Strength level

Nominal

Diameter

(mm) 

Tensile strength

not less than

(MPa)

Stress at 1% elongation

not less than

(MPa)

Elongation after broken 

% L0=250mm

not less than

Torsion test

times/360°

not less than

Diameter of core bar in winding test

(multiple of steel

 wire diameter)

1^st coating

2^nd coating

1^st coating

2^nd coating

1^st coating

2^nd coating

Ordinary

strength

＞1.24~2.25

1340

1240

1170

1100

3.0

4.0

18

1

＞2.25~2.75

1310

1210

1140

1070

3.0

4.0

16

1

＞2.75~3.00

1310

1210

1140

1070

3.5

4.0

16

1

＞3.00~3.50

1290

1190

1100

1000

3.5

4.0

14

1

＞3.50~4.25

1290

1190

1100

1000

4.0

4.0

12

1

＞4.25~4.75

1290

1190

1100

1000

4.0

4.0

12

1

＞4.75~5.50

1290

1190

1100

1000

4.0

4.0

12

1

High strength

＞1.24~2.25

1450

1380

1310

1240

2.5

2.5

16

3

＞2.25~2.75

1410

1340

1280

1210

2.5

2.5

16

3

＞2.75~3.00

1410

1340

1280

1210

3.0

3.0

16

4

＞3.00~3.50

1410

1340

1240

1170

3.0

3.0

14

4

＞3.50~4.25

1380

1280

1170

1100

3.0

3.0

12

4

＞4.25~4.75

1380

1280

1170

1100

3.0

3.0

12

4

＞4.75~5.50

1380

1280

1170

1100

3.0

3.0

12

4

Extra-high

strength

＞1.24~2.25

1620

1450

2.0

14

4

＞2.25~2.75

1590

1410

2.0

14

4

＞2.75~3.00

1590

1410

2.5

12

5

＞3.00~3.50

1550

1380

2.5

12

5

Nominal Diameter

(mm)

Weight of alloy coating

g/m²  not less than

Winding test

1^st coating

2^nd coating

Multiple of core bar with steel wire in diameter

No. of  windings

＞1.24~1.50

185

370

3

8

＞1.51~1.75

200

400

3

8

＞1.76~2.25

215

430

3

8

＞2.26~2.75

230

460

3

8

＞2.76~3.50

245

490

3

8

＞3.51~4.25

260

520

4

8

＞4.26~4.75

275

550

4

8

＞4.76~5.50

290

580

4

8