Type of surface shape

Nominal diameter

Dn/

mm

Nominal cross- sectional area

Sn/

mm2

Cross- sectional area

S/

mm2

Weight for reference per meter/

(g/m)

Tensile strength

Rm≥MPa

Proof strength non-

proportional extension Rp0.2≥MPa

Bending property

Min

Max

Performance requirement

Bending radius/

mm

Round

6

28.3

26.8

29.0

222

To all sizes

bars

1080

1230

1420

1570

To all sizes

bars

930

1080

1280

1420

Time of repeated bending

≥4

/180°

15

7

38.5

36.3

39.5

302

20

8

50.3

47.5

51.5

394

20

10

78.5

74.1

80.4

616

25

11

95.0

93.1

97.4

746

No crack in the sinuosity after

160°~180°bending

Bend diameter =10 X Nominal diameter

12

113.0

106.8

115.8

887

13

133.0

130.3

136.3

1044

14

154.0

145.6

157.8

1209

16

201.0

190.2

206.0

1578

Spiral flute

7.1

40.0

39.0

41.7

314

—

9

64.0

62.4

66.5

502

10.7

90.0

87.5

93.6

707

12.6

125.0

121.5

129.9

981

Ribbed

6

28.3

26.8

29.0

222

—

8

50.3

47.5

51.5

394

10

78.5

74.1

80.4

616

12

113.0

106.8

115.8

887

14

154.0

145.6

157.8

1209

16

201.0

190.2

206.0

1578