High strength steel strand for prestressed concrete and method f

Details High strength steel strand for prestressed concrete and method f High strength steel strand for prestressed concrete and method f

1996-08-22

1998-06-09

Yee, Deborah

Metal treatment

Stock

Ferrous

148328, 148598, 148599, C22C 3802, C21D 806

Patent

active

057627240

ABSTRACT:
A high strength steel strand for PC of a wire material having a pearlite structure and containing 0.80 to 1.30% of C, 0.60 to 2.50% of Si and 0.30 to 1.50% of Mn, remainder being Fe and unavoidable impurities, wherein a cementite portion of the wire material comprises a mixed structure of fibrous cementite and granular cementite, the volumetric proportion of the granular cementite to the total cementite is 10 to 40%, the particle diameter of the granular cementite is 40 to 300.ANG., and the strand has a tensile strength of 235 kgf/mm.sup.2 or higher and an elongation of 3.5% or greater.

REFERENCES:
patent: 3196052 (1965-07-01), Hann
patent: 4889567 (1989-12-01), Fujiwara et al.
patent: 5156692 (1992-10-01), Tsukamoto
patent: 5458699 (1995-10-01), Tsukamoto et al.

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