set preamble "\usepackage{amsmath}"

set width 14*unit(cm)

set axis x arrow nomirrored
set axis y arrow nomirrored
set key bottom left

#set xrange [0:1]
#set yrange [1:1e20]

set grid

set terminal pdf

set output "SN.pdf"
set key top right
set xlabel "Number of cycles $N$"
set ylabel "Stress amplitude $S_a$ [MPa]"
set logscale x 10
set logscale y 10
set yrange [10:1e4]
set xrange [10:1e11]

plot "SN.dat"   u 1:2 w lp pt 2 lw 2 lt 2 color black ti "SA~106~GrB ($E=207$~MPa)",\
     "SN.dat"   u 1:3 w lp pt 3 lw 3 lt 3 color blue  ti "SA~312~TP~304L, ($E=195$~MPa)"