Talk:Cold rolling

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so how come after the metalhas been cold worked to a certain stage does the hardness start to decrease?

It doesn't, really, though it becomes more brittle as it is repeated cold-rolled due to strain hardening. Additionally, all metals anneal over time slowly, the rate is simply much slower at lower temperatures-- perhaps this is what you are thinking of? siafu 14:01, 24 April 2007 (UTC)

[edit] Logic error in article

"Quarter hard metal can be bent entirely back on itself, while full hard can only be bent 45°.[1]"

Given a long enough piece of full hard metal, I can bend it more than 45°. - This above sentence probably speaks of the relation in which equally long pieces of quarter-hard and full-hard stand to each other, but still it would be quite topical to point out approximately how long these pieces are for a given material.--Ceriel Nosforit 17:22, 14 July 2007 (UTC)

This statement is very specific to an alloy, it has no real value to the article other than to qualitatively illustrate that cold work makes a metal harder. I have removed it, but have replaced the content with information presented in a more acceptable fashion.Iepeulas 03:19, 7 August 2007 (UTC)