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design considerations for aluminum hull structures - Ship Structure ...

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-13-FOOTNOTES(Part A - Pages 9-11)Mechanical test specimens are taken as detailed under T%mpling and Testing~l,pages 52-54 of Reference (l).Type of test specimen used depends on thickness of material; see L%mplingand Testingll, pages 52-54 of Reference (1).For the correspofiing H2 temper, limits <strong>for</strong> maximum ultimate tensile strengthand rninim”umyield strength do not apply.This material is subject to some rec~stallization and the attendant lossof brightness.D represents specimen diameter.These yield strengths not determined unless specifically requested.(Part B - Page 12)These typical properties are average <strong>for</strong> variousof manufacture, afi may not exactly describe any<strong>for</strong>ms, sizes and methodsone particular product.Based on$OO,OOO,OOO cycles of completely reversed stress using the R.R.Wore type of machine and spec~en.Average of tension and compression moduli. Compression modulus is about2% greater than tension modulus.

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