Is Grade 5 equal to A325?
Grade 8 bolts have a minimum tensile strength of 150,000 PSI. As a comparison, the ASTM A325 bolt is roughly equivalent to the SAE grade 5. A grade 8 bolt would be one that meets ASTM A490 standards. The A325 bolt strength, or SAE grade 5 bolt strength, is usually used for structural bolting projects.
What grade of steel is a Grade 5 bolt?
medium carbon steel
As noted above, Grade 5 bolts are made of medium carbon steel that has been quenched and tempered. The normal range size is from a quarter of an inch (¼) up to one and a half inches (1 ½).
Are Grade 5 bolts stronger than Grade 8?
Grade 8 bolts have been hardened more than grade 5 bolts. Thus they are stronger and are used in demanding applications such as automotive suspensions.
Are all Grade 5 bolts the same?
Grade 5 bolts range from ¼” to 1 and ½” in diameter. A different classification is necessary for bolts larger than 1 and ½”. When completed, a manufacture Grade 5 bolt is a finished hex bolt with nuts that also feature a pattern that is finished hex.
Will Grade 5 bolts rust?
Many other grades exist but are used far less often. Grade 2, 5, and 8 are usually plated with a slightly blue-ish or yellow zinc coating, or are galvanized, to resist corrosion.
How can you tell if a bolt is a Grade 5?
Grade 5 bolts are case hardened, meaning the bolt has been heated enough to hardened the outside of the bolt but not enough to harden the inside portion. Grade 5 bolts are identified by 3 evenly spaced radial lines on the head.
Are higher grade bolts more brittle?
The grade 8 will have a higher tensile strength but it’s more brittle and will snap before it bends.
What are A325 bolts?
ASTM A325 Bolts ASTM A325 structural bolts are heavy hex bolts made of medium carbon steel with a flat bearing surface, washer faced, and chamfered point. They are commonly used in structural steel joints in heavy construction and available in diameters ranging from 1/2” up to 1-1/2”.
Are stainless steel bolts stronger than Grade 5?
Stainless steel bolts are rated for corrosion resistance. Bolt strength is rated in PSI (pounds per square inch). A stainless steel bolt has the same PSI rating as a grade 5 bolt (125,000 PSI). A grade 8 bolt has a stronger rating with a PSI of 150,000.
What Rockwell hardness is a Grade 5 bolt?
In comparison, a Grade 5 bolt is weaker as its tensile is 120 ksi, placing it at 120,000 lbs. per square inch in tensile strength. There is also difference in the core Rockwell hardness between Grade 8 and Grade 5 bolts. Grade 8 typically has a core Rockwell hardness of C33-C39, while Grade 5 have a core Rockwell hardness of C25-C34.
What is SAE grade 5 bolt?
Grade 5 bolts are a medium hard bolt and have 3 lines on the head. Grade 8 bolts are made out of alloy steel and heat treated to a real high tensile. Grade 8 bolts have 6 lines on the head. The specification number SAE J429 is the standard that covers these grades, and many other grades that are not as commercially available as these three are.
What is Grade 5 bolt strength?
They have a tensile strength of 60,000 PSI. Grade 5 bolts are a heat treated carbon bolt. Hardened to increase its strength, it’s most commonly found in automotive applications. Grade 5 bolts have 3 evenly spaced radial lines … resembling an airplane propeller.
What are torque specs?
Main and Rod Bearing Caps. Install the main bearing caps before installing the connecting rod caps.