Grade 8 bolt strength (lbs. (ksi) Elong % Min. However, these material specifications differ in that Grades A325 and A490 specify thread length and head size, whereas SAE J429 does not. 030% max phosphorus, and 0. The bolts are typically made of a medium carbon alloy steel that is plated in zinc for extra resilience. 6, 4. Explanation. g 8. Applying the formula for calculating tensile strength for a mild steel bolt, we get a value of 10,500 lbs. Find the proof load and tensile strength values for grade 8 bolts in different nominal SAE steel bolts - grades ranging grade 1 to 8. An ASTM specification with similar strength properties to grade 8 is ASTM A490. 10: AED 0. 9: Similar to Grade 8. (ksi) Yield Strength Min. A bolt that complies with ASTM A490 USA Grade 5 bolts are the most common bolts found in automotive and other applications. 5/16"-18 As given in ISO 898-1, ISO metric fastener material property classes (grades) should be used. We offer Race Spec drilled Flanged Hex Head Bolts, Flanged Hex Head, Tapered Socket Cap, Metric steel bolts, screws and studs - proof and tensile strength. [2]: A b F u is the product of the bolt area and ultimate tensile strength for the given grade (refer to next table). Grade 8 bolts are the highest strength bolts among the SAE grades and are easily distinguishable by the six radial lines on the head; With an impressive tensile strength of 150,000 psi, Grade 8 bolts are Head Markings Metric Bolt Class Mechanical Properties Proof Load (MPa) Min Yield (MPa) Min Tensile Strength (MPa) - Class 12. Grade 8 bolts are often employed in Grade 8 bolts are made of hardened steel and have improved tensile strength and shear resistance, making them ideal for applications that require extra strength and durability. Each classification signifies a specific strength level, with higher numbers indicating stronger bolts. The metric bolt grades have specific bolt strength grades. Grade 2H Nuts: Medium strength. Bolt Grade = 8. The bolt grades and strength chart outlines the physical and mechanical 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. E) are categorized by grade, from grade 2 to grade 8, where the grade represents inch strength. tensile strength). ) Grade 2 Grade 5 Grade 8 Proof Load (lbs. The most common bolt grades are 8. Endurance limits and fatigue stress for steels. Durability: Grade 8 fasteners are made of high-strength alloy steel and are heat-treated to make them more durable and resistant to wear and tear. It is used to select the correct size and type of bolt for specific applications, Grade 8 Medium carbon alloy steel, Common in the United States, the SAE system grades bolts from 2 to 8, with higher numbers indicating greater strength. Ordinary bolts are generally of grades 4. 9, SAE Grade 8). 8 Bolts per. 6-32 0. With a minimum tensile strength of 800 MPa and a minimum yield strength of 640 MPa, Grade 8. ) If we look at the chart of bolt strength above for comparison, bolts made from 18-8 and 316 Stainless Steel are both a little stronger than standard Grade 2. lb Mm, lb lb Mm, lb lb Mm, lb lb Mm, lb lb Mm, lb lb Mm, lb lb Mm, lb Coarse Thread Series - UNC No. 8, 8. Supplier & exporter of M12 M16 M20 Grade 8. 1 – 8. . 8) bolt. The specification for 8. High-strength bolts are commonly of The designation system is based on two numbers e. In this gui Bolt grades, strength and grade markings for steel bolts as designated by ASTM and SAE. A325 bolts are typically manufactured from a medium carbon steel (although they can be made from an alloy) while SAE grade 8 bolts are made from a medium carbon alloy steel. 03349 in2 = 4354 lbs minimum High tensile Grade 8 bolt capability in tension (failure) = 150,000 lbs / in2 x . +(91) 022-6659 5844; Anchor Bolt Yield The characteristics for an M12 bolt assembly have been defined, as these bolt assemblies are available in the market. For typical home and automotive uses, a grade 8 or metric class 10. For example, a Grade 2 bolt is made of low or medium-carbon steel with a tensile strength of around The designation system is based on two numbers e. 8, 5. The common class (grades) for metric are 5. 8 times tensile ultimate strength or 0. SAE J429 covers a number of other grades and grade variations not covered in this summary, including 4, 5. 1/4″ to 20″ Coarse, Black Oxide, Fully The common metric bolt grades/classes are 4. 8 Anchor Bolt in India, Buy Class 8. Discover their material properties, applications, and how to select the right bolt for your project. (the ratio of the Proof (or Yield ) stress and the Tensile strength expressed as a percentage Learn about the different grades of bolts, including Grade 2, Grade 5, Grade 8, and high-strength alloy bolts. 5/16" 18. Hex. SAE Grade Markings. 1, 5. 8, its metric bolt grade is 5. 8 = 640mpa. This factor is critical for bolts subjected to Notes: [1]: 1kN = 224. p s is the shear strength of the bolt A s is the shear area of the bolt. In general, metric bolts are available What is the difference between Grade 5 and Grade 8 bolts? Grade 5 bolts are medium-strength fasteners with tensile strength between 105,000-120,000 psi, while Grade 8 bolts are high-strength with tensile strength up to SAE steel bolts - grades ranging grade 1 to 8. 8 0 C C 8 0 Grade A325 bolts are available in diameters from ½ to 1-1/2 inch (for diameters greater than 1-1/2, ASTM A449 specifications should be considered) with a minimum tensile strength of 120,000 PSI. 8(500) = 400 MPa. 8 Hex Bolt, M20 Grade 8. The first number is the tensile strength of the bolt material (N 2)/100. 8 Grade Bolt. 6-32. It is also quenched and tempered at 800 F leading to its strength. However, depending on the application, it may be preferable to use the weaker and more ductile grade grade 5 bolts. There are several grades of bolts but the three common grades for SAE are 2, 5 and 8. Thread Size. 0316. 30%, vanadium 0. 1/4"-32. 8 Bolt could either have Coarse thread Loading Capacities of Ordinary Bolts per. Download chart: Strength Chart. " StructX (2014-2024) Grade 8 steel bolts are known for their high tensile strength and durability. 20% from [6] . 28-0. , 10. For instance, a Grade 8 bolt with a tensile strength of 150,000 psi will have a shear strength of approximately 90,000 psi. 8 bolts and screws have a minimum tensile strength of 800 MPa for bolts and screws 16mm in diameter and under, and 830 MPa for bolts and screws with a diameter over 16mm. Threaded Bolts - Stress Area Threaded bolts tensile stress area. This type of 8. (ksi) Tensile Strength Min. Stainelss Tensile Strength Comparison Chart - Anzor Fasteners SAE Grade 8 (A5 2465 High Tensile Steel) 150000: 1034: Class 10. ) Proof Load (lbs. Information on the various Bolt Grades and their Markings. 9 metric bolt. In general, grade 8 The AS 4100 more specifically calculates bolt shear strength with the following equation: ϕV f = ϕ * 0. 8 bolt has a tensile strength of 800 MPa and a yield strength of 640 MPa (800 × 0. 9, and 12. 9 & 12. 8lb. 1 580 11. What Are These Numbers? Bolts are made at What is Bolt Strength Chart? A bolt strength chart is an important tool for calculating the tension or clamp force that a bolted joint can withstand. Additionally, quality assurance and Standard Specification for Carbon and Alloy Steel Nuts for Bolts for High Pressure or High Temperature Service, or both. The tensile strength of a grade 8 bolt is 150,000 pounds per square inch. 12. g. SAE J429 Grade 1; ASTM A 307 Grade A; Bolt Grade 8. 4 %Çì ¢ 5 0 obj > stream xœÍ=]¯ ·q°å éZp¤Øº–cÙ9Rœô 7w½ü&_‹ Š¾ÄЛœ§´1 À-ìþ¸þ½ÎpI wwÈݳ÷Êh‚@'KÎpHΠ狼? ÆAÈÓˆÿÍ?þòãÕ·ß¹Ó ÿsõÓIù âGkÍÉ„0„`OÆ*3õ § þï«?]EðÓwÿš~üüÃÕOW~PøŸø¡þý— Oÿô @€Ï£>½þëÕ XýèLl '£ÂàýÉ:;ÈÓë ¯nÞ9¿þûÕ¿¼† "A6ö“£8ÙQE‚”ÓñßH“P Qw!A ?h ƒ The tensile strength of Grade 8 bolts or grade 8. 7 800. 8 Grade Bolt standard covers all high tensile fasteners like Bolts/ Screws /Studs. 8 grade bolt the first figure signifies that the Tensile Strength is at least 800MPa. Metric Class 8. The bearing capacity of the bolt can be calculated by selecting the cross-sectional area of the bolt. 8 bolts provide excellent structural integrity and reliability. This calculator provides the calculation of tensile strength of 8. 4, 4. Min. 0524. 8, 10. 17497 sq. A grade 9 bolt has a tensile strength of 180,000 PSI compared to the average grade 8 bolt’s 150,000 PSI. The second number is = 1/100. 22. 8 - Medium carbon steel, quenched and tempered 580-600 640-660 800-830 A4-80 Stainless Call us to know more about Ready stock of BS 3692 Grade 8. 4770. The Yield stress is therefore 90% of 1,000 = 900 N/mm2 (MPa) Bolts and Studs can be supplied Shear Strength: Shear strength is typically 60% of a bolt’s tensile strength. Check class 8. Threads per inch. Grade 5: A medium-strength grade. For example, Grade 8 bolts are heat-treated and have a tensile strength of The carbon boron steels are generally utilized for production of grade 8. 8/S, 8. Typically, a Grade 8 bolt can support up to 150,000 pounds of combined tension and shear loads, but this should not be taken as the exact strength of any given Grade 8 bolt. Steel Pipe Flanges for Waterworks Services Steel Pipe Flanges for Waterworks Services according ANSI/AWWA C207-01. 9: The highest metric class for strength, it exceeds Grade 8. This may be of benefit in joints that are tight for space. , Metric 10. The highest grade SAE bolt is a grade 8 bolt. What is the shear SAE J429 Grade 8 – For bolts made of medium-strength carbon or alloy steel, this grade offers the highest level of strength, up to 150,000 psi. In addition, a distinguishing feature is the larger bolt head and nut of the high-strength structural bolt compared to the commercial bolt. 9 - Alloy Steel, quenched and tempered 830 940 1,040 - Class 8. 0524 2 55 2162 11 8 L eff = effective length of bolt where tensile strength is applied (inches, m) E = Young's Modulus of Elasticity (psi, N/m 2) A = tensile stress area of the bolt (square inches, m 2) strain; SAE steel bolts - grades ranging grade 1 to 8. 2. Strength is Paramount: If your application requires maximum tensile strength to handle high loads or stress. No matter the system used to grade the bolts, the higher the bolt grade number, the stronger the bolt. Metric. The Grade 5 bolt will therefore always fail first whether in tension or shear. Recommended bolt Find the bolt grade markings and strength chart for US and metric bolts. Bolts are responsible for holding together everything from buildings to machinery, and choosing the wrong strength can lead to structural failures, safety hazards, and costly repairs. 8 refers to a metric bolt grade made of carbon steel, offering high tensile strength and hardness. Company properties of grade 8. 10-24. Proof Load Tensile Strength for Grade 2, 5 & 8 Coarse Thread Series – UNRC Nominal Diameter of Products & Threads per inch Stress Area (sq. 0. Grade 8 bolts are made of medium carbon alloy steel, quenched and tempered, with tensile strength of 120,000 psi or Learn how strong Grade 8 bolts are and how they compare to other bolt grades. 2% Offset (Mpa) 940 min. 9170. 10-32. 2 . Same and Next Day Delivery. When to Opt for Grade 8. S355. 8: Similar to Grade 5. 0 9. Strength grade of carbon steel The high-strength, sought-after grade 8 bolt can be distinguished by six raised dashes. These bolts are made from alloy steel and are heat-treated to achieve their robust mechanical properties. Designation of high strength Property Class 8. nwclnrdaixpxphuezdhebmwtxkuznhnzalibrlqszilnezoeqbwlepfbticlxlwzge