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grade 8 bolt strength chart

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Strength Requirements by Grades Packer Fastener

The tensile strength of a grade 8 bolt is 150 000 pounds per square inch Tensile strength is the maximum load in tension stretching that a part can carry without breaking In addition to tensile strength other mechanical factors in a connection should be considered including yield strength and proper assembly of the parts 7 1 2017 nbsp 0183 32 Reference to Table 1 shows that the yield strength of a Grade 8 bolt is higher than the ultimate strength of a Grade 5 bolt The Grade 5 bolt will therefore always fail first whether in tension or shear The only gotcha with the Grade 8

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Bolt Torque Chart AFT Fasteners

The tension capacity of the bolt is given by P nom 0 8p t A t Nominal P t p t A t Exact Where p t is the tension strength of the bolt The shear capacity of the bolt is given by P S p s A s where p s is the shear strength of the bolt A s is the shear area of the bolt In the table As has been taken as equal to At Grade 5 – indicates medium carbon steel Can be identified by searching for 3 radial lines on the head of a bolt Grade 8 – indicates medium carbon alloy steel Can be identified by searching for 6 radial lines on the head of a bolt Grade A325 indicates a carbon alloy steel with or without boron and you would see A325 on the head

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Strength Specifications of Metric Threaded Fasteners

Proof Strength MPa Min Yield Core Hardness Rockwell Strength MPa Min Tensile MPa Grade Identification Marking Min Max 4 6 Low or medium carbon steel M1 6 M39 225 240 400 58 000 PSI B67 B95 8 8 Medium carbon steel quenched amp tempered M1 6 M16 580 640 800 116 000 PSI C22 C32 M18 M39 600 660 830 120 000 PSI C23 C34 10 927 3 2020 nbsp 0183 32 Facebook Twitter The shear strength of a grade 8 bolt is 90 000 psi assuming the bolt is between 1 4 inch to 1 inch Shear strength is typically estimated to be 60 percent of tensile strength The tensile strength of a grade 8 bolt is at least 150 000 psi All grade 8 bolts have the same tensile strength per square inch

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Grade 8 Bolts Coarse and Fine Thread Grade 8 Nut and

24 2 2010 nbsp 0183 32 What is the shear strength of grade 8 bolts 1 4″ – 1″ Call accepted by Dane McKinnon Currently in room Dane McKinnon Henry Dane McKinnon Good afternoon Henry Shear strength is typically 60 of tensile strength and the minimum tensile strength of a grade 8 bolt is 150 000 psi These metric bolt torque charts show the ideal tightening torque for class 8 8 10 9 and 12 9 bolts for both wet and dry tightening The bolt s class indicates its material strength with higher numbers meaning higher tensile and yield strength The classes are set by the International Standards Organisation or ISO

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Shear Strengths Comparison Grades 2 5 amp 8 Allied Bolt

24 rows nbsp 0183 32 Bolt Grade Markings amp Strength Chart Metric Steel Bolts Head Marking The designation system is based on two numbers e g 8 8 The first number is the tensile strength of the bolt material N 2 100 The second number is 1 100 the ratio of the Proof or Yield stress and the Tensile strength expressed as a percentage 100 Yield Proof stress Tensile strength 100

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Grade 8 8 Bolts BS 3692 Class 8 8 Jh Metric Hex Bolt

Grade 8 8 10 9 ASTM A325 High Strength Hot Dip Galvanized Hex Bolt and Nuts Chile Italy Iran Singapore Class 8 8 Zinc Plated Steel Hex Bolt M10 1 5 60mm Length Norway Malaysia United Arab Emirates Turkey DIN933 full thread grade 8 8 carbon steel hex bolts Indonesia Belgium Dammam KSA Philippines Bolt Failure Chart Standard 48 52 5 24 Nominal Diameter Stress Area Grade 2 Grade 5 Grade 8 Grade 2 Grade 5 Grade 8 Grade 2 Grade 5 Grade 8 in in2 in in in in in in in in in 1 4 20 0 250 0 0318 0 14 0 23 0 29 0 13 0 21 0 27 0 29 0 47 0 58 5 16 18 0 313 0 0524 0 19 0 31 0 38 0 17 0 28 0 35 0 38 0 61 0 77

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Bolt Grade Markings and Strength Chart

23 rows nbsp 0183 32 Grade 8 Medium carbon alloy steel quenched and tempered 1 4 quot thru 1 1 2 quot 120 000 130 000 150 000 Grade A325 Carbon or alloy steel with or without boron 1 2 quot thru 1 1 2 quot 85 000 92 000 120 000 Stainless Markings Vary 18 8 amp 316 Stainless Steel alloy with chromium and nickel All sizes thru 1 quot N A 20 000 Min 65 000 TypicalSAE J429 Grade 5 K 0 15 K 0 17 103 121 128 171 105 120 141 3706 245 1817 2371 2688 3162 278 1363 46 82 92 109 K 0 20 FNL Grade 9 Clamp Tightening Torque Load Tightening Torque SAE J429 Grade 8 K 0 15 4169 K 0 15 K 0 17 K 0 20 Unified Coarse Thread Series Fine Thread Series 3544 K 0 15 383 91 325 78 287 68 327 157 K 0 17 281

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Table of design properties for metric steel bolts M5 to

properties of grade 8 8 bolt amp nut iso bolt size pitch stress area mm2 bolt stud screw iso 898 1 gr 8 8 nut iso 898 2 gr 8 proof stress n mm2 proof load kn tensile stress n mm2 tour que n m hard ness hrc elonga tion proof stress n mm2 proof load kn hard ness hrc m6 1 20 1 580 11 7 800 0 9 4 22 32 12 0 855 17 2 30 max27 3 2014 nbsp 0183 32 Grade 8 bolts are specified for high strength applications and are commonly used in heavy manufacturing such as tractor and truck fabrication for instance The bolts are typically made of a medium carbon alloy steel that is plated in zinc for extra resilience The grade 8 bolt can be identified via the flat hexagonal head marked by six radial lines and occupy the highest

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SAE Bolt Torque Chart – Grade 2 Grade 5 Grade 8

Hex Bolt Identification Markings and Strength Chart Additonal information on bolts is located at the bottom of the webpage Note Some bolts share identical head identification and have significantly different strengths SAE J429 Grade 8 K 0 15 4169 K 0 15 K 0 17 K 0 20 Unified Coarse Thread Series Fine Thread Series 3544 K 0 15 383 91 325 78 287 68 327 157 K 0 17 281 492 784 201 1195 2358 3127 1016 2004 239 418 666 171 588 896 1768 211 151 3024 120 240 420 669 1020 2012 3557 568 867 1710 204 357 66 90 180 315 58 146 102 369 Nominal Dia threads per inch 21

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BOLT GRADE MARKING AND STRENGTH CHART EICAC

SAE bolt grades indicate the strength of the bolt 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 8 1 1993 nbsp 0183 32 According to EN1993 1 8 Table 3 4 the shear strength of the bolt may be based on the tensile stress area Definition of bolt classes 4 6 4 8 etc The yield strength f yb and the ultimate tensile strength f ub for bolt classes 4 6 4 8 5 6 5 8 6 8 8 8 and 10 9 are given in EN1993 1 8 Table 3 1