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Bolt standard ASTM A307

This standard covers hex bolts and stud bolts made out of steel and with diameters vary from 1/4 to 4 inches. ASTM A307 bolts are produced out of A36 Steel rod and consist of three grades of A, B and C, each provides a certain amount of strength and resistance, and are very useful in different industries. While Grades A and B of this standard are still being produced, Grade C has been obsolete since 2007 and is now being produced under F1554 A36 standard. Ajaxbolt Co. is an Iranian manufacturer of ASTM A307 bolts.

Mechanical specification of ASTM A307 bolts

Elong % min min Yield ksi Tensile ksi Grade
18 Not available 60 min A
18 Not available 60 to 100 B
23 36 58 to 80 C*

Chemical properties of ASTM A307 Bolts

Grade B Grade A Element
0.29% 0.29% C max
1.20% 1.20% max Mn
0.04% 0.04% P max
0.05% 0.15% S max

Bolt and nut

Bolt standard ASTM A307