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Wire Diamater(mm)

Diamater Tolerance(mm)

Weight of Zinc-coating(g/m2)

Stress at 1% Extension,Min(Mpa)

Tensile Strength

Min.(Mpa)

Elongation in 250mm,Min(%)

1.57-1.90

+0.04,-0.03

210

1310

1450

3.0

Over 1.9-2.3

+0.04,-0.03

220

1310

1450

3.0

Over 2.3-2.7

+0.05,-0.05

230

1280

1410

3.5

Over 2.7-3.1

+0.05,-0.05

240

1280

1410

3.5

Over3.1-3.5

+0.08,-0.05

260

1240

1410

4.0

Over 3.5-3.9

+0.08,-0.05

270

1240

1410

4.0

Over 3.9-4.5

+0.1,-0.08

275

1170

1380

4.0

Over 4.5-4.8

+0.1,-0.08

300

1170

1380

4.0

Table 1. Initial Settings for Determining Stress 1% Extension

Nominal Wire Diameter

Initial Stress

Initial setting of extensometer for a gauge length of 250mm2

mm

N/mm2

1.24

2.25

100

0.125

2.25

3

200

0.25

3

4.75

300

0.375

4.75

5.5

400

0.5

For other gauge lengths, multiply the initial setting by the gauge length in mm divided by 250

Table 2. Zinc Coating Requirements

Nominal Wire Diameter

Class A

Class B

Class C

Class D

Class E

mm

Min. mass of Zn g/m2

Min. no. of one minute dips

Min. mass of Zn g/m2

Min. no. of one minute dips

Min. mass of Zn g/m2

Min. no. of one minute dips

Min. mass of Zn g/m2

Min. no. of one minute dips

Min. mass of Zn g/m2

Min. no. of one minute dips

Over

Up to and incl.

1.24

1.5

185

2

370

3.5

150

1

365

3

185

2

1.5

1.75

200

2

400

3.5

160

1.5

460

3.5

200

2

1.75

2

215

2.5

430

4

175

2

550

4

215

2.5

2

2.25

215

2.5

430

4

175

2

550

4

250

3.5

2.25

2.75

230

3

460

4

190

2.5

640

5

250

3.5

2.75

3

230

3

460

4

190

2.5

640

5

250

3.5

3

3.5

245

3.5

490

4

205

3

730

6

250

3.5

3.5

4.25

260

3.5

520

4

260

3.5

730

6

260

3.5

4.25

4.75

275

4

550

4

275

4

775

6

275

4

4.75

5

200

4

580

5

290

4

825

6

290

4

Table 3. Mechanical Properties of ST1A Wires

Nominal wire diameter

Diameter tolerance

Stress at 1%

extension

Tensile strength

Elongation on

250mm

Mandrel diameter for wrapping test

No. of torsion twists

mm

mm

Mpa（N/mm2）

Mpa（N/mm2）

-

-

-

over

Up to and incl.

1.24

1.5

±0.03

1170

1400

3

1

18

1.5

1.75

±0.03

1170

1400

3

1

18

1.75

2.25

±0.03

1170

1400

3

1

18

2.25

2.75

±0.04

1140

1350

3

1

16

2.75

3

±0.05

1140

1350

3.5

1

16

3

3.5

±0.05

1100

1300

3.5

1

14

3.5

4.25

±0.06

1100

1300

4

1

12

4.25

4.75

±0.06

1100

1300

4

1

12

4.75

5.5

±0.07

1100

1300

4

1

12