Talk:Unified numbering system

message: Although previous edits reflecting this were made by a corporate account, UNS C95400 is definitely not equivalent to Ampco 18. Compare UNS C95400 data sheet with Ampco 18 data sheet  to see the differences. The website of Western States Metals used as reference was wrong and no longer mentions Ampco 18, compare the current version with an archived version or Google cache (as of Oct 16). Therefore, I removed the incorrect sentence from this article. 83.228.186.82 11:15, 16 October 2007 (UTC)
replies: text: A UNS number only identifies a range of chemical compositions, and establishes no requirements for material properties, heat treatment, form, or quality. That is why a UNS, in itself, is not a material specification. The sources you just provided confirm that Ampco 18 is indeed a proprietary material specification for UNS C95400. More importantly, this is explicitly stated by the UNS index jointly published by the SAE and ASTM, which I will soon add as a reference to this article. The identity of Ampco 18 as UNS C95400 is even advertised in old Ampco pamphlets which I still have.--Yannick 23:30, 22 October 2007 (UTC)
replies: text: And actually Ampco 18 isn't even a proper material specification, because it only offers nominal values without tolerances rather than minimum requirements. So a given product could meet the material properties given by Matweb for C95400 and still be called Ampco 18 by an unscrupulous manufacturer.--Yannick 23:40, 22 October 2007 (UTC)

text:  It should be made very clear that Ampco 18 does indeed meet or exceed the properties of C95400 (CDA954) but, (as many have found to their cost), C95400 falls far short of the superior properties of Ampco 18.  —Preceding unsigned comment added by Bronzeman53 (talk • contribs) 13:29, 29 October 2007 (UTC)
replies: text: Bronzeman53's statement does not make sense. By definition, a UNS number does not establish material properties; for example, tempering can make a very large difference. C95400 defines an alloy, a range of material compositions, which Ampco 18 meets. So Ampco 18 is an example of a C95400 alloy which nominally meets the properties of Ampco 18. (Without guarantees, since Ampco only offers nominal properties.)--Yannick 00:46, 30 October 2007 (UTC)
replies: text: I see a logical flaw in the statement "UNS C95400 is Ampco 18". If Ampco 18 is an example (or "subset") of C95400 alloys, i.e. there are other C95400 alloys that are not Ampco 18, shouldn't the statement be "Ampco 18 is UNS C95400"? Like in "A sparrow is a bird" and not "A bird is a sparrow"? And the same would apply to all other examples in the article. In my opinion, the order should be reversed to avoid this problem. 84.74.225.9 01:18, 31 October 2007 (UTC)

text: It is a very slow edit war. But I'm pretty sure I'm only arguing against a single person who probably works for Ampco Metals company, and who has no real interest in improving Wikipedia. User:Ampcometal, who initiated this war, tried to scare me off by emailing me a legal threat about this issue in October. I'm not ready to give in to a herd of sockpuppets with a conflict of interest. It's just a bad precedent to give in to a corporate interest just because they're insistent. If Ampco wins, it won't stop there. Carpenter Steel will start complaining that UNS 17400 is not Custom 630, and so on. I wrote a true and relevant statement and attributed it to a reliable published source. That should be enough to justify keeping it.--Yannick (talk) 02:51, 5 March 2008 (UTC)

text: No personal attacks, please. If you want to win your point, I'm still willing to read your explanation of the differences between UNS C95400 and Ampco 18. But if you don't like to engage in these pedantic discussions, you may want to reconsider whether you want to participate in writing an encyclopedia.--Yannick (talk) 02:13, 7 March 2008 (UTC)
replies: text: I'm removing the example as this seems to be going nowhere. I have my opinions about the matter, but I don't want to feed the fire anymore than it already is. Either way, we can't go on having an edit war. --Wizard191 (talk) 02:39, 7 March 2008 (UTC)
replies: text: I'm content to leave the article alone while we discuss it. I'm still waiting for someone to counter the arguments I made on November 2nd, 2007, above. But if the discussion does not progress, then my statement should be restored simply because it was true, relevant, and attributed to a reliable published source.--Yannick (talk) 18:07, 8 March 2008 (UTC)
thread_title:  UNS C95400 (CDA 954) is not equivalent to Ampco 18 

message: I am responding to a third opinion request which was listed more than one week ago and drew no responses from third opinion volunteers during the past ten days.  
Has this dispute been resolved, or not?  I'll watchlist this page until the question has been clarified, so please respond here.  Thanks.  — Athaenara  ✉  02:00, 16 March 2008 (UTC)
thread_title: Third opinion