Steel Strand, Uncoated Seven-Wire for Concrete Reinforcement
ASTM Designation: A 416/A 416M-06
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 (normal-relaxation).
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  and Grade 1860  have minimum ultimate strengths of 1725 MPa [250 ksi] and 1860 MPa
[270 ksi], respectively, based on the nominal area of the strand.
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