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.
Grade 9 Bolts
Grade 9 structural bolts, also known as grade 9 hex cap screws, are one the strongest structural bolts that can be used today. While the typical grade 8 bolt has a tensile strength of 150,000 PSI, a grade 9 bolt has a tensile strength of 180,000PSI.
The common class (grades) for metric are 5.8, 8.8, 10.9 and 12.9. Each grade has a specific bolt strength. No matter the system used to grade the bolts, the higher number means the stronger the bolt.
Its medium-carbon alloy steel has been quenched and tempered, ultimately making it possible to achieve an impressive tensile strength of 150,000 psi, compared to a grade 2 bolt's 64,000 psi. In other words, a grade 8 bolt is more than twice as strong as a grade 2 SAE American Grade bolt.
Grade 5 Bolts and fasteners are made of medium strength carbon steel and are specified under the Society of Automotive Engineers (SAE). If your application calls for heavier materials, you may need Grade 8 Bolts because they are the hardest and are often used in heavy manufacturing applications.
English bolts have radial lines on their head to identify the grade, or strength class. The number of lines on the bolt head is 2 less than the actual grade. So, for example, a grade 5 bolt will only have 3 radial lines on its head. A grade 8 bolt will have 6 radial lines on its head.
Pros and Cons of 18-8 Grade Stainless Steel
As already mentioned, 18-8 grade stainless steel is celebrated for its superior corrosion resistance. However, it is known to show signs of corrosion when exposed to chlorides, such as salt. Therefore, it is not the ideal stainless steel to use for marine applications.
You will not be able to skip a grade without the approval of your parents (or legal guardian) and the school. Speak to your current teachers to find out if they think you're ready to move up.
Grade 8 is the equivalent of in between grades A* and A. Grade 7 is the equivalent of a grade A.
Grade 8 / Grade G
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.
For others, a grade 6, 7 or even an 8 would be considered good. This depends on the expectations that each individual student has about their own abilities. Essentially, any grade that you feel you are happy with above the standard pass grades of 4 or 5 can be labelled as 'good'.
Grade 8 (SAE J429) is a medium carbon alloy steel with one of the highest tensile strengths available. 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.
Even though US universities don't look at middle school grades, they evaluate students' foundational academic skills, which typically start developing in middle school. For example, middle school students learn to become independent, critical thinkers during their middle school years.
There are several grades of bolts but the three common grades for SAE are 2, 5 and 8. The common class (grades) for metric are 5.8, 8.8, 10.9 and 12.9. Each grade has a specific bolt strength. No matter the system used to grade the bolts, the higher number means the stronger the bolt.
In Australia, Year 8 is usually the ninth year of compulsory education. Although there are slight variations between the states, most children in Year 8 are aged between thirteen and fourteen.
Eighth grade truly sets the path for high school and college success, therefore, it is a crucial time to steer students in the right direction. If you are not sure if your eighth-grader is on the right track, make an appointment with his or her guidance counselor for an assessment and for any possible course changes.
Students most often skip only one grade. For example, you may choose for your child to skip first grade and go straight from kindergarten to second. It's also common for a child to skip second grade, moving from first into third. This single-year skipping keeps the student from feeling too distanced from their peers.
The eighth grade is the ninth school year, the second, third, fourth, or final year of middle school, or the second and/or final year of junior high school, and comes after 7th grade. Usually, students are 13-14 years old in this stage of education.
American schools may oppose grade skipping, or limit it to one or at the most two grades, regardless of the student's academic and social situation. There is no research that supports these limits, and the decision to limit grade skipping is mostly based on the intuition of school personnel.
Grade 8 bolts are designated as a 150 ksi. This means its tensile strength or the resistance it has before it is subject to breaking under tension is equal to 150,000 lbs.
Grade 5 is specified under the Society of Automotive Engineers and is meant to be used for those applications requiring medium strength. Equivalent to the metric class 8.8 bolts, it is important to line up the right hardware if required to move from U.S. customary units (USC) to the metric system.
The hardest and strongest of the hex bolts
Despite the popular belief, a stainless steel bolt is actually weaker than a grade 8 bolt. In fact, according to the Society of American Engineers (SAE), grade 8 bolts are the strongest and hardest hex bolt you would want to use in constructions or the automotive industry.