Test pieces cut longitudinally to direction of rolling

Discussion of Fig. 40 (test pieces cut longitudinally to direction of rolling). 

Tensile Strength. This property decreases to a minimum at 15-20 % cold work, and then slowly increases. 

Elastic Limit. This increases and, after 20 % cold work, is nearly equal to the Tensile Strength. 

Elongation. This decreases very rapidly, falling from 18 % to 4 % as the cold work increases from 18 % to 20 %. The value remains constant from 20 % to 40 % cold work, and finally, at 50 % cold work, becomes extremely small (less than 1 %)  

Shock Resistance. This falls from 3 kg. m. per sq. cm. to less than 1 kg. m. per sq. cm., while the cold work changes from 0 to 50 % 

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