Techical Parameters
7-Wire Uncoated Steel Strand for Prestressed Concrete as per ASTM A 416
|
Min.Breaking Strength |
Nominal Dia. |
Dia. Tolerance |
Norminal Steel Area |
Nominal Weight |
Min. Breaking Load |
Min.Load at 1%Extension |
Min.Elongation Lo≥610mm |
0.7 G.U.T.S 1000hNorminal Relaxation |
|
MPA |
mm |
mm |
Mm2 |
Kg/Km |
KN |
KN |
% |
% |
|
1860 |
9.53 |
+0.66,-0.15 |
54.84 |
432 |
102.3 |
92.1 |
≥3.5 |
≤2.5 |
|
11.11 |
74.19 |
582 |
137.9 |
124.1 |
||||
|
12.70 |
98.7 |
775 |
183.7 |
165.3 |
||||
|
15.24 |
140.0 |
1102 |
260.7 |
234.6 |
||||
|
17.80 |
190.0 |
1492 |
353.0 |
318.0 |
||||
|
2000 |
12.70 |
+0.66,-0.15 |
98.7 |
775 |
197.4 |
177.7 |
≥3.5 |
≤2.5 |
|
15.24 |
140.0 |
1102 |
280.0 |
252. |
British standard(BS5896):
| Strand type | Norminal Diameter | Tolerance | Area of section |
Theoretical Weight per 1000 meter |
Tensile Strength |
Specified characteristic Breaking load |
Specified Characteristics 0.1%yield intinal load |
Load at 1% Elongation L0≥500 |
Minimum Elongation At Max Load |
Relaxation Value 1000h | ||
| mm | mm | Mm2 | kg | N/mm2 | KN | KN | % | |||||
|
Standard 7-wire |
9.3 | +0.3 | 52 | 408 | 1770 | 92 | 78 | 81 |
3.5 |
1.0 |
2.5 |
4.5 |
| -0.15 | ||||||||||||
| 11 | +0.3 | 71 | 557 | 1770 | 125 | 106 | 110 | |||||
| -0.15 | ||||||||||||
| 12.5 | +0.4 | 93 | 730 | 1770 | 164 | 139 | 144 | |||||
| -0.2 | ||||||||||||
| 15.2 | +0.4 | 139 | 1090 | 1670 | 232 | 197 | 204 | |||||
| -0.2 | ||||||||||||
|
Super 7-wire |
9.6 | +0.3 | 55 | 432 | 1860 | 102 | 87 | 90 |
3.5 |
1.0 |
2.0 |
2.0 |
| -0.15 | ||||||||||||
| 11.3 | +0.3 | 75 | 590 | 1860 | 139 | 118 | 122 | |||||
| -0.15 | ||||||||||||
| 12.9 | -0.15 | 100 | 785 | 1860 | 186 | 158 | 163 | |||||
| +0.4 | ||||||||||||
| 15.7 | +0.4 | 150 | 1180 | 1770 | 265 | 225 | 233 | |||||
| -0.2 | ||||||||||||
|
Die-Drawn 7-wire |
12.7 |
+0.4 -0.2 |
112 | 890 | 1860 | 209 | 178 | 184 |
3.5 |
1.0 |
2.0 |
2.0 |
| 15.2 | 165 | 1295 | 1820 | 300 | 255 | 264 | ||||||
| 18 | 223 | 1750 | 1700 | 380 | 323 | 334 | ||||||
Japanese standards JIS G3536:
| Steel Grade | Norminal Diameter | Tolerance | Area of section |
Theoretical Weight per 1000 meter |
Breaking Load |
Load at 0.2% Permaneat elongation |
Minimum Elongation At Max load≥ |
Relaxation Value ≤ |
| mm | mm | Mm2 | kg | ≥KN | ≥KN | % | % | |
| SWPR7A | 9.3 |
+0.4 -0.2 |
51.61 | 405 | 88.8 | 75.5 |
3.5 |
3.0 |
| 10.8 | 69.68 | 546 | 120 | 102 | ||||
| 12.4 | 92.90 | 729 | 160 | 136 | ||||
| 15.2 | 138.70 | 1101 | 240 | 204 | ||||
| WEPR7B | 9.5 |
+0.4 -0.2 |
58.84 | 432 | 102 | 86.8 | ||
| 11.1 | 74.19 | 580 | 138 | 118 | ||||
| 12.7 | 98.71 | 774 | 183 | 156 | ||||
| 15.2 | 138.70 | 1101 | 261 | 222 |
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