Title (almost) says it all.
1141 Hot Rolled Bar - a medium carbon, special quality, manganese steel with improved machinability and better heat treatment response. Surface hardness is deeper and more uniform than plain carbon steels.

Properties
Tensile Strength: 108,000 psi
Yield Strength: 90,000 psi
Elongation in 2": 10%
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20.85 lbs