What does A307 grade mean?
What does A307 grade mean?
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.
Is A307 a Grade 5?
A307 bolts by AISC ASTM designation are common bolts. Our superintendent went to get “A307” bolts as designated by the engineer on his structural plans, and they tell him they are no longer made and only carry Grade 5 bolts.
Is A307 a high strength bolt?
ASTM A307 bolts are not assigned to a group since they are not considered to be high strength bolts. The ultimate tensile strengths for A325 and A490 bolts are 120 ksi and 150 ksi respectively.
What is A307 thru bolt?
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.
Are A307 bolts galvanized?
A Hex Bolt (named for its six-sided head), is the industry standard for fasteners with forged heads. Each of our A307 Hex Bolts is made from premium low carbon steel and is galvanized to give it the needed protection against corrosion, making it last longer that its non-galvanized counterpart.
Is A307 a Grade 2?
You will often hear about A307 and Grade 2 bolts as being equivalent. While they are small differences they each are referred to as “low carbon” fasteners. A307 is an ASTM (industrial) spec, while Grade 2 is an SAE J429 Grade 2 (automotive) spec.
What is the yield strength of A307 bolts?
Strength Requirements by Grade
| Specification | Material and Treatment | Mechanical Properties |
|---|---|---|
| Yield Strength Min (ksi) | ||
| A307 Grade C | Low or Medium Carbon Steel | 36 |
| F1554 Grade 36 | Low or Medium Carbon Steel | 36 |
| F1554 Grade 55 | Low or Medium Carbon Steel | 55 |
What is ASTM F1554?
F1554 is an ASTM specification for cast in place anchor bolts. It was established to clarify material properties for anchor rods used in concrete. The F1554 specification also qualifies two grades in addition to grade 36, grade 55 & grade 105.
How strong is a 307A bolt?
60,000
Bolt Grade Markings and Strength Chart
| Head Marking | Grade and Material | Mechanical Properties |
|---|---|---|
| Min. Tensile Strength (psi) | ||
| 307A Low carbon steel | 60,000 | |
| No Markings | Grade 2 Low or medium carbon steel | 74,000 |
| 60,000 |
Are all A307 bolts galvanized?
What size bolt is 307A?
5/16-18
These 307A grade zinc plated bolts are 5/16-18 thread and are 4″ in length with a full length thread.
What nuts go with A307 bolts?
Hex nuts (also referred to as finished hex nuts) are available in ASTM A563-A and compatible with low carbon steel bolts such as ASTM A307, ASTM F1554 grade 36, SAE grade 2, and AASHTO M183.
What is ASTM A307 steel?
The ASTM A307 is an ASTM International standard for carbon steel bolts and studs ranging from 1/4 inches through 4 inches in diameter which is set by the standards organization ASTM International. Given here is the bolt torque chart for the ASTM A307 bolts.
What is the shear strength of a bolt?
Shear Strength The shear strength of a bolt is a measurement of the minimum amount of force needed to break the bolt into two pieces. The shear strength of a metal bolt is approximately 0.6 times its tensile strength. A bolt commonly shears where its head meets the threads.
What is grade in bolts?
Bolt grades include a grading of 2, 5, 8 and 18-8 stainless in the U.S. grade systems. The grade is determined by the material used to construct the bolt and the material properties of the bolt. A grade 2 bolt has no markings on the head of the bolt and is made of low or medium carbon steel.
