Essentials of drafting; a text and problem book for apprentice, trade and evening technical schools (1918)
Svensen, Carl L. (Carl Lars), 1884- · New York, D. Van Nostrand company · leaf 49
Fig. 73 Fig. 74 rigidity and weight are required. Cast iron cannot be weldedand has very little elasticity, so that it is not adapted for usewhere shocks and sudden loads are to be cared for. Cast iron has a crystalline structure, and when cooling thecrystals form at right angles to the surface.… … Fig. 75 73, in which fracture is likely to occur along a6, called the plane offracture. This may be prevented by rounding, as in Fig. 74.Cast iron expands at the moment of solidifying, but shrinks uponcooling. This action sets up cooling strains in the casting, espe-cially if there exists a…
Mechanical drawing
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