Concrete Technology and Design of Concrete Structures
High carbon content in the steel causes

increase in both tensile strength and ductility
decrease in tensile strength but increase in ductility
increase in tensile strength but decrease in ductility
decrease in both tensile strength and ductility

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Concrete Technology and Design of Concrete Structures
Stress strain curve of high tensile steel

has a definite yield point
does not show definite yield point but yield point is defined by 2% proof stress,
does not show definite yield point but yield point is defined by 0.1% proof stress
does not show definite yield point but yield point is defined by 0.2% proof stress

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