What is an A307 bolt?

ASTM A307 Grade A is a standard material specification for medium strength carbon steel fasteners specially bolts, studs and threaded rods for general purpose applications. Grade A is a heat treated carbon steel bolting material with minimum tensile requirement of 60 ksi and hardness range from 121 to 241 BHN.

What does a A307 bolt 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.

What are A307 bolts used for?

A307 Grades

Heavy hex bolts and studs intended for flanged joints in piping systems with cast iron flanges. Nonheaded anchor bolts, either bent or straight, intended for structural anchorage purposes.

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.

IT IS INTERESTING:  Can you replace head bolts with studs one at a time?

Is A307 the same as Grade 5?

Basically, they are the same.

Is 307A bolt stainless steel?

Stainless steel 307a hex bolt. Our Competitive Advantage:Non-Standard and Customized FastenersPrecise Screws.

What grade is an A307 bolt?

ASTM A307 Grade A is a standard material specification for medium strength carbon steel fasteners specially bolts, studs and threaded rods for general purpose applications. Grade A is a heat treated carbon steel bolting material with minimum tensile requirement of 60 ksi and hardness range from 121 to 241 BHN.

How strong is a 307A bolt?

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 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.

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 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
IT IS INTERESTING:  Can you replace head bolts one at a time?

What is A307 threaded rod?

The ASTM A307 specification covers carbon steel bolts and studs ranging from 1/4″ through 4″ diameter. A307 is an economical low carbon material often manufactured using A36 round bar. Dimensional specifications are governed by ASME B18.

What is considered a high strength bolt?

Most people in the industry would interpret the phrase “high strength” to refer to any bolt that has been quenched and tempered (heat treated) to develop its strength. … Both SAE J429 Grades 5 and 8 have been quenched and tempered and would be considered “high strength” by most.

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 difference between SAE and ASTM?

ASTM (American Society for Testing and Materials) covers primarily bolts and fasteners for construction applications. SAE (Society of Automotive Engineers) covers fasteners for automotive, machinery, and OEM applications.

What is stronger grade 8 or B7?

With a minimum tensile strength of 150 ksi and a minimum yield of 130 ksi, Grade 8 has a higher tensile and yield strength than other steel grades such as Grade 5 and B7. It is also quenched and tempered at 800 F leading to its strength. … The preload or thread tension in a fastener is higher with Grade 8 quality steel.