Grade 8 bolts have a strength rating of 800,000 pounds per square inch. Grade 8 bolts are made from manganese steel and coated in zinc or yellow chromate. This coating gives the bolt a yellow color and prevents it from rusting.
In general, grade 8 bolts can be used when high strength is required. In comparison, Grade 5 bolts are less standard than grade 8 bolts due to their lower yield strength of 180,000 pounds per square inch.
Grade 5 bolts are economically priced and an excellent option for low-stress applications in building structures or furniture due to their lack of need for heavy-duty construction materials such as steel studs or trusses.
Grade 5 bolts are coated in oil, not zinc or chromate, which gives them a darker appearance.
Table of Contents
- Comparing Shearing Strength Of Grade 8 Vs Grade 5 Bolts.
- Usage Of Grade 8 And 5 Bolts.
- How Strong Grade 8 Bolt Is Than Grade 5 One?
- Advantages Of Using Grade 8 Bolts.
Comparing Shearing Strength Of Grade 8 Vs Grade 5 Bolts.
The shear strength is the breaking tension, representing the maximum force required to break a bolt.
The grade 8 bolts have a breaking point of 2,500 pounds per square inch (psi), while grade 5 bolts have 1,200 psi.
As you can see, grade 8 bolts are stronger than their counterparts in every way. This is because they are made from stronger material with more Stockton steel and nitrogen content to increase their durability and resistance.
Grade 8 bolts can also be used for higher temperatures than their weaker counterparts for lower breakage rates and greater life spans in applications where equipment fails due to high temperatures, such as power stations and nuclear plants.
This is because it has higher yield strength and tensile strength, which means it can handle greater loads without breaking down.
Grade 8 and grade 5 bolts are used to secure wood projects and to join two pieces of wood together. So, which one of these fasteners should you use in your project?
Usage Of Grade 8 And 5 Bolts.
The higher-grade number indicates a higher strength and flow stress for the bolt material. Grade 8 bolts are suitable for use where very high strength is required, such as suspension bridges, wind turbines, and other heavy-duty applications in both light steel and concrete structures.
Grade 5 bolts can also be used in heavy-duty steel structures but not as recommended since they will only withstand approximately 1/3 of the load that a grade 8 bolt could withstand without fail under the same circumstances.
However, they are considerably less expensive to purchase and install, so they are commonly used by those who need to save money in construction.
Grade 5 bolts are commonly used in building construction or a construction environment and are most commonly found in residential and commercial structures. Grade 5 bolts have a less common application in the industrial sector, making up only 1% of all steel fasteners used.
Grade 8 bolts are also commonly found in both residential and commercial construction. They can be used in many applications, from simple doorknobs to relatively complex structures such as suspension bridges and signs.
Grade 8 bolts are widely used for residential and commercial applications because of the ease of installation and the image of only needing one tool for installation.
The ease of installation allows these bolts to be installed without using an external tool such as a wrench, socket set, or ratchet.
Instead, these types of bolts can easily be installed by using your hands, hands, or other various tools such as pliers or hammers, with all fasteners being fixed in place with a single hand-tightening action.
How Strong Grade 8 Bolt Is Than Grade 5 One?
Grade 8 bolts are at least twice as strong as Grade 5. Compared to grade 5 bolts which can be broken with an 18 ft drop, grade 8 can withstand up to 90 ft drop height without breaking due to the larger diameter of the bolt’s shank or shaft.
The threads of grade 8 also have tighter tolerances for wear and corrosion resistance which is better for the environment and human health.
The Grade 8 has a hexagonal shape, making it more resistant to rotational forces and helping resist corrosion. This design also produces less heat in comparison to its predecessor.
Grade 8 is one of the most common bolts found on structures in North America. The grade 8 bolt has equal strength to a grade 5 bolt used in direct studs.
Grade 5 bolts are commonly used when the building requires non-load-bearing structural members like floors, ceilings, columns, or roof beams but applies force directly against them since they are designed to carry loads but not transfer them directly through the structure.
Advantages Of Using Grade 8 Bolts.
- Grade 8 bolts have a higher ultimate tensile strength than their weaker counterparts (grade 5). This means that the grade 8 bolt will withstand greater loads than a Grade 5 bolt with a lower ultimate tensile strength and is more prone to failure.
- The grade 8’s high tensile strength is commonly used in many applications, such as building structures, bridges, ships, and rockets. Grade 8 bolts are widely used for roofs, walls, and floors due to their slender design and deep threaded shank.
- Grade 8 bolts are more resistant to corrosion caused by saltwater than their weaker counterparts. The grade 5 bolt, on the other hand, is susceptible to corrosion triggered by saltwater because of anodization coating applied to its surface, which compromises its core properties as a bolt.
- This is why grade 5 bolts are used in coastal areas, and fewer structural members in Grade 8 bolts are exposed to saltwater.
Grade 5 bolts are less expensive compared to the grade 8 screws. They are also easier to apply and stronger than nails. However, the lower breaking point is made from low-carbon steel.
Another downside of using the grade 5 bolts is that you cannot use a high load for long periods, weakening them significantly.
If you want something that will carry more load, then go for grade 8 screws instead of grade 5 fasteners. Grade 5 bolts may be cheaper and easier to apply than their counterparts, but they do not last as long or handle high loads like the grade 8 bolt can.