Dale,
A CMTR I just received for EH36 (A633 Gr C) lists C= 0.14, Mn= 1.37,
P= 0.007, S= 0.001, Cu= 0.12, Si= 0.27, Ni= 0.09, Cr= 0.10, Mo= 0.02, V= 0.001, Ti= 0.003, B= 0.0003, Al= 0.030, Cb= 0.028, N= 0.0072
Yield= 53.9k, Tensile= 76.6k, % Elong. in 2"=32.0,
CVN @-40F is 140,150,170. My understanding is the CVN @ -40F is what was required by the EH36 designation. (This is stuff you might be seeing in Portland.)
CHGuilford