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 50
ded. MATERIALS AND STRESSES 33 Cast iron is about four times as strong in compression as it is intension. Wrought Iron. — Wrought iron is almost pure iron, obtainedby melting pig iron and squeezing out the impurities while it isin a plastic state. For such purposes a puddling furnace (Fig.75) is… … U/\JDER PRESSUftt Fig. 76 continued until most of the impurities are burned or squeezedout. It is then rolled into bars or billets. These billets arefurther rolled into rods of various shapes and sizes called merchantbars. This rolling process gives the iron a fibrous structure dueto a certain…
Mechanical drawing
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