SA-517 Grades B and E
SA-517 Grades B and E
(OP)
Hello all,
We are in the planning stages to build an ASME Section VIII, Div. 1/MC-331 pressure vessel cargo tank. The vessels in our application are typically built from SA-517 material. I have seen two grades used for construction. Most are made from Grade E, but I have seen a couple that are made from Grade B. I know the basic differences in chemistry between the two, but not being a metallurgist I'm not sure how these differences affect my application. I would think that the Grade E with the higher Chromium content would give improved corrosion properties. I am concerned about Vanadium content in the Grade B due to the ASME Code specifying a maximum Vanadium content of 0.04% in the weld filler metal. My question is why would some use Grade B while most use Grade E, and which is the best for my application? The lading is noncorrosive.
We are in the planning stages to build an ASME Section VIII, Div. 1/MC-331 pressure vessel cargo tank. The vessels in our application are typically built from SA-517 material. I have seen two grades used for construction. Most are made from Grade E, but I have seen a couple that are made from Grade B. I know the basic differences in chemistry between the two, but not being a metallurgist I'm not sure how these differences affect my application. I would think that the Grade E with the higher Chromium content would give improved corrosion properties. I am concerned about Vanadium content in the Grade B due to the ASME Code specifying a maximum Vanadium content of 0.04% in the weld filler metal. My question is why would some use Grade B while most use Grade E, and which is the best for my application? The lading is noncorrosive.





RE: SA-517 Grades B and E
The alloying is done for hardenability reasons. The difference between B and E composition is considerable in that respect. That said, I don't understand why Table 2 shows common tensile requirements for all six grades.
"If you don't have time to do the job right the first time, when are you going to find time to repair it?"
RE: SA-517 Grades B and E
RE: SA-517 Grades B and E
RE: SA-517 Grades B and E
RE: SA-517 Grades B and E