STEEL BOLT/STUD A307

Grade	Description	Application range
Grade A	Minimum tensile strength of 414 MPa	General applications
Grade B	Tensile strength of 414 to 690 MPa	Flanged joints in piping systems with cast iron flanges
Grade C	Nonheaded anchor bolts, either bent or straight, having properties conforming to A36/A36M(tensile strength of 400 to 550 MPa)	Strctural anchorage purposes(As of August 2007,grade C has been replaced by specification F1554 grade36)