For a cylindrical S$-590$ specimen originally $11$ mm in diameter and $523$ mm long, what tensile load $($in N $)$

is necessary to produce a total elongation of $2\mathrm{.}9$ mm after $1100$ hours at $815C?$ Assume that the sum

of instantaneous and primary creep elongations is $0\mathrm{.}84$ mm $.$ Use the Animated Figure above, "Stress

$($logarithmic scale$)$ versus steady$-$state creep rate $($logarithmic scale$)$ for an S$-590$ alloy at four

temperatures."

$10$