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Significance and Use
4.1 The breaking strength and elongation of the strand are determined by one or more tensile tests in which fracture of the specimen ideally occurs in the free span.
4.2 Mechanical properties of the strand will be negatively affected if proper care is not taken to prevent damage such as severe bending, abrasion, or nicking of the strand during sampling.
4.3 Premature failure of the test specimens may result if there is appreciable notching, cutting, or bending of the specimen by the gripping devices of the testing machine.
4.4 Errors in testing will result if the wires constituting the strand are not loaded uniformly.
4.5 The mechanical properties of the strand will be materially affected by excessive heating during test specimen collection or preparation.
1.1 These test methods describe procedures for testing the mechanical properties of multi-wire steel prestressing strand.
1.2 These test methods are intended for use in evaluating specific strand properties prescribed in specifications for multi-wire steel prestressing strand, but they do not quantify acceptance criteria specified in the applicable specification for the strand being tested.
1.3 The values stated in either inch-pound units or SI units are to be regarded separately as standard. Within the text, the SI units are shown in brackets. The values stated in each system may not be exact equivalents; therefore, each system shall be used independently of the other. Combining values from the two systems may result in non-conformance with the standard.
1.4 This standard does not purport to address all of the safety concerns, if any, associated with its use. It is the responsibility of the user of this standard to establish appropriate safety and health practices and determine the applicability of regulatory limitations prior to use.
2. Referenced Documents (purchase separately) The documents listed below are referenced within the subject standard but are not provided as part of the standard.
A370 Test Methods and Definitions for Mechanical Testing of Steel Products
E4 Practices for Force Verification of Testing Machines
E83 Practice for Verification and Classification of Extensometer Systems
E328 Test Methods for Stress Relaxation for Materials and Structures
ICS Number Code 77.140.15 (Steels for reinforcement of concrete)
UNSPSC Code 31152204(Stranded steel wire )
|Link to Active (This link will always route to the current Active version of the standard.)|
ASTM A1061 / A1061M-16, Standard Test Methods for Testing Multi-Wire Steel Prestressing Strand, ASTM International, West Conshohocken, PA, 2016, www.astm.orgBack to Top