Commercial grade castings are normally used for general engineering purposes in construction and mining industries. They normally qualify ASTM A27,very rarely I have come across ASTM A148.
These will be supplied without any test certificates, probably do not get machined or have limited machining(drilled holes) are not used under low or high temperature environment. No NDT is specified,bulk of the steel castings I produce fall into this category.We earn better margins in these rather than in WCB grades where testing and documentation takes the steam out .