ASTM A 416/A416M - 02 Standard Specification for Steel Strand, Uncoated Seven-Wire for Prestressed Concrete

American Society for Testing and Materials (ASTM). Current edition approved Sept 10, 2002. Published June 2003. 5p. This specification covers two types and two grades of seven-wire, uncoated steel strand for use in pretensioned and post-tensioned prestressed concrete construction. The two types of strand are low-relaxation and stress-relieved (normalrelaxation). Low-relaxation strand shall be regarded as the standard type. Stress-relieved (normal-relaxation) strand will not be furnished unless specifically ordered, or by arrangement between purchaser and supplier. Grade 1725 [250] and Grade 1860 [270] have minimum ultimate strengths of 1725 MPa [250 ksi] and 1860 MPa [270 ksi], respectively, based on the nominal area of the strand.