Some tests of light aluminium casting alloys--The effect of heat treatment .. . bronze; the dimensions of the bar usedin these experiments do not correspond exactly to those of thisspecification, however. The bar may be machined for use withwedge grips or with threaded holders; in these experiments all barscast into this form were tested with wedge grips. Forms /// andVII are ordinary types of test bars from which a standard testspecimen of inch diameter may be obtained to be tested withwedge grips. The No. IV is given in the tables to a bar cast to thesame dimensions as No. Ill, but mac
Some tests of light aluminium casting alloys--The effect of heat treatment .. . bronze; the dimensions of the bar usedin these experiments do not correspond exactly to those of thisspecification, however. The bar may be machined for use withwedge grips or with threaded holders; in these experiments all barscast into this form were tested with wedge grips. Forms /// andVII are ordinary types of test bars from which a standard testspecimen of inch diameter may be obtained to be tested withwedge grips. The No. IV is given in the tables to a bar cast to thesame dimensions as No. Ill, but machined vv^ith threaded V and VI are of the shoulder type, and are machined to diameter. Bars ///, IV, V, VI, and VII were cast in pairs,horizontally, in green sand, with gate and riser for each pair. The test results show that No. I gives very low values of thetensile strength, owing to the large section of the cast piece. Thistype is not satisfactory for aluminmn alloys. In all of the tests Technologic Papers of the Bureau of Standards P-iV-i—ft—rii-n.
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