Mechanical Properties of Externally Threaded …

1 Mechanical Properties of Externally Threaded Fasteners (in.)(psi)(psi) (psi)SAE J429-Grade 11/4 - 1 1/233,00060,000B70B10036,0001/4 - 3/455,00074,000B80B10057,0007/8 - 1 1/233,00060,000B70B10036,000 ASTM A307-Grade ALow or medium carbon steel1/4 - 460,000B69B100 ASTM A563 Grade A (Hex up to 1-1/2 & Heavy Hex 1-1/2 and over)ASTM A307-Grade BLow or medium carbon steel1/4 - 460,000(min)B69B95 ASTM A563 Gra de A Heavy Hex1/4 - 185,000120,000C25C3492,0001 1/8 - 1 1/274,000105,000C19C3081,0001/4 - 185,000120,000C25C3492,0001 1/8 - 1 1/274,000105,000C19C3081,0001/4 - 185,000120,000C25C3492,0001 1/8 - 1 1/274,000105,000C19C3081,0001 3/4 - 355,00090,00058,0001/4 - 2-1/2105,000125,000C26C36109,000 Over 2-1/295,000105,000C22C3399,000 SAE J429-Grade 8M edi um carb on alloy steel: quenched & tempered1/4 - 1 1/2120,000150,000C33C39130,000 SAE J995 Grade 8 Hex1/4 - 2-1/2120,000150,000C33C39130,000 Over 2-1/2105,000140,000C31C39115,000 ASTM A490-Type 1M edi um carb on alloy steel: quenched & tempered1/2 - 1-1/2120,000150,000 (min) 173,000 (max)C33C39130,000 ASTM A563 Grade DH Heavy HexSAE J429-Grade edi um carb on boron steel: quenched & tempered1/4 - 1120,000150,000C33C39130,000 SAE J995 Grade 8 Hex#0 - 1/2140,000180,000C39C45over 1/2 - 2135,000170,000C37C45153,000#0 - 1/2145,000C39C44over 1/2 135,000C37C44 ASTM F1554 Anchor Bolt s, Steel Grade 36 Low or medium carbon steel1/4 - 4-in58,000(min) 80,000 (max)36,000 ASTM A563 Grade A (hex up to 1-1/2 & Heavy Hex 1-1/2 and over)Notes1, 2 , 3 ASTM F835 Socket Butt on& Flat Countersunk Head Cap ScrewM edi um carb on alloy steel.

2 Quenched & temperedASTM A563 Grade DH Heavy HexSAE J995 Grade 5 up to 1-1/2, ASTM A563 Grade A Heavy Hex 1-1/2 & over, DH Heavy Hex if GalvASTM A563 Grade C Heavy H ex, DH if GalvFNL Grade 9 Thick Hex NutCompatible NutsASTM A563 Grade A HexSAE J995 Grade 5 HexASTM A563 Grade C Heavy H ex, DH if GalvSize RangeMin. Proof StrengthMi n. Ten sile StrengthCore Hardness Rockw ellMin. Yiel d StrengthGrade Identification MarkingASTM A449-Type1Sp ecificationMaterialM edi um carb on steel: quenched & temperedM edi um carb on steel: quenched & temperedSAE J429-Grade 2 ASTM A325 - Type 1M edi um carb on steel: quenched & temperedLow or medium carbon steelSAE J429-Grade 5 ASTM A354- Grade BCM edi um carb on alloy steel: quenched & tempered1/4 - 1-1/4140,650 ASTM A354 Grade BDM edi um carb on alloy steel: quenched & temperedC38 ASTM A574 Socket Head Cap ScrewM edi um carb on alloy steel: quenched & temperedC42159,500180,000 FNL Grade 9M edi um carb on alloy steel: quenched & tempered 3.

3 AS TM A 19 4 2H heavy hex nut m ay be u se d in liew as a sub stitute fo r AS TM A 563 DH h eavy h ex nut 2 . G alv an iz ed n uts a re inte n de d fo r u se w it h e x terna lly th re a de d fa s te n ers th a t a re h ot-d ip or m ec ha n ic ally g alv an iz ed o r h a v e a coating of sufficient thickness to require over-tapping of the nut to provide assembly. 1. Com patible d enotes comm ercia lly a va ilable nu t ha ving suita ble me ch anical pro perties and dime nsion al co nfiguration or style wh ic h w ill m a k e it p os sible to o b ta in th e de sire d b o lt lo a d. H ig h er s tren g th nu ts m ay be a s uit ab le s u bs titu e pro v ide d b o lt st a nd a rd a llow s . Rev. 8-25-09 Mechanical Properties of Internally Threaded Fasteners PlainGalvanize coating (1) A563-Grade 01/4 - 1 1/269,000*52 ,000*B5 5C3 2 ASTM A563-Grade A1/4 - 1 1/290,000*68 ,000*B6 8C3 2100,000*75 ,000*90 ,000**68,000**ASTM A563-Grade C Heavy HexCarbon Steel, may be quenched and tempered1/4 - 4144,000B7 8C3 8 ASTM A56 3-Grade DH Heavy HexCarbon Steel, quenched and tempered1/4 - 4175,000150,000C24C3 81/4 1 1/2C24C3 5 Over 1 1/2C3 51/4 5/8C32C3 83/4 1 1/2C35C4 0 ASTM A194-Grade 8M Heavy HexAISI 3161/4 1 1/280,000B6 0C3 2 SAE J995 Grade ,000*109,000**105,000*94 ,000**1/4 5/8C24C32 Over 5/8 1C26C34 Over 1 1 1/2C26C36 Grade Identific ation Marking80,000B60C32Pr oof Lo ad Str ess (psi)RockwellHardnessSpecificationMateri alNominal Siz e( in.)

4 Proo f Load Stress (psi)8 Medium carbon or alloy steel, quenched & tempered150,0005 Carbon steel1/4 - 4 Over 1 1 1/2 GradeASTM A194-Grade 2H Heavy HexMaterialNominal Siz e( in. )FNL Grade 9 Thick Hex NutASTM A194-Grade 8 Heavy HexAISI 3041/4 1 1/2 Carbon SteelAST M A563-G ra de A Heavy HexMedium Carbon SteelCarbon Steel180,0001 75,0001/4 - 4B6 8C3 2C32C32 Grade Identification MarkingHardness Rockwell * UN C and 8 UN ** UNF, 12 UN & finer **When a zinc coated A194 2H nut is supplied, the zinc coating, overtapping, lubrication and rotational capacity testing shall be i n accorda nce with ASTM A563 and the proof stress reduced accordingly. Nuts coated with zinc sha ll have an a sterisk * marked after the grade symbol. Nuts c oated with cadmium shall have a plus sign + marked after the grade symbol. (1): Galvani ze coati ng refers to nuts that have been plated with a pl ating or c oati ng of sufficient thickness to require overt apping of the nut to provide assembly: for example hot-dip or Mechanical galvanizing.

5 Rev. 8-25-09 ASTM A193: Alloy Steel and Stainless Steel Bolting Materials for High-Temperature Service Siz e Ran geMin . Tensile StrengthMin. Yield Stren gthCore Hardness Rockwel l(i n.)(ps i)(p si)(max)2 1/2 & under125,000105,000C35 Over 2 1/2 - 4115,00095,000C35 Over 4 7 100,00075,000C354 & under100,00080,000B99 Over 4 - 7100,00075,000B992 1/2 & under125,000105,000C35 Over 2 1/2 - 4110,00095,000C35 Over 4 - 8100,00085,000C35 ASTM A193 B8 Class 11/4 & larger75,00030,000B96A 304 Stainless Steel used for high temperature applicati ons. Thi s material has been carbide sol uti on e 8 ASTM A193 B8M C lass 11/4 & larger75,00030,000B96A 316 Stainless Steel used for high temperature applicati ons. Thi s material has been carbide sol uti on de 8 MCompatible ASTM A194 Heavy Hex NutGrade 2 HGrade 2 HMGrad e 4Sp ecification & GradeDescri ptionGrade Identification MarkingASTM A193 B7 Chromium-Molybdenum alloy (4140, 4142, 4145, 4140H, 4142H, 4145H) used for high-pressure, high-temperature applications.

6 S imilar to B7 except heat -treat ed to limit the maximum hardness. Considered in areas where stress embri ttlement may be a A193 B16A chromium-Molybdenum-Vanadium alloy used for high-pressure, high-temperature service applic ations. O ffers sli ghtly higher temperat ure resistance t han A193 B7M Com pa tib le deno tes com me rcially available n ut h aving suit able mechan ical prope rt ies a nd d im ensional conf igu ra tio n or style which will make it possible t o ob tain th e de sired b olt lo ad. Hig her streng th n uts or nu ts of equa l stren gth m ay be a suitab le su bstit ute provided bolt sta ndard allows. Mechanical Properties of Common Stainless Steel Fasteners in Accordance with ASTM F593 Nominal Strength Min. Yield Str ength(in.)(psi) (psi)1100, 000 - 150, 00085,0 00 - 140, 0002100, 000 - 150, 00085,0 00 - 140, 000C3265, 000B80C3245, 000 Grade Identification Ma rking(316, 316 L)CW1/4 - 5/83/4 - 1 1/ 2B9565, 000B80C3245, 000 Sta inless Al loy GroupCondition(3 04, 304L , 305 , 384, 18-9L W, 30 2HQ)CWCore Hardness R ockwell1/4 - 5/83/4 - 1 1/ 2B95C32 Rev.

7 8-25-09 Tensile Stress, Thread Root and Thread Stripping Areas (tpi)(sq in.)(sq in)sq in per in of engagement(t pi )(sq i n.)( sq in)s q i n per in of engagement(t pi)(sq in)(s q in)sq i n pe r i n of . 002 780 .0 02 . 003 940 .0 03 . 005 230 .0 04 . 006 610 .0 05 . 008 310 .0 07 . 010 150 .0 08 1100. 19 02 40 .017 50. 01 450 .4 01320. 020 .0 17 9120. 21 62 40 .024 20. 02 060 .4 0 1/4 1 5 31 80 .052 550 .6 3 3/8 0 7 81 40 .1 .9 90 .1 09 8 1 /2 01 30 .1 00 .1 48 9 31 20 .1 30 .1 89 5 /8 51 10 .2 60 .2 39 3 /4 01 00 .3 30 .3 51 7/8 00 .4 80 080 .6 30 .6 24 1 570 .7 60 .8 11 1 070 .9 31 .0 23 3 561 .1 51 .2 60 1 061 .4 11 .5 21 St ress Are aThread Root AreaNominal SizeInt Thread Stripping Area AsnThread PitchTensile St ress AreaThread R oot AreaThread PitchF i ne Th r e adInt Thread Stripping Ar e a A sn 8 Thread S eriesCoarse ThreadInt Thread StrippingAre a Asn Thread Pitc hTensile Stress AreaThread Root Area The 1-12 is the standard inch series fine thread to the Unified screw thread system.

8 The 1-14 is considered a UNS (Unified Special). However, the majority of all 1 -in fine th rea ds man ufactur ed a re 1- 14 (UN S). Tensile Stress Area = (D - )2D = n omi nal t hr ead dia met ern = th rea ds pe r inchThre ad Ro ot Ar ea = 4( D - 1 .3 /n )2D = n omi nal t hr ead dia met ern = th rea ds pe r inchInt Thread Stripping Area per inch of Engagement = x Dsm in x n [( 1/ 2n )+0 . 577 35 (Dsmi n - Enmax) ]The values listed are for 2B internal threadsn = th rea ds pe r inchDsmin = mi nimu m ma jor d iame t er of extern al t hre adE nma x = maxim um pi tch d iam eter of in te rna l th rea d Rev. 8-25-09