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SA-387 Grade C

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jwshome

jwshome

Industrial
Joined
Jul 18, 2003
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I am evaluating a vessel constructed in 1974. The manufacturer's data report and construction drawing indicate that the shell cans are SA-387-C. Is this equivalent to SA-387 Gr.11? I have searched USC-23 in the 1975 ASME Section VIII and do not find Grade C.
 
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Yes, SA-387 is a Cr-Mo steel plate specification. The edition I have shows five Grades A-E. Grade C is listed as 1-1.5% Cr, 0.45-0.65% Mo, so it would be equivalent to Grade 11.
 
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