Type

Manufacture method

state

Spec (mm)

standard

ply

breadth

extent

N2, N4, N6

Cold rolling

Anneal state (M)

Hard state (Y)

Half-hard state (Y2)

0.5-0.7

0.8-1.5

100-1000

800-1500

GB2054-80

1.8-3.5

4.0-10.0

Heat rolling

Heat process state (R)

5.0-6.0

200-1000

6.5-8.0

9.0-12.0

13.0-16.0

17.0-20.0

Type

Manufacture

method

Provide state

Outer diameter

Wall deep

standard

1.0

1.25

1.50

2.0

2.5

3.0

3.5

4.0

GB2882-81

N2

Ncu

Rolling or pulling

Soft state (M)

Hard state

(Y)

6.0, 6.5, 7.0, 7.5

8.0, 8.5, 9.0, 9.5

10.0, 10.5, 11.0, 11.5

12.0, 12.5, 13.0, 13.5

14, 15, 16, 17, 18, 19

20, 21, 22, 23, 24, 26, 28