needed. (Assume the steel alloy is composed of FCC iron.) \begin{tabular}{|c|c|c|c|c|c|} \hlinez & erf(z) & z & erf(z) & z & erf (z) \\ \hline 0 & 0 & 0.55 & 0.5633 & 1.3 & 0.9340 \\ \hline 0.025 & 0.0282 & 0.60 & 0.6039 & 1.4 & 0.9523 \\ \hline 0.05 & 0.0564 & 0.65 & 0.6420 & 1.5 & 0.9661 \\ \hline 0.10 & 0.1125 & 0.70 & 0.6778 & 1.6 & 0.9763 \\ \hline 0.15 & 0.1680 & 0.75 & 0.7112 & 1.7 & 0.9838 \\ \hline 0.20 & 0.2227 & 0.80 & 0.7421 & 1.8 & 0.9891 \\ \hline 0.25 & 0.2763 & 0.85 & 0.7707 & 1.9 & 0.9928 \\ \hline 0.30 & 0.3286 & 0.90 & 0.7969 & 2.0 & 0.9953 \\ \hline 0.35 & 0.3794 & 0.95 & 0.8209 & 2.2 & 0.9981 \\ \hline 0.40 & 0.4284 & 1.0 & 0.8427 & 2.4 & 0.9993 \\ \hline 0.45 & 0.4755 & 1.1 & 0.8802 & 2.6 & 0.9998 \\ \hline 0.50 & 0.5205 & 1.2 & 0.9103 & 2.8 & 0.9999 \\ \hline \end{tabular}