: 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.
The specification requires the following tests to verify compliance: astm a307 specification
ASTM A307 is not a compromise; it is a deliberate choice for a specific engineering niche. It represents the principle that not every connection requires a high-strength alloy. From securing light machinery to assembling low-pressure pipe flanges, the A307 bolt provides predictable, cost-effective performance where ductility and general utility are paramount. For the engineer, understanding ASTM A307 means recognizing that reliability often comes not from maximum strength, but from the appropriate application of a proven, workhorse material. In a world that often celebrates the extraordinary, the quiet dependability of ASTM A307 remains a cornerstone of safe, practical design. : Specifically intended for flanged joints in piping
Generally limited to heavy hex bolts or fully threaded studs to ensure proper seating in flanges. Grade C (Withdrawn) Grade C Eliminated From ASTM A307 - Portland Bolt It represents the principle that not every connection
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