ASTM A307 Grade A Carbon Steel Bolting with minimum tensile of 60 ksi.
ASTM A307 Grade A is grade specification in carbon steel bolting for use in general purpose application. This grade covers hex headed bolts, stud bolts, threaded rods or any other bolting having a minimum tensile strength of 60 ksi.
ASTM A307 Grade A Chemical Composition
| Element % |
Grade A |
| Carbon, Max
| 0.29 |
| Manganese, Max
| 1.20 |
| Phosphorus, Max
| 0.04 |
| Sulfur, Max
| 0.15 |
ASTM A307 Grade A Mechanical Properties
| Grade |
Tensile, ksi |
Yield, min, ksi |
Elongation, min, % |
| Grade A
| 60 min |
-- |
18 |
Compatible Nuts specification for ASTM A307 Grade A Bolting
| ASTM A307 Grade A |
Washers |
| 1/4" to 1-1/2" |
1-5/8" to 4" |
| ASTM A563 A Hex |
ASTM A563A Heavy Hex |
ASTM F844 |
ASTM A307 Grade A Marking Requirement
| Grade |
Details |
| Grade A
| Grade A Bolts are marked or stamped with "307A" along with optional manufacturer's Initial or logo. |