1、MechanicalProperty Index
Steel strands structure | Nominal OD /mm | Strength grade/MPa | maximal force of the whole piece of steel strands/KN | Maximanl value of the maximal force of the whole piece of steel strands/KN | 0.2% yield strengh/kN | The genera enlogation rate of maximal force ≥500mm(%) | 1000h relaxation(%) | |
70%the largest nominal loading | 80%the largest nominal loading | |||||||
min | max | min | min | max | max | |||
1×7 Standard type | 15.2 | 1470 | 206 | 234 | 181 | 3.5 | 2.5 | 4.5 |
1570 | 220 | 248 | 194 | |||||
1670 | 234 | 262 | 206 | |||||
9.5 | 1570 | 94.3 | 105 | 83 | ||||
11.1 | 1670 | 128 | 142 | 113 | ||||
12.7 | 1720 | 170 | 190 | 150 | ||||
15.2 | 241 | 269 | 212 | |||||
17.8 | 327 | 365 | 288 | |||||
18.9 | 1820 | 400 | 444 | 352 | ||||
15.7 | 1770 | 266 | 296 | 234 | ||||
21.6 | 504 | 561 | 444 | |||||
9.5 | 1860 | 102 | 113 | 89.8 | ||||
11.1 | 138 | 153 | 121 | |||||
12.7 | 184 | 203 | 162 | |||||
15.2 | 260 | 288 | 229 | |||||
15.7 | 279 | 309 | 246 | |||||
17.8 | 355 | 391 | 311 | |||||
18.9 | 409 | 453 | 360 | |||||
21.6 | 530 | 587 | 466 | |||||
9.5 | 1960 | 107 | 118 | 94.2 | ||||
11.1 | 145 | 160 | 128 | |||||
12.7 | 193 | 213 | 170 | |||||
15.2 | 274 | 302 | 241 | |||||
l×7I | 12.7 | 1860 | 184 | 288 | 162 | |||
15.2 | 1860 | 260 | 231 | 229 | ||||
(l×7)C | 12.7 | 1860 | 208 | 333 | 183 | |||
15.2 | 1820 | 300 | 428 | 264 | ||||
18 | 1720 | 384 | 428 | 338 |
2、 Packing Size
Size of per coil steel strands:the insidediameter of steel strands coil ≥750mm (usually 800mm)when steel strands size OD≤18.9mm;the insidediameter of steel strands coil ≥1100mm when steelstrands size OD﹥18.9mm ;width:750±50mm,single coil weightcould be controlled,usually 2.5~3.0t,binding not lessthan 6 round。
Container loading calculating method:calculatingaccording to2.5ton per coil,11 coils
in one 20’container,almost 27.5ton。
3.Testing:
3.1 including rawmaterial entering mill、semi producttesting、final producttesting
3.2 Testing Items:
3.2.1 MachanicalProperty:maximal force(tentile strength)、yield strengh、500mmstandard distance elongation≥3.5%、stess relaxationrate during 1000 hours ≤2.5%、elasticity modulus、special experiment(axial fatigueexperiment、skewness tensile、stress corrosionneed both parties consult and indicate clearly in the contract)
3.2.2 appearance andsize:visual quality、outside diameter、straigtness。
there is no any oil、lubricating greaseon the the surface of the steel strands,tempering colorpermitted.
straightness:to put a piece ofsteel strands with one meter long chord on the plane,the highest heightof the inside of the chord and arc
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