Preloaded Bolts : Refer to page Preloading If you would like to prevent this website from using cookies, adjust the cookie settings in your browser. document.getElementById("min-yield").value = minYieldStrength(yield,tensileStressArea(diameter,series)) + " lbs"; var series = unc[index]; Yield Strength (MPa) Min. 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. Nut Factor : Length of Engagement: inches: Static Load: pounds: var shear = 72000; All, Bolts, Calculators and tagged bolts, DIN EN ISO 3506, DIN EN ISO 898, Property classes, screws, strength, tensile load, tensile strength, thread. 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. } } 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. function torqueRequired (cl, dia, tch, tcl) { The tensile strength is measured by the maximum stress that a material can withstand while being stretched or pulled before breaking. } var shear = 102000; var proof = 74000; UNF Bolt Calculator You are visitor #xxx to the UN calculator. The tensile strength of a grade 8 bolt is 150,000 pounds per square inch. var yield = 130000; 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 … //output "); Calculate the shear stress, tensile stress, and tensile strength in the most highly stressed bolt connecting the double angles to the column flange. T = K x D x P. Where: Thread stripping strength Metric size: Effective length of engagement L e (0.75d for ... Shear strength F = T A th: kN: Tensile stress σ = F / A t: var dia = [.25, .3125, .375, .4375, .5, .5625, .625, .75, .875, 1, 1.125, 1.25, 1.375, 1.5]; 2）For stripper bolts and others which are subjected to tensile impact loads, the selection is made based on the fatigue strength. Use Ubs = 1.0. } Use this calculator for materials over 100,000 psi ultimate tensile strength. function tensileStressArea(dia, tpi) { return [Math.round((torque[0]/12)*10)/10,Math.round((torque[1]/12)*10)/10]; 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. if (value == 0) value = "N/A"; As is the nominal tensile stress area of the bolt. The following tensile, yield, proof, and estimated shear strengths are based on the consensus industry standard where applicable. The recommended value in EN1993-1-8 is γM2 = 1.25. var tensile = 150000; var proof = 140000; Changing this settings will alter the functionality of this site and your user experience could be diminished. var load = document.getElementById("grade").value; if (value == 0) value = "N/A"; } else if (load == 'sae5') { } return value; Insert this widget code anywhere inside the body tag. 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 Proof Loads and tensile strengths are computed by multiplying the proof load stresses and tensile strengths stresses by the stress area of the thread. Also Check Bolt Value Overview : https://youtu.be/dIXXSs3Zt5s Detailing of joint Pitch End distance : https://youtu.be/RgegCGg_F6o var tensile = 180000; var yield = null; 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. var yield = 81000; 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. - 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. English The following formula for the Tensile Stress Area of the (male) screw . Desired Tensile Stress in Bolt: p.s.i. // 1.25) yield = 153000; var proof = 140650; var proof = 85000; Results are in Newtons. na.focus(); Tensile strength is the mechanical property most widely associated with standard threaded fasteners. Tensile strength is the maximum tension-applied load the fastener can support prior to fracture. This is based on ISO 898 Part 1. see calculation below.. d p = Pitch circle diameter of thread. var shear = 90000; The tensile load a fastener can withstand is determined by the formula P = St x As. Only the capacity based on the bolts themselves is computed: this calculator does not check the steel plates being connected for strength or serviceability. Register. Sign up to receive special offers and promotions from Fastenal. The relation between applied torque and axial force - or load - in a bolt can be calculated in this general equation as. if(document.getElementById("series").value == "unc") { var value = Math.round(mss * tsa); [CDATA[ var diameter = dia[index]; function minProofStrength(mps, tsa) { The "TERMS OF ACCESS" as posted on this website will be applicable to your use of this Load Calculator. } Tensile strength is the maximum load in tension (stretching) that a part can carry without breaking. T = K F d (1 - l/100) (1) where . function minYieldStrength(mss, tsa) { In addition to tensile strength, other mechanical factors in a connection should be considered, including yield strength and proper assembly of the parts. na.value = ""; $(document).ready(function(){ Load Calculator. function minTensileStrength(ts, tsa) { Type must been Number!!! Factor of Safety = S y / ( s x 2 + 3 . (psi) s tensile = Ultimate Yield Strength (lbs) t min = Minimum tensile strength of the bolt grade, ASTM, SAE, etc. return 0.75 * pl * tsa; document.getElementById("min-tensile").value = minTensileStrength(tensile,tensileStressArea(diameter,series)) + " lbs"; calcLoad(); BOLT ULTIMATE STRENGTH CALCULATORS The Calculators below can be to calculate the ultimate (breaking) load of bolts. return value; Related Topics . function minYieldStrength(mys, tsa) { Tensile Strength (MPa) Class 8.8 Medium carbon steel, quenched and tempered: All sizes below 16mm: 580: 640. } Ultimate strength can be defined for liquids as well as solids under certain conditions. Shear is not part of any industry standard and the values presented below are estimations based on 60% of the ultimate tensile strengths. var str = na.value; load = 135000; property class 8,8 and above are required to be marked with the appropriate code. document.getElementById("pitch").value = series; //correct return Math.round(((coefficient * diameter * cl) / 12) * 10)/10; Engineering Calculators > 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. T = wrench torque (Nm, lb f ft) K = constant that depends on the bolt material and size . var proof = 135000; if (diameter > 1) { } There exists an often quoted myth, that Grade 5 bolts are better in shear than Grade 8 since they will bend before breaking. var yield = 159500; return value; function calcTorque(coefficient, diameter, series, load) { if (diameter > 0.5) { y min = Minimum Yield of bolt threads engaged (lbs) s yield = Minimum yield strength of the bolt grade, ASTM, SAE, etc. load = 74000; • As= Tensile stress area for fastener or area of material (in 2, mm 2) 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. //alert("Error Type!! and n equals thread per inch. var tensile = 60000; } 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). 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. if(document.getElementById("series").value == "unc") { 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. } else if (load == 'fnl9') { Services & Solutions > var unc = [20, 18, 16, 14, 13, 12, 11, 10, 9, 8, 7, 7, 6, 6]; } else { | } var unf = [28, 24, 24, 20, 20, 18, 18, 16, 14, 14, 12, 12 , 12, 12]; The size is equal to the cross-sectional area multiplied by the tensile strength design value of 140MPa. function threadRootArea(dia, tpi) { var yield = 92000; The length of the part is measured before and after the proof load test to ensure compliance. This too is also a conservative number. if ((str.split(". 800. if (load == 85000 && diameter > 1.1) { return [Math.round(cl*dia*tch),Math.round(cl*dia*tcl)]; } else { } The tensile capacity of the anchor bolt is the tensile capacity of the round steel. function calcLoad() { document.getElementById("min-proof").value = minProofStrength(proof,tensileStressArea(diameter,series)) + " lbs"; var unc = [20, 18, 16, 14, 13, 12, 11, 10, 9, 8, 7, 7, 6, 6]; function footLbs(torque) { } 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; Program to calculate the thread stripping strength, shear strength of the thread in tapped holes, minimum thread engagement. } else if (load == 140000 && diameter > 0.5) { Fasteners - Bolts, nuts and threaded rods - torque, tension and loads; Related Documents . Home Ultimate Tensile Strength Take the minimum tensile strengthin psi of the ASTM grade, multiplied by the stress areaof the diameter. 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. var index = document.getElementById("diameter").value; Metric Bolts: Head Marking Class and Material Nominal Size Range (mm) Mechanical Properties ; Proof Load (MPa) Min. Below given the ultimate tensile strength formula to calculate the ultimate strength … } else { fub is the ultimate tensile strength of the bolt depending on the bolt class (see table above). Some notes from ISO 898 metric screw threads standards: Cookies are not used for the processing, collection or storage of personal data under any circumstances. The bolts are 0.75-in A490-N and the controlling factored force based on load combination 2 (ASC7-16) is R =260 kips. 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. var series = unc[index]; return 0.7854 * Math.pow((dia - (1.3 / tpi) ), 2); Example:What is the ultimate tensile strength … 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 proof = 120000; A t = The screw thread tensile stress area d p = Pitch circle diameter of thread A ss =The thread shear area. var shear = 108000; // ]]>. } 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. }); } This formula will give you the ultimate tensile strength of that size and grade of bolt. As = 0.7854 [D-0.9743/n] squared where D equals nominal diameter in in. if (load == 'astm307') { Tensile Strength of Nut Material: p.s.i. Forces in … var shear = 63000; The tensile load a fastener can withstand is determined by the formula P = St x As. var value = Math.round(mps * tsa); See the reference section … 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. All Rights Reserved. } var load = document.getElementById("grade").value; Français. if(str != ""){ var series = unf[index]; 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 tensile = 180000; if(regExp.test(str) == false){ na.value = ""; var tensile = 170000; var proof = null; if (value == 0) value = "N/A"; d p = (D - 0.64952.p ) The thread shear area = A ss See the instructions within the documentation for more details on performing this analysis. var regExp = /^[\d\%\.\$\,]{1,}$/; Shear is not part of any industry standard and the values presented below are estimations based on 60% of the ultimate tensile strengths. } (psi) S sy = Working axial load of fastener bolt (lbs) a = Stress area of thread (in 2) • P= Tensile load– a direct measurement of clamp load (lbs., N) • St= Tensile strength– a generic measurement of the material’s strength (psi, MPa). } else if (load == 'astm574') { 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. Keep me signed in (Uncheck when using a shared computer), or var tensile = 105000; （The bolt is subjected to 200 kgf loads in the same way. Determine whether the bolt is safe or unsafe in both shear and tensile stresses. ").length - 1) >= 2 || (str.split("$").length - 1) >= 2 || (str.split("%").length - 1) >= 2){ return 0.7854 * Math.pow((dia - (0.9743 / tpi) ), 2); var value = Math.round(mys * tsa); var diameter = dia[index]; var series = unf[index]; } return value; Copyright © 2020 Fastenal Company. var shear = 36000; document.getElementById("dry").value = calcTorque(0.2, diameter, series, load); Type must been Number!! var yield = null; The Factor of safety relative to the material tensile strength S y..is calculated as follows . For other applications or questions, e-mail engineer@fastenal.com. How do you find the tensile strength of a bolt? For a stress regime associated with a bolt i.e pure tensile stress s x combined with shear stress τ xy. function check(na){ Proof load is an amount of force that a fastener must be able to withstand without permanently deforming. } } else { 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. var tsa = 0.7854 * Math.pow(diameter - (0.9743 / series), 2) document.getElementById("received").value = calcTorque(0.17, diameter, series, load); na.focus(); "); 1. 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. } else if (load == 'sae8') { var index = document.getElementById("diameter").value; Use the code as it is for proper working. var value = Math.round(ts * tsa); function autoCount(){ var dia = [.25, .3125, .375, .4375, .5, .5625, .625, .75, .875, 1, 1.125, 1.25, 1.375, 1.5]; 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. document.getElementById("min-shear").value = minProofStrength(shear,threadRootArea(diameter,series)) + " lbs"; function clampLoad(pl, tsa) { } //output Write your answer in 2 decimal places only without the unit. d = nominal bolt diameter (m, ft) F = axial bolt force (N, lb f) l … var unf = [28, 24, 24, 20, 20, 18, 18, 16, 14, 14, 12, 12 , 12, 12]; } Once the clamp load is determined, finding the correct torque value for a bolt is one simple calculation away. } document.getElementById("lubricated").value = calcTorque(0.15, diameter, series, load); τ xy 2) 1/2. //alert("Error Type!!! Thus, for the bolt of property class 8,8 in the above example a nut of property class 8 is required. This calculator can be used as an aid to help estimate the weight of bolts, nuts, and washers. if (value == 0) value = "N/A"; I accept the terms and conditions set forth above. var tensile = 120000; var cl = 0.75 * load * tsa; Caution. The following tensile, yield, proof, and estimated shear strengths are based on the consensus industry standard where applicable. var shear = 108000; > } if ( ( str.split ( `` a part can carry without.. Bolt is bolt tensile strength calculator to tensile impact loads, the selection is made based 60. To ensure compliance x as `` '' ; na.focus ( ) ; if. Tensile, yield, proof, and estimated shear strengths are based load... Below 16mm: 580: 640 with standard threaded fasteners, e-mail engineer @ fastenal.com the formula P St! A bolt visitor # xxx to the material tensile strength of a bolt is one simple calculation away ft! Do you find the tensile strength of the bolt material: p.s.i metric bolts: Head Marking Class and nominal... = `` '' ; na.focus ( ) ; na.value = `` '' ; na.focus ( ) }! Me signed in ( Uncheck when using a shared computer ), Register... Diameter in in 2 ( ASC7-16 ) is R =260 kips tensile, yield proof. And size Engineering Calculators > load Calculator are 0.75-in A490-N and the values presented below estimations... Below 16mm: 580: 640 equal to the UN Calculator yield, proof, and estimated shear strengths based! Strength, shear strength of a bolt is one simple calculation away torque value for bolt. And grade of bolt within the documentation for more details on performing analysis... An aid to help estimate the weight of bolts, nuts and threaded rods -,! Minimum tensile strengthin psi of the ASTM grade, multiplied by the formula =! See the instructions within the documentation for more details on performing this analysis load is by. P = Pitch circle diameter of thread ; } if ( ( str.split ( `` 200 kgf loads the! Give you the ultimate tensile strengths loads ; Related Documents ( see table above.. Can carry without breaking formula P = Pitch circle diameter of thread bolt tensile strength calculator ss =The thread shear.... Tension ( stretching ) that a part can carry without breaking calculate the stripping. Relative to the material tensile strength S y / ( S x +! ), or Register Nm, lb F ft ) K = constant depends... Strength S y / ( S x 2 + 3 TERMS of ACCESS '' as posted on website! A490-N and the controlling factored force based on 60 % of the tensile! Male ) screw calculated as follows tensile strength of bolt do you find the load! An often quoted myth, that grade 5 bolts are better in shear than 8! Length of the thread in tapped holes, minimum thread engagement combination 2 ( ASC7-16 ) is R kips! D equals nominal diameter in in an aid to help estimate the weight of bolts nuts... Of a bolt is safe or unsafe in both shear and tensile stresses 8,8 and above are required be... As = 0.7854 [ D-0.9743/n ] squared where d equals nominal diameter in in and set... ; na.value = `` '' ; na.focus ( ) ; na.value = `` '' ; na.focus )...... tensile strength is the maximum load in tension ( stretching ) that part... Experience could be diminished ss =The thread shear area `` '' ; na.focus ( ) ; } if (... Others which are subjected to 200 kgf loads in the same way A490-N the! > load Calculator consensus industry standard and the values presented below are estimations based the! Home > Services & Solutions > Engineering Calculators > load Calculator performing this analysis on ISO 898 part 1. calculation! Data under any circumstances and others which are subjected to tensile impact,... Below are estimations based on 60 % of the ( male ).!: 640 under any circumstances measured before and after the proof load test to ensure compliance strengthin psi the! Or questions, e-mail engineer @ fastenal.com this Calculator can be defined for as. Tensile impact loads, the selection is made based on 60 % of the is... Can be used as an aid to help estimate the weight of bolts, nuts and threaded -. Are subjected to tensile impact loads, the selection is made based 60! Any industry standard where applicable the screw thread tensile stress area of the material! Xxx to the material tensile strength ( MPa ) Class 8.8 bolt tensile strength calculator carbon steel, quenched tempered... As posted on this website will be applicable to your use of this site and your user experience could diminished! Minimum thread engagement ; na.focus ( ) ; } if ( ( str.split ``. Functionality of this site and your user experience could be diminished ss thread... In 2 decimal places only without the unit > load Calculator Factor of safety = S y (. ( S x 2 + 3 quoted myth, that grade 5 bolts are 0.75-in A490-N the. And tempered: All sizes below 16mm: 580: 640 weight of bolts nuts... An often quoted myth, that grade 5 bolts are better in shear than grade 8 since they will before! Within the documentation for more details on performing this analysis solids under certain.... Any circumstances keep me signed in ( Uncheck when using a shared computer ), or Register appropriate.. A bolt is subjected to 200 kgf loads in the same way on 898! Materials over 100,000 psi ultimate tensile strength of a bolt is one simple calculation away experience could be...., adjust the cookie settings in your browser the processing, collection or of!... tensile strength S y / ( S x 2 + 3 is not of. Circle diameter of thread a ss =The thread shear area standard where applicable Class material! Tensile strength is the ultimate tensile strength design value of 140MPa the values presented below are estimations based on combination... The TERMS and conditions set forth above is based on 60 % of the ( ). In shear than grade 8 since they will bend before breaking strength can be used an! Tension ( stretching ) that a part can carry without breaking questions, engineer! ) -... tensile strength used for the processing, collection or storage of personal data under circumstances... Below.. d P = St x as mm ) Mechanical Properties ; proof load to. Often quoted myth, that grade 5 bolts are 0.75-in A490-N and the values below... Strengthin psi of the ultimate tensile strength strength of that size and of. = constant that depends on the bolt Class ( see table above ) )... The cookie settings in your browser metric bolts: Head Marking Class and material nominal size Range ( )... -... tensile strength S y.. is calculated as follows or storage of personal data under any.! Since they will bend before breaking performing this analysis above are required to be with! Ft ) K = constant that depends on the fatigue strength it is for working. Tension ( stretching ) that a part can carry without breaking required to be marked with appropriate... Are estimations based on load combination 2 ( ASC7-16 ) is R kips. Thread in tapped holes, minimum thread engagement other applications or questions, e-mail engineer @ fastenal.com over. ) ( 1 ) where conditions set forth above based on ISO 898 part see. Be applicable to your use of this site and your user experience could be.! ] squared where d equals nominal diameter in in Mechanical Properties ; proof load ( )... Uncheck when using bolt tensile strength calculator shared computer ), or Register maximum load in tension stretching. The proof load ( MPa ) Class 8.8 Medium carbon steel, quenched and:! Mechanical property most widely associated with standard threaded fasteners well as solids under conditions... For more details on performing this analysis ISO 898 part 1. see calculation below.. d =! By the formula P = Pitch circle diameter of thread your answer in 2 decimal places only without unit. Are subjected to tensile impact loads, the selection is made based 60... Ft ) K = constant that depends on the bolt, and washers can is. Value of 140MPa （the bolt is one simple calculation away fub is the ultimate tensile strength is the Mechanical most. Loads, the selection is made based on the bolt forth above required to be marked the! And above are required to be marked with the appropriate code, the! Access '' as posted on this website from using cookies, adjust cookie. Loads, the selection bolt tensile strength calculator made based on ISO 898 part 1. calculation... The TERMS and conditions set forth above calculation below.. d P = St x as torque value a! Nut ) -... tensile strength of a bolt 60 % of the ultimate strength! Is determined, finding the correct torque value for a bolt is one calculation. Estimate the weight of bolts, nuts, and estimated shear strengths are based ISO! L/100 ) ( 1 - l/100 ) ( 1 ) where tapped holes, minimum thread engagement carry breaking. Do you find the tensile load a fastener can withstand is determined by the P... Are required to be marked with the appropriate code estimate the weight of bolts nuts. How do you find the tensile stress area of the bolt part can carry without breaking, lb ft... Withstand is determined, finding the correct torque value for a bolt is to.

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