tensile strengths similar to ductile iron.  Mfields1 (talk) 09:46, 8 June 2009 (UTC)
 * I just reworded that text from somewhere else. I'm neither a metallurgist or even a scientist, just a car nut that thought that CGI deserves a page.  If you know more than me, in other words if you know anything at all, be my guest and edit it. Thanks dieselnutjob  —Preceding undated comment added 12:10, 30 June 2009 (UTC).

Removed missing link
There is a page missing for the reference. No citation now for the claim of first commercial use.
 * I've repaired the link. For future reference, do not delete dead link, instead tag them with dead link. For more information, please see Dead external links. Wizard191 (talk) 00:18, 14 June 2009 (UTC)
 * The link is dead. I have tried it repeatedly.  Mfields1 (talk) 21:45, 14 June 2009 (UTC)
 * I just tried it this morning and it works. See my screenshot: Wizard191 (talk) 00:17, 16 June 2009 (UTC) Cgi source screenshot.jpg
 * I just tried it and it is now working. Mfields1 (talk) 23:24, 15 June 2009 (UTC)

Differing names
Is this the same as 'vermicular graphite cast iron' (GJV), as detailed here? Kind regards. 78.32.143.113 (talk) 12:21, 14 January 2010 (UTC)
 * Yup, it's the same thing. See the new reference I've added for more details. Wizard191 (talk) 14:33, 14 January 2010 (UTC)
 * Many thanks for your prompt response, much appreciated. 78.32.143.113 (talk) 10:16, 15 January 2010 (UTC)

One other question - what do the initials 'GJV' stand for? I'd start with guessing something like "graphite --- vermicular" - but the middle 'J' has thrown me. Regards again. 78.32.143.113 (talk) 17:42, 18 January 2010 (UTC)
 * I've done a lot of searching but haven't come up with anything. Wizard191 (talk) 18:53, 18 January 2010 (UTC)
 * I'm guessing GJV might be a German acronym - some searching comes up with Gusseisen mit Vermiculargraphit from a related German Wapedia site here - still don't see the J anywhere though! It goes on to state that CGI is the English translation.  So this might explain why all the German engine literature uses the GJV rather than CGI acronym!  78.32.143.113 (talk) 21:15, 18 January 2010 (UTC)


 * Actually GGV is the German acronym, which makes perfect sense from Gusseisen mit Vermiculargraphit. GJV is the ISO designated acronym. CGI comes from Compacted graphite iron, which is the common English term. Wizard191 (talk) 21:41, 18 January 2010 (UTC)
 * It would seem the Germans have a number of 'official' acronyms - this very highly regarded automotive engineering publication - ATZ lists GGV, CGI, GJV, and JV - but their acronym of 'preference' seems to be GJV. I'm still searching for that 'lost' J though!!!  Kind regards, 78.32.143.113 (talk) 21:51, 18 January 2010 (UTC)
 * I referenced that website in the article, however I wouldn't say that those are "official German acronyms", just various acronyms listed by the website author. Wizard191 (talk) 22:07, 18 January 2010 (UTC)
 * Yeah, I realised that after I commented on this talk page! Anyway, found another interesting publication - is this PDF worthy of inclusion as a citation?  It has some examples of diesel engines from differing car makers.  78.32.143.113 (talk) 22:14, 18 January 2010 (UTC)
 * I think it is worthy of inclusion Dieselnutjob (talk) —Preceding undated comment added 15:16, 19 October 2010 (UTC).

History
I'm no metallurgist by any means. There is much information to be added in all categories but the basic history is the basis to any research. I read that it has been used since the 1990's. Rudolph Sillen patented a process to produce it commercially in December of 2006. — Preceding unsigned comment added by 24.191.225.171 (talk) 03:13, 7 May 2014 (UTC)