$($a$)$ Calculate the surface factor $k_a$ and temperature factor $k_d$ for a $1\mathrm{.}5-$in diameter AISI $1060$ HR

steel rod that will be used at an elevated temperature of $600F.$

Note: You should recognize what unit system to use from the problem statement.

$k_a=$

$k_d=$

$($b$)$ If the rod in $3($a$)$ does not rotate but is subject combined bending and torsional loads,

calculate the size factor $k_b$ and load factor $k_c.$

$k_b=$

$k_c=$