Civil Engineering Structure Discussion Area ---- [Daily Question] Question from the 20151213 issue
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True or False: After cold drawing, steel bars can have both their tensile strength and their compressive strength increased. ( ) Answer: Wrong
After cold drawing, steel bars can have their tensile strength increased, as well as their compressive strength. ( Wrong )
After cold drawing, steel bars can have their tensile strength increased, as well as their compressive strength. (X)
After cold drawing, steel bars can have their tensile strength increased, as well as their compressive strength. (×)
After cold drawing, steel bars can have their tensile strength increased, as well as their compressive strength. Wrong
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After cold drawing, steel bars can have their tensile strength increased, as well as their compressive strength. ( X )
Cold drawing simply applies tension to the rebar; no pressure is involved, so it cannot increase the compressive strength of the rebar. Cold drawing can increase the yield strength and save materials – hot-rolled rebar is stretched using cold drawing equipment, and after the cold drawing process it elongates. After cold drawing, the yield strength can be increased by 20%-25%, and steel can be saved by 10%-20%
After cold drawing, steel bars can have their tensile strength increased, as well as their compressive strength. ( Wrong )