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4扭剪型高強(qiáng)螺栓

扭剪型高強(qiáng)螺栓

扭剪型高強(qiáng)螺栓

GB/T 3632~363 Steel structure adopts high strength torsional shear bolt type Size

Functions: torsional high strength shear type is the advanced large hexagonal high-strength bolt and high strength bolt, belonging to a kind of standard parts. After first tight and end tight construction, it is generally used for permanent connection.

Application: suitable for railway and Highway Bridge, boiler steel structure, industrial buildings, high-rise buildings, tower mast structure, hoisting machinery and other friction type high strength bolt connection.
 

 

Thread specifications -d

M16

M20

M22

M24

M27

M30

Screw pitch P

2

2.5

2.5

3

3

3.5

da

max

18.83

24.4

26.4

28.4

32.84

35.84

ds

max

16.43

20.52

22.52

24.52

27.84

30.84

min

15.57

19.48

21.48

23.48

26.16

29.16

dw

min

27.9

34.5

38.5

41.5

42.8

46.5

dk

max

30

37

41

44

50

55

k,

nom

10

13

14

15

17

19

max

10.75

13.9

14.9

15.9

17.9

20.05

min

9.25

12.1

13.1

14.1

16.1

17.95

k'

min

12

14

15

16

17

18

k"

max

17

19

21

23

24

25

r

min

1.2

1.2

1.2

1.6

2

2

db

max

11.3

14.1

15.6

16.9

19.3

21.4

min

11

13.8

15.3

16.6

18.7

20.8

dc                      ≈

12.8

16.1

17.8

19.3

21.9

24.4

de                      ≈

13

17

18

20

22

24


Mechanical behavior:

Grade

Tensile strength

Yield strengthσ0.2

Elongation δ5

Shrinking percentage Ψ

σь

Mpa

%

%

Mpa

min

10.9S

1040~1240

940

10

42

8.8S

830~1030

660

12

45


Loading force:

Thread specifications-d

M16

M20

M22

M24

M27

M30

Pressed force section  mm2

157

245

303

353

459

561

Pull force   KN

10.9S

163~195

255~304

315~376

367~438

477~569

583~696

8.8S

130~162

203~252

251~312

293~364

381~473

466~578


Materials for steel bolt and nut, flat pad:

Type

Performance level

Thread specifications

Materials

Bolt

10.9S

M12~M24

20MnTiB

M27~M30

35VB

8.8S

M12~M16

35#

M20~M24

20MnTiB

M27~M30

35VB

Nut

8H 10H

M12~M30

35#

Washer

35~45 HRC

12~30

45#


Chemical component:

Materials

C%

Si%

Mn%

Ti%

V%

B%

P%

S%

20MnTiB

0.17~0.24

0.17~0.37

1.30~1.60

0.04~0.10

  

0.0005~0.0035

≤0.035

≤0.035

35VB

0.31~0.37

0.17~0.37

0.50~0.90

  

0.05~0.12

0.001~0.004

≤0.04

≤0.04

35#

0.32~0.40

0.17~0.37

0.50~0.80

      

≤0.035

≤0.035

45#

0.42~0.50

0.17~0.37

0.50~0.80

      

≤0.035

≤0.035