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Aviation History
1938
1938 - 0712.PDF
FLIGHT. ADVT. ADVERTISEMENTS. MARCH 17, 1938. ^-— A new aluminium alloy which simplifies construction # NA. 26 S is a new high strength aluminium alloy possessing a combination of higher mechanical pro- perties and greater ease of workability, together with better forging characteristics than have hitherto been obtainable. In the partially heat treated condition in which sheets are normally supplied, this alloy has exceptional forming properties, which generally obviate solution heat treatment, or normalising, prior to working. The surface finish in extruded form is particularly good and corrosion tests prove NA. 26 S superior to all other double heat-treated alloys in the high strength group. This new aluminium alloy is supplied as sheet and strip in the "Alclad " and uncoated forms, bars, extruded sections and forgings. MECHANICAL PROPERTIES REQUIRED BY SPECIFICATfON I % proof stress tons/sq. ins. - - - Ultimate Tensile Strength tons/sq. ins. Elongation % on 2 ins. - - - - - •Alclad ' DTD 351 19.0 25.0 8 ShMt Uncoated DTD 356 21.0 27.0 8 Extrusions DTD 364* 26 30 8 •Proposed For further information on this new Alloy please consult our Advisory Service. NORTHERN ALUMINIUM^./// BUSH HOUSE, ALDWYCH, LONDON, W.C.2 Telephone; TEMPLE BAR 8844 Telegrams : NORALUCO, BUSH, LONDON and at BANBURY, BIRMINGHAM, BRISTOL, COVENTRY, GLASGOW, MANCHESTER, NEWCASTLE.ON-TYNE & SHEFFIELD
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