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Thanks. We will do some tests in house...weld some on and bash them around, see if we have any failures. I was just curious if welding turns B7 to glass, etc. [nosmiley]

It is welded with a simple 1/4-3/8" fillet. Going forward we won't be using it. We are trying to assess the viability/necessity of reworking scores of units scattered over the globe.

We recently discovered a supplier had substituted B7 studs in place of the SA36 we ordered. (a no charge "upgrade") Some of these B7 studs got welded to SA516-70 plate as a lifting device (GMAW ER70S-6). I know that ASME does not recognize B7 as a weldable material, but this is not an ASME Code...

Ah ha! Said the blind man. SA-387 Gr 9 is not recognized by Sect 8, Div. 1 as pressure vessel material per Table UCS-23. Thanks for your help guys. I'll buy new shells and heads and then likely have some questions about welding and stress relieving Gr 9 to Gr 91 joints.

Thanks. I see that one, but my MTR's are for SA-387 Gr 9 Cl 2.

Well, I seem to be back to where I started. Back in section II part D, Table 1A. 9Cr-1Mo isn't shown in plate form. What am I missing?

Thanks Metengr! I knew the stresses must be there. It didn't make any sense to me. We'll keep looking.

We are fabricating ASME Code pressure vessels specified to be 9 chrome. We had used Gr 91 in our calculations and drawings for the plate materials, as it was the only grade of 9cr in our software (Advance Pressure Vessel). The material we received is grade 9, and it was rejected as...