These charts helps to identify the grades of bolts using the identification marks on the bolt's head along with the strength and hardness of common grade bolts. Please note the bolt heads may also include the manufacturer's identification stamp, especially with high strength bolts.

Tensile Strength: The maximum load in tension (pulling apart) which a material can withstand before breaking or fracturing. Yield Strength: The maximum load at which a material exhibits a specific permanent deformation. Proof Load: An axial tensile load which the product must withstand without evidence of any permanent set.

2021年4月10日 · Let’s walk through how to decipher metric bolt and screw grades, plus their head markings, using one ISO standard and its following property classes as examples: ISO 898-1 Property Class 8.8 Metric Bolt and Screw Head Marking

Common fastener grades and property classes. Strength exceeds Grade 2. Bolts meet ASTM A325 Type 1 standards for structural steel joints. Strength is similar to Grade 5. Same as Grade 5. Use with Grade 2H and Grade C nuts. Strength exceeds Grade 5. Use with heat-treated medium-strength steel fasteners like ASTM A325 structural bolts.

2022年3月28日 · Bolt strength can be divided into ordinary grade and high strength grade. In this article, we’ll introduce the bolt grades system, the meaning of the bolt head markings grade, you can also check out the metric bolt grades chart.

Metric steel bolts, screws and studs - proof and tensile strength. For metric bolts strength is according ISO 898 Mechanical properties of fasteners made of carbon steel and alloy steel described by "property classes" with designations 4.6, 4.8, 5.8, 8.8, 9.8, 10.9 and 12.9. Bolts, nuts and threaded rods - torque, tension and loads.

The bolt grades and strength chart outlines the physical and mechanical properties of various grades of bolts. It includes information on the grade of the bolt, the tensile strength, the type of material, and their common applications.

Bolt grades are essential for ensuring that bolted joints are strong and durable enough to handle the intended load with the appropriate safety factor. These alphanumeric designations categorize bolts based on their mechanical properties, such as …

2023年8月29日 · A bolt grade is a classification system used to specify the physical properties of a bolt. These properties include tensile strength, proof load, and yield strength, among many others. Each grade is identified by numbers and/or letters that correlate to the bolt's material and mechanical properties.

2023年9月7日 · 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, the higher number means the stronger the bolt.