The additional material requirements should indeed be noted. These are often specified within client specifications (end user) as well as the applicable design code, like ASME B31.3 or EN 13480 as a minimum.
Also the method of design stress determination, by using Tensile, Yield or Hot Yield together with assessment of safety factors are stipulated in the relevant Design Code.
Further on abbver98's statement to take special care for correctly specifying the ASTM materials, if to be purchased according EN standards, should be taken.
Regards.