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Function: High strength bolt belongs to a kind of standard parts. After first tight and end tight construction, it is generally used for permanent connection.
Application: Application on the steel structure engineering, steel structure steel plate used to connect to the join points.
GB/T1228 Steel structure has high strength large hexagon head bolts type Size
|
Thread specifications-d |
M12 |
M16 |
M20 |
M22 |
M24 |
M27 |
M30 | ||||||||
|
Screw pitch P |
1.75 |
2 |
2.5 |
2.5 |
3 |
3 |
3.5 | ||||||||
|
c |
max |
0.8 |
0.8 |
0.8 |
0.8 |
0.8 |
0.8 |
0.8 | |||||||
|
min |
0.4 |
0.4 |
0.4 |
0.4 |
0.4 |
0.4 |
0.4 | ||||||||
|
da |
max |
15.23 |
19.23 |
24.32 |
26.32 |
28.32 |
32.84 |
35.84 | |||||||
|
ds |
max |
12.43 |
16.43 |
20.52 |
22.52 |
24.52 |
27.84 |
30.4 | |||||||
|
min |
11.57 |
15.57 |
19.48 |
21.48 |
23.48 |
26.16 |
29.16 | ||||||||
|
dw |
min |
19.2 |
24.9 |
31.4 |
33.3 |
38 |
42.8 |
46.5 | |||||||
|
e |
min |
22.78 |
59.56 |
37.29 |
39.55 |
45.2 |
50.85 |
55.37 | |||||||
|
k |
nominal |
7.5 |
10 |
12.5 |
14 |
15 |
17 |
18.7 | |||||||
|
max |
7.95 |
10.75 |
13.4 |
14.9 |
15.9 |
17.9 |
19.75 | ||||||||
|
min |
7.05 |
9.25 |
11.6 |
13.1 |
14.1 |
16.1 |
17.65 | ||||||||
|
r |
min |
1 |
1 |
1.5 |
1.5 |
1.5 |
2 |
2 | |||||||
|
s |
max |
21 |
27 |
34 |
36 |
41 |
46 |
50 | |||||||
|
min |
20.16 |
26.16 |
33 |
35 |
40 |
45 |
49 | ||||||||
|
b |
L nominal |
<45 |
≥45 |
<55 |
≥55 |
<65 |
≥65 |
<70 |
≥70 |
<75 |
≥75 |
<80 |
≥80 |
<85 |
≥85 |
|
nominal |
25 |
30 |
30 |
35 |
35 |
40 |
40 |
45 |
45 |
50 |
50 |
55 |
55 |
60 | |
Mechanical behavior:
|
Grade |
Tensile strength |
Yield strength σ0.2 |
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 |
M12 |
M16 |
M20 |
M22 |
M24 |
M27 |
M30 | |
|
Pressed force section mm2 |
84.3 |
157 |
245 |
303 |
353 |
459 |
561 | |
|
Pull force KN |
10.9S |
87.7~104.5 |
163~195 |
255~304 |
315~376 |
367~438 |
477~569 |
583~696 |
|
8.8S |
70.0~86.8 |
130~162 |
203~252 |
251~312 |
293~364 |
381~473 |
466~578 | |
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