Differences in chemical composition between SA516 Gr65 (R-HIC) and SA516 Gr65 (HIC) steel plates

SA516 Gr65 (R-HIC) and 516 Gr65 (HIC) steel plates are hydrogen sulfide corrosion resistant steel plates and shall comply with ASME standards.

Chemical composition of SA516 Gr65 (R-HIC) steel plate
C≤0.26; Si: 0.15-0.4; Mn: 0.85-1.2; P≤0.015; S≤0.003 ; Ni≤0.3; Cr≤0.3 M; ≤0.08; Cu≤0.3; Alt≥0.02; Ceq ax≤0.43.
Composition remarks: Cr Ni Mo Cu ≤ 0.7; V Ti Nb≤0.05; Alt can be replaced by Als, where Als ≥ 0.015; If trace elements such as V, Ti and Nb are added to the steel, the lower limit of Al content is not applicable. Ceq = C Mn/6 (Cr Mo V)/5 (Ni Cu)/15

Chemical composition of SA516 Gr65 (HIC) steel plate
C ≤0.29; Mn: 0.85-1.2; P≤0.035; S≤0.035; Si: 0.15-0.4.
Note: The actual situation shall prevail