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Galvanized Steel Strand



Wire diameter |
Permissible Variation |
Adherence Test |
Stress at 1% Extension |
Tensile strength |
Elongation in 250mm |
Zinc coating Class A |
|
mm |
mm |
Ration of Mandrel D to Wire D (Dia) |
Class A MPa(min) |
Class A MPa(min) |
Class A %(min) |
mm |
g/ m² |
|
|
|
|
|
|
1.60 to 1.90 |
198 |
1.60 to 2.30 |
+0.04/-0.03 |
3 |
1310 |
1450 |
3.0 |
over 1.90 to 2.30 |
214 |
over 2.30 to 3.05 |
+0.05/-0.05 |
4 |
1280 |
1410 |
3.5 |
over 2.30 to 2.70 |
230 |
over 3.05 to 3.60 |
+0.08/-0.05 |
5 |
1240 |
1410 |
4.0 |
over 2.70 to 3.10 |
244 |
over 3.60 to 4.80 |
+0.10/-0.08 |
5 |
1170 |
1380 |
4.0 |
over 3.10 to 3.50 |
260 |
|
|
|
|
|
|
over 3.50 to 3.90 |
270 |
|
|
|
|
|
|
over 3.90 to 4.50 |
275 |
|
|
|
|
|
|
over 4.50 to 4.80 |
305 |
ASTM A 475-2003
Nominal Diameter of Strand. Inch (mm) |
Number of Wires in Strand |
Nominal Diameter of Coated Wires in Strand. (mm) |
Approximate Weight of Strand(kg/Km) |
Minimum Breaking Strength of Strand (KN) |
||||
|
|
|
|
Utilities Grade |
Common Grade |
Siemens Martin Grade |
High Strength Grade |
Extra High Strength Grade |
3/16 (4.76) |
7 |
1.57 |
109 |
----- |
5.115 |
8.452 |
12.677 |
17.748 |
7/32 (5.56) |
3 |
2.64 |
131 |
----- |
6.228 |
10.409 |
15.569 |
21.796 |
7/32 (5.56) |
7 |
1.83 |
146 |
------ |
6.850 |
11.387 |
17.126 |
24.020 |
1/4 (6.35) |
7 |
2.03 |
180 |
------ |
8.452 |
14.012 |
21.129 |
29.581 |
9/32 (7.14) |
7 |
2.36 |
244 |
20.462 |
11.432 |
18.905 |
28.469 |
39.812 |
5/16 (7.94) |
7 |
2.64 |
305 |
----- |
14.234 |
23.798 |
35.586 |
49.820 |
3/8 (9.52) |
7 |
3.05 |
407 |
51.155 |
18.905 |
30.915 |
48.040 |
68.503 |
7/16 (11.11) |
7 |
3.68 |
595 |
80.068 |
25.355 |
41.591 |
64.499 |
92.523 |
1/2 (12.70) |
7 |
4.19 |
770 |
111.206 |
32.917 |
53.823 |
83.627 |
119.657 |
1/2 (12.70) |
19 |
2.54 |
751 |
------ |
33.895 |
56.492 |
84.961 |
118.768 |
9/16 (14.29) |
19 |
2.87 |
949 |
------- |
42.881 |
71.616 |
107.202 |
149.905 |
5/8 (15.88) |
19 |
3.18 |
1186 |
------- |
48.930 |
80.513 |
124.995 |
178.819 |
3/4 (19.05) |
19 |
3.81 |
1155 |
------- |
71.172 |
116.643 |
181.487 |
259.331 |
Nominal wire diameter mm |
tolerance |
Stress at 1% extension |
Tensile strength |
Elongation on 250mm |
Wrapping test |
No of torsion twists |
Zinc Coating Class A |
||
over |
Up to and including |
mm |
N/mm² |
N/mm² |
% |
|
|
Min mass of Zn |
Min No. of one minute dips |
|
|
|
min |
min |
Min |
*D |
Min |
g/ m² |
|
1.57 |
1.75 |
±0.3 |
1170 |
1400 |
3.0 |
1 |
18 |
200 |
2 |
1.75 |
2.25 |
±0.3 |
1170 |
1400 |
3.0 |
1 |
18 |
215 |
2.5 |
2.25 |
2.75 |
±0.4 |
1140 |
1350 |
3.0 |
1 |
16 |
230 |
2.5 |
2.75 |
3.00 |
±0.5 |
1140 |
1350 |
3.5 |
1 |
16 |
230 |
3 |
3.00 |
3.50 |
±0.5 |
1110 |
1300 |
3.5 |
1 |
14 |
245 |
3.5 |
3.50 |
4.25 |
±0.6 |
1110 |
1300 |
4.0 |
1 |
12 |
260 |
3.5 |
4.25 |
4.75 |
±0.6 |
1110 |
1300 |
4.0 |
1 |
12 |
275 |
4 |
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