Differences Between A358 and A312
1.2 ASTM A358 specification covers the grades of alloy and stainless steel listed in Table 1. The selection of the proper grade and requirements for heat treatment shall be at the discretion of the purchaser, dependent on the service conditions to be encountered. ... For example, Grades TP304, TP304L, and TP347 are accepted by the ASME Pressure ...