ASTM A307 Specification
The ASTM A307 specification covers carbon steel bolts and studs ranging from 1/4" through 4" diameter. This is your everyday, run of the mill bolt specification often manufactured using A36 round bar. There are three grades A, B, and C* which denote tensile strength, configuration, and application. Refer to the Mechanical Properties Chart for the subtle strength differences within each grade.
RELIABLE PIPES & TUBES LTD. Manufactures,Stocks & Supplies Bolts,Studs,Threaded Bars/Rods as Specified under Specification ASTM A307 Grade A,Grade B & Grade C.
Mechanical Properties
| Grade | Tensile, ksi | Yield, min, ksi | Elong %, min |
|---|---|---|---|
| A | 60 min | -- | 18 |
| B | 60 - 100 | -- | 18 |
| C* | 58 - 80 | 36 | 23 |
Chemical Compositions
| Element | Grade A | Grade B |
|---|---|---|
| Carbon, max | 0.29% | 0.29% |
| Manganese, max | 1.20% | 1.20% |
| Phosphorus, max | 0.04% | 0.04% |
| Sulfur, max | 0.15% | 0.05% |
Nuts & Washers Recommended
| Nuts | Washers | ||
|---|---|---|---|
| A307 Grades A & C* | A307 Grade B | ||
| 1/4 - 1-1/2 | 1-5/8 - 4 | 1/4 - 4 | |
| A563A Hex | A563A Heavy Hex | A563A Heavy Hex | F844 |
