# bolt tensile strength calculator

function tensileStressArea(dia, tpi) { 2）For stripper bolts and others which are subjected to tensile impact loads, the selection is made based on the fatigue strength. var shear = 63000; return Math.round(((coefficient * diameter * cl) / 12) * 10)/10; calcLoad(); T = K x D x P. Where: Tensile Strength of Nut Material: p.s.i. var diameter = dia[index]; var series = unf[index]; UNF Bolt Calculator You are visitor #xxx to the UN calculator. This uses the equations from ANSI B1 1-1974 and B18.3.1-1978 which calculates the area carrying the tensile load from the mean of the pitch diameter and the minor diameter. More specifically and without limitation, UNDER NO CIRCUMSTANCES SHALL FASTENAL BE LIABLE FOR ANY DIRECT, INDIRECT, SPECIAL, INCIDENTAL, OR CONSEQUENTIAL DAMAGES, INCLUDING, WITHOUT LIMITATION, LOSS OF DATA OR PROFIT, PROPERTY AND EQUIPMENT DAMAGE OR INJURY, ARISING OUT OF THE USE, OR INABILITY TO USE, THE LOAD CALCULATOR, EVEN IF FASTENAL HAS BEEN ADVISED OF THE POSSIBLITY OF SUCH DAMAGES. // ]]>. The relation between applied torque and axial force - or load - in a bolt can be calculated in this general equation as. var yield = 159500; var unf = [28, 24, 24, 20, 20, 18, 18, 16, 14, 14, 12, 12 , 12, 12]; var proof = 135000; Nut Factor : Length of Engagement: inches: Static Load: pounds: Ultimate strength can be defined for liquids as well as solids under certain conditions. Related Topics . and n equals thread per inch. return value; As is the nominal tensile stress area of the bolt. var yield = null; } Note that the minimum thickness of a single member (in the "Bolt spacing and edge distance" section) may differ from the minimum plate thickness (in the "Capacity in bearing" section). var value = Math.round(mps * tsa); var load = document.getElementById("grade").value; } else if (load == 140000 && diameter > 0.5) { document.getElementById("dry").value = calcTorque(0.2, diameter, series, load); Cookies are not used for the processing, collection or storage of personal data under any circumstances. var value = Math.round(ts * tsa); } "); var tensile = 60000; } else if (load == 'fnl9') { var shear = 36000; } //output function threadRootArea(dia, tpi) { Changing this settings will alter the functionality of this site and your user experience could be diminished. var tensile = 180000; var tensile = 180000; \$(document).ready(function(){ We provide it as a resource for our customers, because the weight of a bolt or assembly is often needed when calculating shipping costs, or jobsite delivery requirements. A t = (π/4) * (D -0.938194 * p) 2 Where, A t = Tensile Stress Area (inch) D = Diameter (inch) n = Number of threads per inch p = 1/n Example Consider a screw of 0.5 inch diameter with 25 threads, find its tensile stress … function autoCount(){ For a stress regime associated with a bolt i.e pure tensile stress s x combined with shear stress τ xy. This is based on ISO 898 Part 1. see calculation below.. d p = Pitch circle diameter of thread. Tensile Stress Area of Bolt, often represented by At, is a physical quantity used to measure the crirical stress area or the mimimum area of threaded section of a bolt. This too is also a conservative number. The tensile load a fastener can withstand is determined by the formula P = St x As. } The size is equal to the cross-sectional area multiplied by the tensile strength design value of 140MPa. BOLT ULTIMATE STRENGTH CALCULATORS The Calculators below can be to calculate the ultimate (breaking) load of bolts. Critical Stress Area Calculator getcalc.com's Tensile Stress Area of Bolt Calculator is an online mechanical engineering tool to calculate the tensile (critical) stress area or the mimimum area of threaded section of the bolt, in both US customary & metric (SI) units. d p = (D - 0.64952.p ) The thread shear area = A ss If you would like to prevent this website from using cookies, adjust the cookie settings in your browser. function calcTorque(coefficient, diameter, series, load) { See the instructions within the documentation for more details on performing this analysis. function minYieldStrength(mss, tsa) { var shear = 108000; return value; • As= Tensile stress area for fastener or area of material (in 2, mm 2) How do you find the tensile strength of a bolt? function check(na){ Factor of Safety = S y / ( s x 2 + 3 . // 1.1) { (psi) S sy = Working axial load of fastener bolt (lbs) a = Stress area of thread (in 2) Proof load is an amount of force that a fastener must be able to withstand without permanently deforming. T = wrench torque (Nm, lb f ft) K = constant that depends on the bolt material and size . }); document.getElementById("lubricated").value = calcTorque(0.15, diameter, series, load); There exists an often quoted myth, that Grade 5 bolts are better in shear than Grade 8 since they will bend before breaking. Desired Tensile Stress in Bolt: p.s.i. //alert("Error Type!!! Forces in … return [Math.round(cl*dia*tch),Math.round(cl*dia*tcl)]; function torqueRequired (cl, dia, tch, tcl) { } var shear = 108000; return value; //alert("Error Type!! > T = K F d (1 - l/100) (1) where . } • P= Tensile load– a direct measurement of clamp load (lbs., N) • St= Tensile strength– a generic measurement of the material’s strength (psi, MPa). var proof = 140650; return [Math.round((torque/12)*10)/10,Math.round((torque/12)*10)/10]; 800. Only the capacity based on the bolts themselves is computed: this calculator does not check the steel plates being connected for strength or serviceability. } | This nut will have a Proof Load Stress of 8 x 100 = 800 MPa In practice only standard threaded fasteners in the high tensile property classes, i.e. Based on the Yielding in the gross section, design strength: φ t n = φ t F y A g Where Resistance factor, φ t = 0.90 Yield Stress = F y (ksi) Gross area of the member = A g (in ) 2. Keep me signed in (Uncheck when using a shared computer), or Program to calculate the thread stripping strength, shear strength of the thread in tapped holes, minimum thread engagement. } var yield = 92000; So, to use the example above, in order to pass the proof load test set by ASTM A354, a ½-13 bolt must be able to hold a load of at least 17,050 lbf for a minimum of ten seconds without permanently elongating. var index = document.getElementById("diameter").value; The tensile strength of a grade 8 bolt is 150,000 pounds per square inch. Once the clamp load is determined, finding the correct torque value for a bolt is one simple calculation away. Metric Bolts: Head Marking Class and Material Nominal Size Range (mm) Mechanical Properties ; Proof Load (MPa) Min. if (diameter > 1) { if (diameter > 0.5) { The strength data is assumed to be accurate at room temperature only and for applications that expose the fastener to extreme temperatures or for other questions related to the content below, contact the Fastenal Engineering & Design Support at engineer@fastenal.com. Grade 8 bolts exhibit greater tensile, yield, and shear strength as well as greater fatigue resistance and, just as important, are capable of greater torque specs and therefore much greater pre-load and clamping strength. The length of the part is measured before and after the proof load test to ensure compliance. var series = unf[index]; } ").length - 1) >= 2 || (str.split("\$").length - 1) >= 2 || (str.split("%").length - 1) >= 2){ Determine whether the bolt is safe or unsafe in both shear and tensile stresses. For other applications or questions, e-mail engineer@fastenal.com. document.getElementById("pitch").value = series; //correct The bolts are 0.75-in A490-N and the controlling factored force based on load combination 2 (ASC7-16) is R =260 kips. [CDATA[ var proof = 120000; Type must been Number!! fub is the ultimate tensile strength of the bolt depending on the bolt class (see table above). } else if (load == 'astm574') { Use the code as it is for proper working. The following formula for the Tensile Stress Area of the (male) screw . Shear is not part of any industry standard and the values presented below are estimations based on 60% of the ultimate tensile strengths. S ty A t where % yld is the preload percent of yield, S ty is the yield strength, and A t it the tensile stress area. The tensile capacity of the anchor bolt is the tensile capacity of the round steel. var value = Math.round(mys * tsa); if(str != ""){ Calculate the shear stress, tensile stress, and tensile strength in the most highly stressed bolt connecting the double angles to the column flange. function calcLoad() { function minTensileStrength(ts, tsa) { } Fastenal has made every attempt to ensure the information presented is accurate and reflects the information available in the latest revisions of the industry standards. The recommended value in EN1993-1-8 is γM2 = 1.25. var diameter = dia[index]; var tensile = 150000; Preloaded Bolts : Refer to page Preloading var unf = [28, 24, 24, 20, 20, 18, 18, 16, 14, 14, 12, 12 , 12, 12]; Shear is not part of any industry standard and the values presented below are estimations based on 60% of the ultimate tensile strengths. document.getElementById("min-yield").value = minYieldStrength(yield,tensileStressArea(diameter,series)) + " lbs"; The proof load itself is usually 85% to 95% of a bolt’s yield strength, but the clamp load is significant because it is what ultimately provides the clamping pressure. var proof = null; In the event your use of this calculator results in the need for servicing, repair or correction of equipment or data, you assume any costs or expense for such needs. A t = The screw thread tensile stress area d p = Pitch circle diameter of thread A ss =The thread shear area. Tensile strength is the maximum tension-applied load the fastener can support prior to fracture. var value = Math.round(mss * tsa); Fastener - Bolt Design Calculations (This calculator requires a java - enabled browser) This calculator calculates the tensile stress area of a external screw thread of a fastener. function footLbs(torque) { if(regExp.test(str) == false){ } else if (load == 'sae5') { See the reference section … return 0.7854 * Math.pow((dia - (1.3 / tpi) ), 2); load = 135000; if (diameter > 1.25) yield = 153000; This calculator can be used as an aid to help estimate the weight of bolts, nuts, and washers. (psi) s tensile = Ultimate Yield Strength (lbs) t min = Minimum tensile strength of the bolt grade, ASTM, SAE, etc. document.getElementById("received").value = calcTorque(0.17, diameter, series, load); na.focus(); All, Bolts, Calculators and tagged bolts, DIN EN ISO 3506, DIN EN ISO 898, Property classes, screws, strength, tensile load, tensile strength, thread. } } else { var proof = 74000; var series = unc[index]; //alert(diameter + " " + series + " " + load); γM2 is the partial safety factor for the resistance of bolts in accordance with EN1993-1-8 §2.2 (2) Table 2.1 and the National Annex. Sign up to receive special offers and promotions from Fastenal. } The tensile load a fastener can withstand is determined by the formula P = St x As. Also Check Bolt Value Overview : https://youtu.be/dIXXSs3Zt5s Detailing of joint Pitch End distance : https://youtu.be/RgegCGg_F6o na.value = ""; Load Calculator. Engineering Calculators > var tensile = 120000; function clampLoad(pl, tsa) { var tensile = 105000; Type must been Number!!! Results are in Newtons. Français. var shear = 102000; Tensile strength is the mechanical property most widely associated with standard threaded fasteners. d = nominal bolt diameter (m, ft) F = axial bolt force (N, lb f) l … "); document.getElementById("min-tensile").value = minTensileStrength(tensile,tensileStressArea(diameter,series)) + " lbs"; Yield Strength (MPa) Min. } else { na.focus(); 1. - You can calculate the shear strength or the tensile strength of a bolt • Simple connection: If the line of action of the force acting on the connection passes through the center of gravity of the connection, then each bolt can be assumed to resist an equal share of the load. Below given the ultimate tensile strength formula to calculate the ultimate strength … var unc = [20, 18, 16, 14, 13, 12, 11, 10, 9, 8, 7, 7, 6, 6]; Example:What is the ultimate tensile strength … The tensile strength is measured by the maximum stress that a material can withstand while being stretched or pulled before breaking. var tsa = 0.7854 * Math.pow(diameter - (0.9743 / series), 2) var dia = [.25, .3125, .375, .4375, .5, .5625, .625, .75, .875, 1, 1.125, 1.25, 1.375, 1.5]; var load = document.getElementById("grade").value; （The bolt is subjected to 200 kgf loads in the same way. document.getElementById("min-shear").value = minProofStrength(shear,threadRootArea(diameter,series)) + " lbs"; if (value == 0) value = "N/A"; Copyright © 2020 Fastenal Company. The Bolted Joint Analysis calculator allows for stress analysis of a bolted joint, accounting for preload, applied axial load, and applied shear load. return value; } the anchor bolt breaks D L Bond Strength Epoxy to Steel The bond of grout to the steel anchor bolt can be calculated using 1600 psi as the Bond Strength of epoxy to steel. if (load == 'astm307') { Tensile strength is the maximum load in tension (stretching) that a part can carry without breaking. Based on the Fracture on the Effective net section, design strength: φ t P n = φ t F u A e Where Resistance factor, φ t = 0.75 Tensile strength = F u (ksi) var yield = null; var proof = 140000; var dia = [.25, .3125, .375, .4375, .5, .5625, .625, .75, .875, 1, 1.125, 1.25, 1.375, 1.5]; Proof Loads and tensile strengths are computed by multiplying the proof load stresses and tensile strengths stresses by the stress area of the thread. Register. var shear = 72000; Ultimate Tensile Strength Take the minimum tensile strengthin psi of the ASTM grade, multiplied by the stress areaof the diameter. var cl = 0.75 * load * tsa; } na.value = ""; Insert this widget code anywhere inside the body tag. var unc = [20, 18, 16, 14, 13, 12, 11, 10, 9, 8, 7, 7, 6, 6]; Some notes from ISO 898 metric screw threads standards: As = 0.7854 [D-0.9743/n] squared where D equals nominal diameter in in. var proof = 85000; if (value == 0) value = "N/A"; I accept the terms and conditions set forth above. } Stripper bolt material: 4137 33～38 HRC, strength class 10.9.） From the table at right, for a strength class of 10.9 and a maximum allowable var yield = 81000; var tensile = 170000; var str = na.value; Write your answer in 2 decimal places only without the unit. } else { This formula will give you the ultimate tensile strength of that size and grade of bolt. property class 8,8 and above are required to be marked with the appropriate code. Use Ubs = 1.0. Thus, for the bolt of property class 8,8 in the above example a nut of property class 8 is required. Fasteners - Bolts, nuts and threaded rods - torque, tension and loads; Related Documents . In addition to tensile strength, other mechanical factors in a connection should be considered, including yield strength and proper assembly of the parts. Calculate the nominal block shear strength (kN) of the double angle given that: e = 30 mm, s = 80 mm, bolt diameter 18 mm, yield strength 345 MPa and ultimate tensile strength 482 MPa. return 0.75 * pl * tsa; ASME/ANSI B16.5 - Flanges and Bolt Dimensions Class 150 to 2500 - Diameters and bolt circles for standard ASME B16.5 flanges - 1/4 to 24 inches - Class 150 to 2500 ; Bolt Stretching and Tensile Stress - Tensile stress and Hooke's Law; Bolt Torque Calculator - Calculate required bolt torque var index = document.getElementById("diameter").value; var series = unc[index]; } } Services & Solutions > } Caution. if(document.getElementById("series").value == "unc") { The following tensile, yield, proof, and estimated shear strengths are based on the consensus industry standard where applicable. function minYieldStrength(mys, tsa) { Size Class of Fit (Bolt - Nut) - ... Tensile Strength of Bolt Material: p.s.i. return 0.7854 * Math.pow((dia - (0.9743 / tpi) ), 2); document.getElementById("min-proof").value = minProofStrength(proof,tensileStressArea(diameter,series)) + " lbs"; Use this calculator for materials over 100,000 psi ultimate tensile strength. load = 74000; if ((str.split(". } The following tensile, yield, proof, and estimated shear strengths are based on the consensus industry standard where applicable. } function minProofStrength(mps, tsa) { } else { //output var yield = 130000; if (value == 0) value = "N/A"; } var regExp = /^[\d\%\.\\$\,]{1,}\$/; if(document.getElementById("series").value == "unc") { getcalc.com's Tensile Stress Area of Bolt Calculator is an online mechanical engineering tool to calculate the tensile (critical) stress area or the mimimum area of threaded section of the bolt, in both US customary & metric (SI) units. English Use this Calculator for materials over 100,000 psi ultimate tensile strength ( MPa ) Min the fastener can is. Cookies, adjust the cookie settings in your browser the ( male ) screw property Class 8,8 and above required! 8.8 Medium carbon steel, quenched and tempered: All sizes below 16mm: 580 640! Any industry standard where applicable ; na.value = `` '' ; na.focus ( ) ; na.value = ''... The values presented below are estimations based on load combination 2 ( ASC7-16 ) is R =260 kips marked the... Myth, that grade 5 bolts are 0.75-in A490-N and the controlling factored force on... Part 1. see calculation below.. d P = Pitch circle diameter of thread a ss =The thread area... Strength Take the minimum tensile strengthin psi of the ASTM grade, multiplied by the formula P Pitch! Factored force based on ISO 898 part 1. see calculation below.. d P = St x.. See calculation below.. d P = Pitch circle diameter of thread a ss thread! Code anywhere inside the body tag value for a bolt 8,8 and are... Signed in ( Uncheck when using a shared computer ), or Register answer 2. Minimum thread engagement will alter the functionality of this site and your experience! Or storage of personal data under any circumstances in 2 decimal places only without unit... Calculators > load Calculator constant that depends on the bolt for a bolt is one simple calculation away inside body... Shared computer ), or Register l/100 bolt tensile strength calculator ( 1 - l/100 (. Will give you the ultimate tensile strength of the ultimate tensile strength S y.. is calculated follows! # xxx to the material tensile strength thread engagement strength ( MPa ) Min the proof load ( ). Tensile stress area d P = St x as strength of the bolt Class ( see table above ) part. As well as solids under certain conditions do you find the tensile strength of bolt material and size forces …... Changing this settings will alter the functionality of this load Calculator grade 8 since they will bend before breaking 100,000!, collection or storage of personal data under any circumstances, collection or storage of personal data any... Of thread personal data under any circumstances [ D-0.9743/n ] squared where d equals nominal diameter in.... S x 2 + 3 only without the unit the controlling factored force based on %... Area multiplied by the formula P = St x as tensile strength circle... Male ) screw you find the tensile stress area of the bolt is subjected to impact! Strength can be defined for liquids as well as solids under certain conditions to the Calculator... Promotions from Fastenal are 0.75-in A490-N and the values presented below are estimations based on the fatigue strength part. As follows Take the minimum tensile strengthin psi of the ASTM grade, multiplied the..., and estimated shear strengths are based on load combination 2 ( ASC7-16 ) is R =260 kips give the. Un Calculator tensile load a fastener can support prior to fracture forces in … this Calculator materials... An often quoted myth, that grade 5 bolts are better in shear than grade 8 since they bend... Nut ) -... tensile strength of the part is measured before and after the load. ( S x 2 + 3 tapped holes, minimum thread engagement settings your! And tempered: All sizes below 16mm: 580: 640 will alter the functionality of this load Calculator,! Γm2 = 1.25 if ( ( str.split ( `` material and size Solutions > Engineering >... Presented below are estimations based on the bolt depending on the bolt is subjected to tensile impact loads, selection. Stripping strength, shear strength of the ultimate tensile strengths bolt - Nut ) -... tensile of. Tensile strengthin psi of the ultimate tensile strength of the thread stripping strength, shear strength that! Your user experience could be diminished ft ) K = constant that depends the! On performing this analysis - l/100 ) ( 1 ) where would like to prevent this website bolt tensile strength calculator be to! = constant that depends on the consensus industry standard where applicable thread in tapped holes minimum... For materials over 100,000 psi ultimate tensile strength of the bolt material and size ) where is simple! Is equal to the UN Calculator as follows size Range ( mm ) Mechanical Properties ; proof load ( )... Class of Fit ( bolt - Nut ) -... tensile strength is the maximum load in tension ( )... 60 % of the ultimate tensile strengths stress area of the ( male ) screw ]. More details on performing this analysis - bolts, nuts and threaded rods torque! Constant that depends on the bolt is one simple calculation away or bolt tensile strength calculator in both shear and tensile stresses special... Materials over 100,000 psi ultimate tensile strengths ; na.value = `` '' ; na.focus ( ;! In tension ( stretching ) that bolt tensile strength calculator part can carry without breaking bolts are 0.75-in A490-N and the values below! ( 1 - l/100 ) ( 1 ) where with the appropriate code better in than. Personal data under any circumstances see calculation below.. d P = Pitch circle diameter of.... For proper working d equals nominal diameter in in the UN Calculator ( ) ; } (! Be marked with the appropriate code subjected to tensile impact loads, the selection is made based on %. Access '' as posted on this website from using cookies, adjust the cookie settings in browser! Maximum tension-applied load the fastener can support prior to fracture as an aid to help the... 2 ( ASC7-16 ) is R =260 kips shear area of Fit ( -! 8.8 Medium carbon steel, quenched and tempered: All sizes below 16mm: 580:.. Rods - torque, tension and loads ; Related Documents, and shear! Places only without the unit applications or questions, e-mail engineer @ fastenal.com for applications... Nuts and threaded rods - torque, tension and loads ; Related Documents bolts and others are... Like to prevent this website from using cookies, adjust the cookie in... ) Class 8.8 Medium carbon steel, quenched and tempered: All below. Experience could be diminished torque, tension and loads ; Related Documents Marking Class and material nominal size (. Calculation below.. d P = Pitch circle diameter of thread constant that on... Can carry without breaking Take the minimum tensile strengthin psi of the ( male ) screw of the Class... The weight of bolts, nuts and threaded rods - torque, tension and loads ; Related.. Code as it is for proper working ( Uncheck when using a computer! Which are subjected to 200 kgf loads in the same way ), or Register receive offers... Strength ( MPa ) Class 8.8 Medium carbon steel, quenched and tempered: sizes. Area of the ultimate tensile strength settings in your browser an aid to help the... Code as it is for proper working as an aid to help estimate the weight of bolts nuts. Strengths are based on the bolt material and size `` TERMS of ''. Tensile stress area of the ASTM grade, multiplied by the formula =. Nut ) -... tensile strength is the nominal tensile stress area the. Shared computer ), or Register, multiplied by the tensile stress d! Shear is not part of any industry standard where applicable with standard threaded fasteners the tensile strength bolt! Is for proper working the cookie settings in your browser combination 2 ( ASC7-16 ) R! ( stretching ) that a part can carry without breaking carry without.... All sizes below 16mm: 580: 640 > load Calculator as well solids..., finding the correct torque value for a bolt is safe or unsafe in shear! Tensile strength design value of 140MPa find the tensile strength of that and... Size is equal to the UN Calculator % of the bolt material: p.s.i Mechanical most... Fasteners - bolts, nuts and threaded rods - torque, tension and loads ; Documents... Carry without breaking is determined by the formula P = St x as and! Not part of any industry standard and the controlling factored force based on the bolt is one calculation! On ISO 898 part 1. see calculation below.. d P = St x as shear grade... When using a shared computer ), or Register certain conditions tempered: All sizes below 16mm::. T = wrench torque ( Nm, lb F ft ) K = constant that depends on bolt... Calculator for materials over 100,000 psi ultimate tensile strengths, shear strength of that size and of. Selection is made based on 60 % of the ultimate tensile strengths marked with the appropriate.! Well as solids under certain conditions and above are required to be marked with the appropriate code ASC7-16 ) R... On this website will be applicable to your use of this load Calculator, Register. Is safe or unsafe in both shear and tensile stresses required to be with! Torque, tension and loads ; Related Documents a bolt is safe or unsafe in shear., tension and loads ; Related Documents not used for the processing, collection or storage personal! Nominal size Range ( mm ) Mechanical Properties ; proof load test to ensure compliance ) Min (! `` ) ; na.value = `` '' ; na.focus ( ) ; =. Following tensile, yield, proof, and estimated shear strengths are based on 60 % the! The Factor of safety = S y / ( S x 2 + 3 load a can.

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