1、Designation: F959/F959M 17F959/F959M 17aStandard Specification forCompressible-Washer-Type Direct Tension Indicators forUse with Structural Fasteners, Inch and Metric Series1This standard is issued under the fixed designation F959/F959M; the number immediately following the designation indicates the
2、 yearof original adoption or, in the case of revision, the year of last revision. A number in parentheses indicates the year of last reapproval.A superscript epsilon () indicates an editorial change since the last revision or reapproval.1. Scope*1.1 This specification covers the requirements for com
3、pressible-washer-type direct tension indicators, (DTIs) capable ofindicating the achievement of a specified minimum tension in a structural bolting assembly.1.2 Eight types of DTIs in nominal diameter sizes 12 through 1 12 in. as well as M16 through M36 are covered:1.2.1 Type 325-1DTIs for use with
4、Specification F3125 Grade A325 Type 1 bolts or Grade F1852 assemblies.1.2.2 Type 3253DTIs for use with Specification F3125 Grade A325 Type 3 bolts or Grade F1852 Type 3 assemblies.1.2.3 Type 4901DTIs for use with Specification F3125 Grade A490 Type 1 bolts or Grade F2280 assemblies.1.2.4 Type 4903DT
5、Is for use with Specification F3125 Grade A490 Type 3 bolts Grade F2280 Type 3 assemblies.1.2.5 Type 8.8-1DTIs for use with Specification F3125 Grade A325M Type 1 bolts.1.2.6 Type 8.8-3DTIs for use with Specification F3125 Grade A325M Type 3 bolts.1.2.7 Type 10.9-1DTIs for use with Specification F31
6、25 Grade A490M Type 1 bolts.1.2.8 Type 10.9-3DTIs for use with Specification F3125 Grade A490M Type 3 bolts.1.3 DTIs are intended for installation with the protrusions against a hardened surface such as a bolt head, a hardened nut, ora hardened washer. (See Research Council on Structural Connections
7、: Specification for Structural Joints Using HighStrengthBolts.)1.4 This specification provides for furnishing Type 3 DTIs to a Chemical Composition Requirement or a Corrosion ResistanceIndex (CRI) at the manufacturers discretion.1.5 Terms used in this specification are defined in Terminology F1789 u
8、nless otherwise specified.1.6 The values stated in either SI units or inch-pound units are to be regarded separately as standard. The values stated in eachsystem may not be exact equivalents; therefore, each system shall be used independently of the other. Combining values from thetwo systems may re
9、sult in non-conformance with the standard.1.7 The following precautionary statement pertains only to the test method portions, Section 10 and Appendix X1 of thisspecification: This standard does not purport to address all of the safety concerns, if any, associated with its use. It is theresponsibili
10、ty of the user of this standard to establish appropriate safety safety, health, and healthenvironmental practices anddetermine the applicability of regulatory limitations prior to use.1.8 This international standard was developed in accordance with internationally recognized principles on standardiz
11、ationestablished in the Decision on Principles for the Development of International Standards, Guides and Recommendations issuedby the World Trade Organization Technical Barriers to Trade (TBT) Committee.2. Referenced Documents2.1 ASTM Standards:2A325 Specification for Structural Bolts, Steel, Heat
12、Treated, 120/105 ksi Minimum Tensile Strength (Withdrawn 2016)3A325M Specification for Structural Bolts, Steel, Heat Treated 830 MPa Minimum Tensile Strength (Metric) (Withdrawn 2016)3A490 Specification for Structural Bolts, Alloy Steel, Heat Treated, 150 ksi Minimum Tensile Strength (Withdrawn 2016
13、)31 This specification is under the jurisdiction of ASTM Committee F16 on Fasteners and is the direct responsibility of Subcommittee F16.02 on Steel Bolts, Nuts, Rivetsand Washers.Current edition approved April 15, 2017Dec. 1, 2017. Published May 2017February 2018. Originally approved in 1985. Last
14、previous edition approved in 20152017 asF959 15.F959 17. DOI: 10.1520/F0959-17.10.1520/F0959-17A.2 For referencedASTM standards, visit theASTM website, www.astm.org, or contactASTM Customer Service at serviceastm.org. For Annual Book of ASTM Standardsvolume information, refer to the standards Docume
15、nt Summary page on the ASTM website.3 The last approved version of this historical standard is referenced on www.astm.org.This document is not an ASTM standard and is intended only to provide the user of an ASTM standard an indication of what changes have been made to the previous version. Becauseit
16、 may not be technically possible to adequately depict all changes accurately, ASTM recommends that users consult prior editions as appropriate. In all cases only the current versionof the standard as published by ASTM is to be considered the official document.*A Summary of Changes section appears at
17、 the end of this standardCopyright ASTM International, 100 Barr Harbor Drive, PO Box C700, West Conshohocken, PA 19428-2959. United States1A490M Specification for High-Strength Steel Bolts, Classes 10.9 and 10.9.3, for Structural Steel Joints (Metric) (Withdrawn2016)3A1059 Specification for Zinc All
18、oy Thermo-Diffusion Coatings (TDC) on Steel Fasteners, Hardware, and Other ProductsB695 Specification for Coatings of Zinc Mechanically Deposited on Iron and SteelF436/F436M Specification for Hardened Steel Washers Inch and Metric DimensionsF606/F606M Test Methods for Determining the Mechanical Prop
19、erties of Externally and Internally Threaded Fasteners,Washers, Direct Tension Indicators, and RivetsF1470 Practice for Fastener Sampling for Specified Mechanical Properties and Performance InspectionF1789 Terminology for F16 Mechanical FastenersF1852 Specification for “Twist Off” Type Tension Contr
20、ol Structural Bolt/Nut/WasherAssemblies, Steel, Heat Treated, 120/105ksi Minimum Tensile Strength (Withdrawn 2016)3F2280 Specification for “Twist Off” Type Tension Control Structural Bolt/Nut/Washer Assemblies, Steel, Heat Treated, 150 ksiMinimum Tensile Strength (Withdrawn 2016)3F3125 Specification
21、 for High Strength Structural Bolts, Steel and Alloy Steel, Heat Treated, 120 ksi (830 MPa) and 150 ksi(1040 MPa) Minimum Tensile Strength, Inch and Metric DimensionsG101 Guide for Estimating the Atmospheric Corrosion Resistance of Low-Alloy Steels2.2 Research Council on Structural Connections:4Spec
22、ification for Structural Joints Using HighStrength Bolts2.3 ASME Standard:5ASME B18.2.6 Fasteners for Use in Structural ApplicationsASME B18.2.6M Fasteners for Use in Structural Applications3. Ordering Information3.1 Orders for DTIs under this specification shall include the following:3.1.1 Quantity
23、 (number of pieces);3.1.2 Name of product (DTI);3.1.3 Size, that is, nominal diameter;3.1.4 ASTM designation and year of issue (if not specified, current issue shall be used);3.1.5 Type required, 325-1, 325-3, 490-1, 490-3, 8.8-1, 8.8-3, 10.9-1, 10.9-3 (see 1.2);3.1.6 Coating type, if required (4.4)
24、;3.1.7 Source inspection, if required (Section 11);3.1.8 Test reports, if required (Section 13); and3.1.9 Any special requirements.4. Materials and Manufacture4.1 Steel used in the manufacture of DTIs shall be produced by the basic-oxygen or electric-furnace process.4.2 Design:4.2.1 DTIs shall have
25、a configuration produced by extrusion, punching, pressing, or similar forming, to permit a measurabledecrease in thickness when placed in compression.4.2.2 The design shall be such that the degree of plastic deformation shall indicate the tension in a tightened structural bolt.Supplementary indicati
26、ons of tension are permissible.4.3 Heat Treatment:4.3.1 The heat treatment of DTIs is optional at the manufacturers discretion, provided the DTIs meet all of the mechanical andperformance requirements.4.3.2 If heat treatment is performed, the process shall be through-hardening by heating to a temper
27、ature above the uppertransformation temperature, quenching in a liquid medium, and tempering by reheating to not less than 800F/427C.800 F427 C.4.4 Protective Coatings:4.4.1 Unless otherwise specified, the DTIs shall be furnished “plain” with the “as fabricated” surface finish without protectivecoat
28、ings.4.4.2 When “zinc coated” or “galvanized” is specified, the DTIs shall be zinc coated by the mechanical deposition process inaccordance with the requirements of Class 55 of Specification B695, or the DTIs shall be zinc coated by the thermal diffusionprocess in accordance with the requirements of
29、 Class 25 of Specification A1059.4 Available from Research Council on Structural Connections at www.boltcouncil.org.5 Available from American Society of Mechanical Engineers (ASME), ASME International Headquarters, Three Park Ave., New York, NY 10016-5990, http:/www.asme.org.F959/F959M 17a24.4.3 Oth
30、er coatings are to be used only when approved by the DTI manufacturer.5. Chemical Composition5.1 DTIs shall conform to the full Heat Analysis specified in Table 1 or the requirements of 5.2.5.1.1 For all types furnished to the chemical compositions in Table 1, Product Analysis may be made by the pur
31、chaser fromfinished DTIs representing each lot. The chemical composition shall conform to the requirements given in Table 1, ProductAnalysis.5.2 Type 3 products having Copper, Phosphorus, and Sulfur conforming to Table 1 and a Corrosion Resistance Index of 6 orhigher calculated on the basis of the H
32、eat Analysis as described in Guide G101 shall be considered acceptable. See Note 1.NOTE 1The user is cautioned that the Guide G101 predictive equation for calculation of an atmospheric corrosion index has been verified only forthe composition limits stated in that guide.5.2.1 Product Analyses are no
33、t applicable to Type 3 indicators furnished to a CRI of 6 or higher. Acceptance shall be based onthe CRI of 6 or higher calculated from the Heat Analysis. Other specified Type 3 Steels with Copper, Phosphorus, and Sulfurconforming to the specified limits and a Corrosion Resistance of 6 or higher, ar
34、e acceptable in lieu of compliance with the fullspecified Chemical Compositions.6. Performance Requirements6.1 Compression LoadsWhen the gap of inch series DTIs are compressed to 0.015 in. or metric series DTIs to 0.4 mm, thecompression load shall conform to the requirements specified in Table 2.6.2
35、 HardnessWhen DTIs are heat-treated in accordance with 4.3.2, the maximum hardness shall be HRC37.7. Dimensions7.1 Except as permitted by 7.1.1 and 7.1.2 the DTIs shall conform to the dimensional and related requirements ofASME B18.2.6 for inch series and ASME B18.2.6M for metric series products.7.1
36、.1 At the manufactures discretion, the number of protrusions may be altered provided there are no fewer than fourprotrusions and the performance requirements of Section 6 are maintained.7.1.2 The minimum outside diameter of the DTIs may alternatively match the minimum outside diameter requirements o
37、f thematching nominal size ASTM F436/F436M washer.8. Workmanship, Finish, and Appearance8.1 The DTIs shall be commercially smooth and free of injurious material or manufacturing defects that would affect theirperformance.9. Number of Tests and Retests9.1 Responsibility:9.1.1 The DTI manufacturer sha
38、ll inspect each lot of DTIs prior to shipment in accordance with the quality assurance proceduresdescribed in 9.2.9.1.2 The purchaser is required to maintain the identification and integrity of each lot following delivery until the product isinstalled in its service application.9.2 Production Lot Me
39、thod:TABLE 1 Chemical Composition RequirementsElementComposition, %HeatAnalysisProductAnalysisType 1 Series Type 3 SeriesA Type 1 Series Type 3 SeriesACarbon 0.300.55 . 0.270.58 .Manganese 0.500.90 . 0.470.93 .Phosphorus, Max 0.04 0.040 0.048 0.045Sulfur, Max 0.045 0.050 0.053 0.055Sulfur, Max 0.05
40、0.050 0.053 0.055Silicon 0.150.35 0.150.35 0.130.37 0.130.37Silicon . 0.150.35 . 0.130.37Chromium . 0.450.65 . 0.420.68Nickel . 0.250.45 . 0.220.48Copper . 0.250.45 . 0.220.48A Type 3 DTIs are also permitted to be manufactured from any of theType 3 steels in the chemical composition sections of Spec
41、ification F3125. Unless otherwise specified,the manufacturer may use Type 3 steel to produce Type 1 product.F959/F959M 17a39.2.1 All DTIs shall be processed in accordance with a lot identification controlquality assurance plan. The manufacturer shallidentify and maintain the integrity of each produc
42、tion lot of DTIs from raw material selection through all processing operationsand treatments to final packing and shipment. Each lot shall be assigned its own lot-identification number, each lot shall be tested,and the inspection test reports for each lot shall be retained.9.2.2 The minimum number o
43、f samples to be tested to determine compression loads and coating thickness (when applicable)shall be in accordance with the requirements specified in Guide F1470.9.3 Number of Tests After AlterationsIf DTIs are heat treated, coated, or otherwise altered by a subcontractor or manufacturersubsequent
44、to testing, they shall be tested in accordance with 9.2 prior to shipment to the purchaser after all alterations have beencompleted.9.4 When Type 3 products are furnished to a Corrosion Resistance Index, the CRI number shall be calculated for each lot.10. Test Methods10.1 Compression load tests shal
45、l be conducted in accordance with Test Methods F606/F606M.10.1.1 All test specimens shall conform to the values given in Table 2, regardless of surface coating (lubricants included).10.2 DTIs for tests shall be tested full size “as received” without any special preparation.10.3 Results from routine
46、hardness tests performed during production of heat-treated DTIs satisfy the requirement forverification that product hardness does not exceed HRC37.10.4 The Corrosion Resistance Index shall be calculated for the Heat Analysis in accordance with Guide G101 PredictiveMethod based on the data of Larabe
47、e and Coburn.11. Inspection11.1 If the inspection described in 11.2 is required by the purchaser, it shall be specified in the inquiry and contract or order.11.2 The purchasers quality assurance representative shall have free entry to all parts of the manufacturers works that concernthe manufacture
48、of the DTIs ordered. The manufacturer shall afford the quality assurance representative all reasonable facilitiesto satisfy him that the DTIs are being furnished in accordance with this specification. All tests and inspections required by thisspecification that are requested by the purchasers repres
49、entative shall be made before shipment and shall be conducted so as notto interfere unnecessarily with the operation of the plant.12. Rejection12.1 DTIs that fail to conform to the requirements of this specification shall be rejected. Rejection should be reported to theproducer or supplier promptly and in writing. In case of dissatisfaction with the results of the test, the producer or supplier maymake claim for a rehearing.TABLE 2 Acceptable Range of Compression LoadsDTI Size (Nominal Diameter,in.)Compression Load Range in Thous
