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
