Astm A307 Specification ⚡ <OFFICIAL>

: Specifically intended for flanged joints in piping systems, particularly those using cast iron flanges. Unlike Grade A, Grade B has a tensile range of 60 to 100 ksi to prevent over-tightening and damaging fragile cast iron flanges.

ASTM A307 fasteners are typically manufactured from low-carbon steels like AISI 1006 to 1025 or A36 round bar. Grade C Eliminated From ASTM A307 - Portland Bolt astm a307 specification

This specification is divided into three grades, each designated for specific applications: : Specifically intended for flanged joints in piping

: Originally used for unheaded anchor bolts (bent or straight) for structural anchorage. This grade was officially withdrawn in 2007 and replaced by the ASTM F1554 Grade 36 specification . Mechanical & Chemical Requirements astm a307 specification