10. 9 on a bolt refers to the bolt’s tensile strength rating. Tensile strength is a measure of how much stress a material can take without breaking or failing. 10. 9 is a higher rating, meaning the bolt is rated to withstand greater amounts of stress before it breaks.
This makes 10. 9 bolts ideal for applications where the bolt needs to bear a heavy load for a long period of time. These bolts are commonly used in automotive and construction projects, where strength and reliability are important.
Is 10.9 stronger than Grade 8?
No, Grade 8 is actually the stronger of the two, as it has a higher rating than 10. 9. Grade 8 is a higher grade of steel and is rated at 150,000 pounds per square inch (psi) tensile strength, while 10.
9 is rated at 120,000 psi tensile strength. This means that Grade 8 has a higher capability of withstanding external forces, making it a stronger grade than 10. 9. Grade 8 is commonly used in applications such as automotive parts and heavy machinery components, where a high level of strength is required.
Is Grade 10.9 the same as Grade 8?
No, Grade 10. 9 is not the same as Grade 8. Grade 10. 9 is a higher grade than Grade 8, as it is considered a ‘High Strength’ or ‘Extra Strength’ grade of steel. Steel is classified based on a grading system that was developed by the Society of Automotive Engineers (SAE) and the American Iron and Steel Institute (AISI), which assigns a numerical value to different grades of steel.
Grade 8 is given a lower numerical value than Grade 10. 9 and is typically used for less strenuous applications, such as agricultural and automotive parts, while Grade 10. 9 is typically used for more strenuous applications such as heavy-duty equipment and parts that are subject to intense loads or stresses.
How strong is a 10.9 bolt?
The strength of a 10. 9 bolt is determined by its grade. Grade 10. 9 bolts are made from alloy steel and heat treated to a minimum tensile strength of 1040 MPa (Megapascals). They feature a larger than standard shank diameter to increase the force-holding capacity of the bolt; they are generally used in high-stress applications.
10. 9 bolts are also commonly referred to as “metric socket head cap screws” due to their head shape.
In comparison to Grade 8. 8 bolts, which are the lower grade of bolts and have a minimum tensile strength of 800 MPa, Grade 10. 9 bolts are significantly stronger and can hold up to 30% more force than those of Grade 8.
8.
Overall, 10.9 bolts are much stronger than 8.8 bolts and can be used in a range of different applications where added strength is needed.
What is Grade 8 steel equivalent to?
Grade 8 steel is a medium carbon alloy-steel that has been hardened to resist wear (abrasion) and is typically used for high-tensile strength fasteners, such as bolts and screws. Grade 8 steel often has a tensile strength of 150,000 psi or more and is often plated with a yellow chromate or zinc finish to improve corrosion resistance.
Grade 8 steel is roughly equivalent to SAE-AISI 1045 steel, an unalloyed medium carbon steel; SAE-AISI 4140 steel, an alloyed medium carbon steel; SAE-AISI 4340 steel, an alloyed steel with extreme strength; and ASTM A194 Grade 8 steel, a medium carbon alloy steel commonly used for high strength applications.
Is there a Grade 9 bolt?
Yes, Grade 9 bolts (i. e. , ASTM A193 Grade B9 bolts) are high-strength alloy steel bolts manufactured to the American Society for Testing and Materials (ASTM) A193 specification. Grade 9 bolts are identifiable by their six evenly spaced radial lines on the head of the bolt.
This type of bolt is commonly used in operations where extremely strong bolts are required, such as in certain automotive applications, petrochemical plants and nuclear power plants. Grade 9 bolts from A193 also correspond with other ASTM and SAE specifications such as A320, A307, A490 and F593.
Grade 9 bolts are usually plated or galvanized for corrosion resistance.
Which bolts are the strongest?
The strongest bolts are grade 8. 8 and 10. 9 steel bolts. Grade 8. 8 bolts have a minimum tensile strength of 800 MPa and are often used in demanding structural applications such as automotive and industrial engineering.
Grade 10. 9 bolts have a minimum tensile strength of 1040 MPa and are commonly used in aerospace, military and automotive applications. While a grade 8. 8 bolt may be suitable for most applications, grade 10.
9 is the highest-rated bolt and is recommended for the most demanding applications.
Is a 10.9 bolt metric or standard?
A 10. 9 bolt is a metric bolt. Metric bolts are labeled with the lower case “m” followed by the bolt’s nominal diameter and the strength of the bolt. 10. 9 is a grade 10. 9 bolt, which is the second strongest grade of bolt you can get for a standard metric bolt.
10. 9 bolts are marked with the number 10. 9 on the head of the bolt or with a electric blue color. The strength of a 10. 9 bolt is equivalent to a grade 5 bolt in the imperial system.
How do I know if my bolts are metric or standard?
To determine whether a bolt is metric or standard, you can use a measuring tool such as a caliper or ruler to measure the diameter of the bolt. Metric bolts are typically marked with a series of numbers that indicate the diameter, thread pitch, and length.
These numbers are typically located near the head of the bolt and will be separated by hyphens. For example, a metric M10-1. 5 bolt would have a 10mm diameter, a 1. 5mm thread pitch, and a specific length.
Standard bolts, on the other hand, are not marked and can only be identified by measuring their diameter. In most cases, standard bolts have a diameter range between 1/4 inch (6. 35mm) to 1 inch (25.
4mm). If the diameter is outside this range, it is likely a metric bolt. You may also be able to identify a bolt by referring to a chart that lists the different sizes and types of each type.
What bolt grades are metric?
Metric bolts are available in a variety of grades, including bolt grades 8. 8, 10. 9, and 12. 9. Grade 8. 8 bolts are the most common grade for metric bolts, and are considered a medium-strength bolt that is used for most standard applications.
Grade 10. 9 bolts are used for high-strength applications, and Grade 12. 9 bolts are used for the highest strength applications. Metric bolts may also have specific markings depending on their grade, such as 8.
8 being marked with either 88 or 10. 9 being marked with 10 and a triangle symbol, or 12. 9 being marked with 12 and two dots.
Are most bolts metric or SAE?
The majority of bolts available on the market today are metric bolts. The metric system is widely used by engineers and manufacturers when manufacturing parts for machines or other constructed items.
The metric system is based on decimal measures and provides a more precise measurement than the older SAE (Society of Automotive Engineers) measurements. Metric bolts generally feature a shank diameter and thread pitch that is a multiple of a standard measurement.
They are made with different strength ratings, head sizes and drive configurations, making them suitable for a broad range of applications. In comparison, SAE bolts feature fractions of an inch measurements that are used occasionally in some industries, such as automotive.
SAE bolts tend to be found mainly in old machinery or equipment, as they are becoming less popular due to the prevalence of more precise metric bolts and fasteners.
How do you tell if a nut is metric or SAE?
In order to determine if a nut is metric or SAE, you need to measure it. Metric nuts typically have a metric thread pitch, which is the distance between the threads, and are usually labeled with the metric class.
SAE nuts typically have a much finer thread than metric nuts and are identified by the American SAE (Society of Automotive Engineers) numbering system. To measure a nut, use a combination of measuring tools like nut wrenches, thread pitch gauges, and calipers.
A nut wrench is designed with a set of open-ended slots that fit on the sides of a nut while a thread pitch gauge comprises of different sized notches that measure the threads of the nut. If you cannot recognize the nut by simply looking at it, then use a caliper to determine its size with an accuracy of up to 0.
01 mm. Once you have measured the nut, you can match up the measurements on a standard chart to confirm whether it is metric or SAE.
What is a Grade 5 bolt in metric?
A Grade 5 bolt in metric is a medium strength bolt made of alloy steel that is capable of sustaining higher strength than a Grade 2 bolt, but not quite as much as a Grade 8 bolt. Specifically, a Grade 5 bolt in metric is made of steel that is classified as 8.
8 into the metric grading system. This means it has a minimum tensile strength of 880 MPa (megapascals) and a minimum yield strength of 800 MPa. This is considerably stronger than what a Grade 2 bolt in metric (which has a 4.
6 classification) can provide. The diameter of a Grade 5 bolt in metric varies depending on the diameter of the bolt, with lengths starting at 2mm and reaching up to 100mm.
How are metric bolts labeled?
Metric bolts are labeled based on their properties such as thread pitch, length, diameter, and strength. For example, a metric M10x1. 25×60 bolt is 10 mm in diameter, has a thread pitch of 1. 25 mm, and is 60 mm in length.
The strength of the bolt is denoted by the first part of the label, with ‘M’ standing for medium strength and ‘B’ standing for high strength. For example, a B10x1. 25×60 bolt would be of high strength.
Every metric bolt also has a property class, normally represented by a ‘Class’ of either 8. 8, 10. 9, or 12. 9, which indicates its strength properties. For example, a Class 8. 8 bolt is made from low or medium grade steel and is the weakest type of bolt.
A Class 10. 9 bolt is made from a medium grade steel and provides a higher tensile strength, while a Class 12. 9 bolt is made from a high grade steel and is the strongest of the three.
How can you tell if a metric bolt is grade 8?
A metric grade 8 bolt can be identified by a number of different markings that are placed on the head of the bolt. These markings typically include a small blue-colored star in the center, the letters “GR” or “GR8” in a round circle, the number “8” stamped in a four-pointed star, or the letter “C” with a line down the middle.
The head of the bolt might also show a 6-digit number that indicates the tensile strength rating.
Grade 8 metric bolts are made from carbon-alloy steel, and are often marked with a yellow stripe for easy recognition. They usually feature a caked black oxide coating to resist corrosion and are designed to sustain medium to heavy load bearing applications.
The higher grade means that they are generally harder and have greater tensile strength than metric bolts of lower grades.
It is important to inspect a grade 8 metric bolt before use to ensure that it is free of visible damage, that its markings match the required grade, and that the diameter and length measurements are accurate.