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Specifications

LRPC / HT Strands

Technical Data Sheet (Indian Specification)

Sr.No. Descriptions UOM Specified Values
9.60 mm 12.90 mm 15.20 mm 15.70 mm
1 Strand Designation – 9.60-1860-P 12.90-1860-P 15.20-1860-P 15.70-1860-P
2 Nominal Diameter mm 9.60 12.90 15.20 15.70
3 Diameter Toerance – General Tolerance will be Applicable based on
Specified Weight Tolerance
4 Nominal Area Sq. mm 55 100 139 150
5 Unit Weight Kg/Km 429.6 781 1086 1172
6 Weight Tolerance % ±2 ±2 ±2 ±2
7 Lay Length Times of Nominal Diameter of Strand 12 to 16 12 to 16 12 to 16 12 to 16
8 Lay Direction RH or LH RH RH RH RH
9 Minimum 0.2% Proof Load kN 89.8 164 228 246
10 Breaking Load (Minimum) kN 102 186 259 279
11 Elongation Minimum % 3.5 3.5 3.5 3.5
12 Modulus of Elasticity Gpa or kN/Sq mm May be Taken as 195
13 Relaxation % (Under Load -70% of Specified Breaking Load.)
(a) For 100 Hours % Relaxation losses should not more than 1.8
(b) For 1000 Hours % Relaxation losses should not more than 2.5

Technical Data Sheet (European Specification)

Sr.No. Descriptions UOM Specified Values
9.30 mm 12.90 mm 15.20 mm 15.70 mm
1 Steel Designation – Y1860S7 Y1860S7 Y1860S7 Y1860S7
2 Nominal Diameter mm 9.30 12.90 15.20 15.70
3 Diameter Tolerance – General Tolerance will be Applicable based on
Specified Weight Tolerance Given
4 Nominal Area Sq. mm 52 100 139 150
5 Unit Weight Kg/Km 406.1 781 1086 1172
6 Weight Tolerance % ±2 ±2 ±2 ±2
7 Lay Length Times of Nominal Diameter of Strand 14 to 18 14 to 18 14 to 18 14 to 18
8 Lay Direction RH or LH RH RH RH RH
9 Proof force (Min. Value of 0.1%) kN 85.1 164 228 246
10 Breaking Load kN 96.7 to 111 186 to 214 259 to 298 279 to 321
11 Elongation Minimum % 3.5 3.5 3.5 3.5
12 Relaxation – 1000 Hrs (Maximum for 70 % Initial Load) % 2.5 2.5 2.5 2.5
13 Modulus of Elasticity Gpa or kN/Sq mm May be Taken as 195
14 Chemical Composition
(a) Sulphur (max) % 0.04 0.04 0.04 0.04
(b) Phosphorus (max) % 0.04 0.04 0.04 0.04

Technical Data Sheet (British Specification)

Sr.No. Descriptions UOM Specified Values
9.30 mm 12.90 mm 15.20 mm 15.70 mm
1 Steel Designation – Y1860S7 Y1860S7 Y1860S7 Y1860S7
2 Nominal Diameter mm 9.30 12.90 15.20 15.70
3 Diameter Tolerance – General Tolerance will be Applicable based on
Specified Weight Tolerance Given
4 Nominal Area Sq. mm 52 100 139 150
5 Unit Weight Kg/Km 406.1 781 1086 1172
6 Weight Tolerance % ±2 ±2 ±2 ±2
7 Lay Length Times of Nominal Diameter of Strand 14 to 18 14 to 18 14 to 18 14 to 18
8 Lay Direction RH or LH RH RH RH RH
9 Proof force (Min. Value of 0.1%) kN 85.1 164 228 246
10 Breaking Load kN 96.7 to 111 186 to 214 259 to 298 279 to 321
11 Elongation Minimum % 3.5 3.5 3.5 3.5
12 Relaxation – 1000 Hrs (Maximum for 70 % Initial Load) % 2.5 2.5 2.5 2.5
13 Modulus of Elasticity Gpa or kN/Sq mm May be Taken as 195
14 Chemical Composition
(a) Sulphur (max) % 0.04 0.04 0.04 0.04
(b) Phosphorus (max) % 0.04 0.04 0.04 0.04

Technical Data Sheet (American Specification)

Sr.No. Descriptions UOM Specified Values
9.53 mm 12.70 mm 15.20 mm 15.70 mm
1 Grade – 270 [1860] 270 [1860] 270 [1860] 270 [1860]
2 Nominal Diameter mm 9.53 12.70 15.20 15.70
3 Diameter Tolerance mm +0.65/-0.15 +0.65/-0.15 +0.65/-0.15 +0.65/-0.15
4 Nominal Area Sq. mm 55.00 98.70 140 150
5 Unit Weight Kg/Km 430 780 1100 1200
6 Weight Tolerance – General Tolerance will be Applicable based on Specified Diameter Tolerance Given
7 Lay Length Times of Nominal Diameter of Strand 12 to 16 12 to 16 12 to 16 12 to 16
8 Lay Direction RH or LH RH RH RH RH
9 Minimum Load at 1.0% Extension kN 92.1 165.3 234.6 251.0
10 Breaking Load (Minimum) kN 102 184 261 279
11 Elongation Minimum % 3.5 3.5 3.5 3.5
12 Maximum Relaxation – 1000 Hrs (for 70 % Initial Load) % 2.5 2.5 2.5 2.5
13 Modulus of Elasticity Gpa or kN/Sq mm May be Taken as 195
14 Chemical Composition
(a) Sulphur (max) 0.04 0.04 0.04 0.04
(b) Phosphorus (max) % 0.04 0.04 0.04 0.04

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