ASTM A973 A973M-2001 Standard Specification for Grade 100 Alloy Steel Chain.pdf
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1、Designation: A 973/A 973M 01Standard Specification forGrade 100 Alloy Steel Chain1This standard is issued under the fixed designation A 973/A 973M; the number immediately following the designation indicates the yearof original adoption or, in the case of revision, the year of last revision. A number
2、 in parentheses indicates the year of last reapproval.A superscript epsilon (e) indicates an editorial change since the last revision or reapproval.1. Scope*1.1 This specification covers Grade 100 heat-treated alloysteel chain for such applications as slings, lifting assemblies,and load binding.NOTE
3、 1This specification does not cover alloy steel chain for pocketwheel applications.1.2 This specification is a performance standard for Grade100 chain used between 20 and 400F 29 and 205C. Thechain manufacturer should be contacted for use at temperaturesoutside this range.1.3 The values stated in ei
4、ther SI units or in other units shallbe regarded separately as standard. The values stated in eachsystem may not be exact equivalents; therefore, each systemmust be used independently of the other, without combiningvalues in any way.2. Referenced Documents2.1 ASTM Standards:A 29/A 29M Specification
5、for Steel Bars, Carbon andAlloy, Hot-Wrought and Cold-Finished, General Require-ments for2A 919 Terminology Relating to Heat Treatment of Metals3E 30 Test Methods for Chemical Analysis of Steel, CastIron, Open-Hearth Iron, and Wrought Iron4E 350 Test Methods for Chemical Analysis of Carbon Steel,Low
6、-Alloy Steel, Silicon Electrical Steel, Ingot Iron, andWrought Iron5E 415 Test Method for Optical Emission Vacuum Spectro-metric Analysis of Carbon and Low-Alloy Steel52.2 SAE Standard:SAE J422 Microscopic Determination of Inclusions inSteels63. Terminology3.1 Definitions of Terms Specific to This S
7、tandard:3.1.1 breaking force, minimumthe minimum force inpounds or newtons at which the chain, during manufacture, hasbeen found by testing to break when a constantly increasingforce is applied in direct tension. This test is a manufacturersattribute acceptance test and shall not be used as criteria
8、 forservice.3.1.2 lotfor the purpose of acceptance testing, a lot shallconsist of 3000 ft 1000 m, or fraction thereof, of the samesize chain. If a continuous length of chain exceeds 3000 ft1000 m, it shall also be considered a lot.3.1.3 proof testa quality control tensile test applied tochain for th
9、e purpose of verifying weld and material quality. Itis the minimum force in pounds or newtons which the chainhas withstood at the time it left the producer, under a test inwhich a constantly increasing force has been applied in directtension to a straight length of chain. Proof test loads are amanuf
10、acturing integrity test and shall not be used as criteria forservice or design purposes.3.1.4 working load limit (WLL)the maximum combinedstatic and dynamic load in pounds or kilograms that shall beapplied in direct tension to an undamaged straight length ofchain.4. Ordering Information4.1 It shall
11、be the responsibility of the purchaser to specifyall requirements that are necessary for material ordered underthis specification. Such requirements include, but are notlimited to, the following:4.1.1 Product to conform to Specification A 973/A 973Mand date of issue,4.1.2 Nominal size of chain (in.
12、or mm),4.1.3 Quantity of chain (ft or m),4.1.4 Length of each piece, if required,4.1.5 Finish, if required,4.1.6 Certification of test(s), if required,4.1.7 Acceptance of inspection by purchaser, if required,and4.1.8 Supplementary requirements, if required.1This specification is under the jurisdicti
13、on of ASTM Committee A01 on Steel,Stainless Steel, and Related Alloys and is the direct responsibility of SubcommitteeA01.27 on Steel Chain.Current edition approved Sept. 10, 2001. Published November 2001. Originallypublished as A 973/A 973M-97. Last previous edition A 973/A 973M-00.2Annual Book of
14、ASTM Standards, Vol 01.05.3Discontinued. See 1998 Annual Book of ASTM Standards, Vol 01.02.4Discontinued. See 1995 Annual Book of ASTM Standards, Vol 03.05.5Annual Book of ASTM Standards, Vol 03.05.6Available from Society of Automotive Engineers, 400 Commonwealth Drive,Warrendale, PA 15096.1*A Summa
15、ry of Changes section appears at the end of this standard.Copyright ASTM International, 100 Barr Harbor Drive, PO Box C700, West Conshohocken, PA 19428-2959, United States.5. Manufacturing5.1 Melting ProcessThe alloy steel shall be fully killedand have an austenitic grain size of five or finer.5.2 W
16、elding ProcessAlloy steel chain may be made by theelectric welding or gas welding process.5.3 Heat TreatmentAfter welding, alloy steel chain shallbe heat treated before applying the proof test. Heat treatmentshall include quenching and tempering as defined by Termi-nology A 919.6. Material Requireme
17、nts6.1 Heat AnalysisThe selection and amounts of the alloy-ing elements in the steel are left to the judgment of theindividual chain manufacturer provided the steel meets thefollowing criteria: carbon = 0.35 % max; phosphorous =0.025 % max; sulfur = 0.025 % max. The following elementsmust all be pre
18、sent in alloying amounts, nickel (0.40% min),chromium (0.40% min), and molybdenum (0.15% min). Thesteel shall have oxide and silicate inclusions of 4 or less asdetermined by SAE J422.6.2 Product AnalysisThe steel used may be analyzed bythe purchaser and shall conform to the requirements of 6.1subjec
19、t to the product analysis tolerances specified in Specifi-cation A 29/A 29M. Test samples may be taken from rods,bars, or finished chain. Samples for analysis shall be so takenas to represent the full cross section of the specimen.6.3 Test Methods E 30, E 350, or E 415 shall be used forreferee purpo
20、ses.7. Mechanical Requirements7.1 Proof TestAll chain shall be tested to at least the proofload prescribed in Table 1 for the appropriate size chain. Whenso tested it shall withstand these loads without loss of chainintegrity. Links or chain segments not withstanding the prooftest load shall be remo
21、ved from the chain.7.2 Breaking ForceThe breaking force test specimen shallconsist of a length from the lot containing at least the numberof links in Table 2. All chain shall be in the quenched andtempered condition before the breaking force is measured.7.2.1 Fixtures for securing chain in a testing
22、 machine shallbe properly designed to support securely the shoulder of thelink (see Note 2). The opening in the fixture shall not be morethan 125 % of the stock diameter being tested. Links engagedin the testing fixture shall not be considered part of the testspecimen.NOTE 2“U” bolts of the same or
23、larger diameter and the same orgreater strength may be used to secure the chain to the jaws of the testingmachine.7.2.2 Test results shall meet or exceed the minimum break-ing force values given in Table 1 for the appropriate size chain.7.3 Elongation:7.3.1 All chain must be in the quenched and temp
24、eredcondition before the elongation is measured.7.3.2 The elongation test specimen shall consist of a lengthfrom the lot containing at least the number of links in Table 2.7.3.3 A positive load not exceeding 10 % of the proof testshall be applied for determining the original gage length(L0).7.3.4 Th
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