Talk:Hardnesses of the elements (data page)

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This page is intended as an authoritative data collection with citation of sources, that may be cited as a central reference by other articles (such as for the chemical elements). Femto 11:22, 20 Apr 2005 (UTC)

United States of Hardness[edit]

The three tables should be united into one, with side-by-side Vickers, Brinell, Rockwell and megapascal values. 82.131.210.162 (talk) 10:47, 16 June 2008 (UTC)

Yes, done. Values should be taken as very approximate. I personally do not trust them. Materialscientist (talk) 07:43, 28 September 2009 (UTC)

Hardness of Gold[edit]

The Brinell Hardness of gold seems to high. The stated Brinell value fpr gold is about 5 times that of iron, and about the same as for tungsten. I find this extremely difficult to believe. —Preceding unsigned comment added by 83.209.73.77 (talk) 11:25, 27 May 2009 (UTC)

A misprint corrected. Materialscientist (talk) 07:43, 28 September 2009 (UTC)

Hardness of Cryo-solids[edit]

I'm not an expert but aren't hardness measurements non-dependent of temperature? I don't know how useful or practical it would be but perhaps we could include more than just the elements that are solid at or near room temperature. That is, if anybody has bothered to measure them. 65.80.178.227 (talk) 05:30, 28 September 2009 (UTC)

Hardness is temperature dependent, but is conventionally measured at ambient conditions. Spreading the temperature range would bring too much details (phase transitions, etc.), which are of little use to non-specialists. Materialscientist (talk) 05:34, 28 September 2009 (UTC)

HI,

WHY THREE TYPES OF HARDNESS REQUIRED (VICKERS,BRINELL,ROCKWELL) & WHICH IS BETTER?

DEEPAK —Preceding unsigned comment added by 112.110.7.240 (talk) 06:08, 21 March 2010 (UTC)

Please don't write in capitals. There are different ways to test hardness and they have they own specificities. Materialscientist (talk) 06:15, 21 March 2010 (UTC)

The third column is completely wrong[edit]

That third column dataset seems to be based on bad data that's been put out by Wolfram, since the same table is on Wolfram alpha and copied around the web. Lead is not harder than tin and silver. This is pretty basic stuff. The 4th column seems more accurate. Even worse, all the articles on the elements seem to use this bad data in their infoboxes. What a mess. Gigs (talk) 20:09, 11 May 2012 (UTC)

I know the problem, but can't find a consistent replacement set. Hardness depends on pretreatment (see ref. 2) and form (say, iron). Thus I came out with set 4 and changed some infobox values accordingly (tin - now, some others before, but not all, as there is some rough agreement between sets 3 and 4). Any help is welcome, especially with finding a dataset. Materialscientist (talk) 00:09, 12 May 2012 (UTC)

Comparison with other Wiki pages[edit]

I'm struggling to see how the values here compare to the other values in wikipedia.

e.g, http://en.wikipedia.org/wiki/Hardness_comparison has all integer values for hardness, ranging from a minimum of 80ish. There are no SI units listed on this page (that I could work out), so perhaps a little note indicating the conversion? (I know very little materials science, so maybe I'm just showing my ignorance, if so, please suggest some reading for me) — Preceding unsigned comment added by 203.219.253.46 (talk) 04:36, 26 May 2012 (UTC)

Hardnesses of Phosphorus allotropes are missing. --Anoop Manakkalath (talk) 04:46, 17 January 2013 (UTC)

Is this a joke?[edit]

one ref listed for this chart is a book dated from 1968. A lot of updated info is now available . As for webelements.com, I don't see how this could be considered as a valid source, it's a private webpage owned by Mark Winter, and even though he is a university professor, he did not measure personally the values he presents on his webpage nor did he participate in the tests to find the said hardness values, by the way this site is only a project and many values are missing. Better rely on recent materials handbooks than such websites. — Preceding unsigned comment added by 82.240.163.245 (talk) 05:34, 30 September 2014 (UTC)

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