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There is such a thing as over categorisation, just keep it in mind. Plasmic Physics (talk) 11:51, 23 May 2013 (UTC)[reply]
Maybe you could have a metallurgist, or even a decent student, explain to you why the silicon series of the aluminium alloys (like the Duralumin copper series, or the nickel series) is a significant group within the broader Al alloys. Andy Dingley (talk) 11:55, 23 May 2013 (UTC)[reply]
Whether or not it is a significantly important group does not contribute to the argument for or against the creation of a category. Plasmic Physics (talk) 11:57, 23 May 2013 (UTC)[reply]
