The main features of PC steel strand are high strength and good relaxation(low relaxation or normal relaxation), being quite straight while streching.
Standard: ASTM A416, GB/T 5224, GB/T5223(China); , ASTMA421(USA); BS 5896(UN); JIS G3536(Japan); AS/NZS 4672(Australia); NBR-7483(Brazil); EN10138(Europe); ISO934
WE can aslo offer PC wire and strand conforming to the technical standards agreed by both the consumer and us.
At many projects of posttension and pretension prestress, smooth steel strand is the most popular steel. The compact steel strand is mostly used for lifting projects and some like nuclear power engineering. Galvanized strand usually applies to bridge tie bar, digging line and external prestressed programmes. The usage of epoxy coated strand is almost alike to that of gavanized strand.
Grade Norminal
Dia. (mm) tolerance(mm) Cross section area(Sn/mm2) Re. Mass per 1000m(kg/1000m) Minimum Breaking Load Min Load at 1% Extension(KN) Lo≥ 610mm(%) the relaxation at 1000h)Initial to 70%of nominal max load)(r/%)
Low-relaxation normal relaxtion
250{1725} 9.53 ± 0.40 51.61 405 89 80.1 3.5 2.5 3.5
11.11 69.68 548 120.1 108.1
12.7 92.9 730 160.1 144.1
15.24 139.35 1094 240.2 216.2
270{1860} 9.53 +0.65
-0.15 54.84 432 102.3 92.1 3.5 2.5 3.5
11.11 74.19 582 137.9 124.1
12.7 98.71 775 183.7 165.1
15.24 140 1102 260.7
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