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Duralumin, its properties and uses (1924)
NASA Technical Reports Server (NTRS) · leaf 20
N.A.C.A- Technical Memorandum No. 284 Fig. 2 … 024 19 24 48 72 96 120 hours Seasoning period Fig. 2 Effect of seasoning. Brinell hardness. Alloy con- taining 4,5 fo Cu and 0.57 Mg. Effect of seasoning period on hardness of tempered duralumin.NASA Technical Reports Server (NTRS)
Internet Archive · NASA Technical Reports · Public domain (US government work). Free to use for anything.
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