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SAE steel bolts - grades ranging grade 1 to 8.2 - proof and tensile strength. Steel Bolts - ASTM Grades. Steel Bolts - Metric Grades. 1 psi (lb/in2) = 6,894.8 Pa (N/m2) Related Topics. Fasteners. Bolts, nuts and threaded rods - torque, tension and loads. Mechanics.
- Whitworth Bolt Torques
Steel Bolts - SAE Grades SAE steel bolts - grades ranging...
- JIS
Steel Bolts - SAE Grades SAE steel bolts - grades ranging...
- Whitworth Bolt Torques
Sep 18, 2024 · Learn the essentials of bolt and nut grades, including SAE, ISO, and ASTM standards. Discover the differences between US and metric grades, their applications, and how to choose the right fasteners for your project. Whether you need Grade 8, Class 12.9, or stainless steel, this guide covers it all.
Each bolt grade has an ideal tightening torque for maximum clamping force without breaking. Grade 2 bolts are cheap but not very strong, grade 8 bolts are the strongest and most expensive, and grade 5 bolts are the most common. Refer to the charts to find the ideal tightening torque.
- Bolt Grades Explained
- Bolt Grade Standards
- Non-Ferrous Bolt Grades
Bolt grades are alphanumeric designations that categorize bolts based on their mechanical properties. They determine the maximum amount of load the bolt can handle as well as the method that can be used for tightening the bolt. In general, the higher the grade number, the stronger the bolt. The grades are typically indicated by markings engraved on...
Steel is the material of choice for over 90% of fasteners due to its inherent strength, excellent workability, and cost-effectiveness compared to other materials. As a result, many bolt grade standards are primarily focused on steel, which can be either low carbon, medium carbon, or alloy steel. There are three main standards for bolt grades: the c...
Bolts are produced from a variety of materials, each with its own distinct mechanical properties. While steel is the predominant choice in the industry, other metals such as copper, aluminum, titanium, and nickel alloys can also be utilized for specialized bolt applications. Copper bolts are commonly used in electrical installations, grounding syst...
This chart 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.
Bolt Grade / SpecificationMaterialNominal Size (inch)Proof Load PsiGrade 1 - SAE J429 Bolts, Screws and ...Low or medium carbon steel1/4" - 1-1/2"33,000Grade 2 - SAE J429 Bolts, Screws and ...Low or medium carbon steel1/4" - 3/4" >3/4" - 1-1/2"55,000 33,000Grade 5 - SAE J429 Bolts, Screws and ...Medium carbon steel or carbon steel with ...1/4" - 1" >1" - 1-1/2"85,000 74,000Grade 5.1 - SAE J429 SemsLow or medium carbon steel, quenched and ...No. 4 - 5/8"85,000Aug 29, 2023 · SAE grades range from 0 to 8, with subgrades like 5.2 or 8.2. The higher the grade, the stronger the bolt. Here is an overview of the most common SAE grades: Grade 2: This is the standard grade for bolts with no markings. They have a tensile strength of up to 74,000 PSI for bolts over ¼ inch.
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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. 1MPa = 1N/mm 2 = 145 pounds/inch 2. Shop for US Bolts. Shop for Metric Bolts.
