ASTMA416_A416M-06.pdf

Designation: A 416/A 416M – 06 Standard Specification for Steel Strand, Uncoated Seven-Wire for Prestressed Concrete1 This standard is issued under the fixed designation A 416/A 416M; the number immediately following the designation indicates the year of 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 (e) indicates an editorial change since the last revision or reapproval. This standard has been approved for use by agencies of the Department of Defense. 1. Scope* MIL-STD-129 Marking for Shipment and Storage3 1.1 This specification covers two types and two grades of MIL-STD-163 Steel Mill Products Preparation for Ship- seven-wire, uncoated steel strand for use in pretensioned and ment and Storage3 post-tensioned prestressed concrete construction. The two 2.3 U.S. Federal Standard: types of strand are low-relaxation and stress-relieved (normal- Fed. Std. No. 123 Marking for Shipments (Civil Agencies)3 relaxation). Low-relaxation strand shall be regarded as the 3. Terminology standard type. Stress-relieved (normal-relaxation) strand will not be furnished unless specifically ordered, or by arrangement 3.1 Definitions of Terms Specific to This Standard: between purchaser and supplier. Grade 1725 [250] and Grade 3.1.1 strand, n—a group of wires having a center wire 1860 [270] have minimum ultimate strengths of 1725 MPa