ASTM A307 Specification
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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.
JF ENGG Manufactures,Stocks & Supplies Bolts,Studs,Threaded Bars/Rods as Specified under Specification ASTM A307 Grade A,Grade B & Grade C.
A307 Grades
| A |  |
Headed bolts, threaded rods and bent bolts intended for general applications. |
|---|---|---|
| B |  |
Heavy hex bolts and studs intended for flanged joints in piping systems with cast iron flanges. |
| C* |  |
Nonheaded anchor bolts, either bent or straight, intended for structural anchorage purposes. The end of a grade C anchor bolt intended to project from the concrete will be painted green for identification purposes. Permanent marking is a supplemental requirement. *As of August 2007, grade C has been replaced by specification F1554 grade 36. We will continue to supply grade C, if required by the project. |
Chemical Composition
Typical compositional ranges for grade ASTM A307
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% |
Mechanical Properties
Typical mechanical properties for grade ASTM A307
Grade |
Tensile, ksi |
Yield, min, ksi |
Elong %, min |
|---|---|---|---|
A |
60 min |
-- |
18 |
B |
60 - 100 |
-- |
18 |
C* |
58 - 80 |
36 |
23 |
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For More Information About ASTM A307 Fasteners please call +91 22 2385 6385 / 2385 638 or send an email to info@jfengg.com
