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△ 中國標準GB/T1228～1231 鋼結構用重型高強度螺栓、螺母、墊圈連接副
|
螺紋規(guī)格M |
M12 |
M16 |
M20 |
M22 |
M24 |
M27 |
M30 |
||||||||
|
P |
1.75 |
2 |
2.5 |
2.5 |
3 |
3 |
3.5 |
||||||||
|
dw |
min |
19.2 |
24.9 |
31.4 |
33.3 |
38.0 |
42.8 |
46.5 |
|||||||
|
k |
公稱 |
7.5 |
10 |
12.5 |
14 |
15 |
17 |
18.7 |
|||||||
|
max |
7.95 |
10.75 |
13.40 |
14.90 |
15.90 |
17.90 |
19.75 |
||||||||
|
min |
7.05 |
9.25 |
11.60 |
13.10 |
14.10 |
16.10 |
17.65 |
||||||||
|
k’ |
min |
4.9 |
6.5 |
8.1 |
9.2 |
9.9 |
11.3 |
12.4 |
|||||||
|
r |
min |
1.0 |
1.0 |
1.5 |
1.5 |
1.5 |
2.0 |
2.0 |
|||||||
|
S |
max |
21 |
27 |
34 |
36 |
41 |
46 |
50 |
|||||||
|
min |
20.16 |
26.16 |
33 |
35 |
40 |
45 |
49 |
||||||||
|
b |
L |
≤40 |
≥45 |
≤50 |
≥55 |
≤60 |
≥65 |
≤65 |
≥70 |
≤70 |
≥75 |
≤75 |
≥80 |
≤80 |
≥85 |
|
nominal |
25 |
30 |
30 |
35 |
35 |
40 |
40 |
45 |
45 |
50 |
50 |
55 |
55 |
60 |
|
|
L |
|
25-75 |
45-130 |
50-160 |
55-220 |
60-250 |
65-280 |
70-320 |
|||||||
|
螺栓/螺母/墊圈尺寸表 |
|||||||||
|
螺紋規(guī)格M |
M12 |
M16 |
M20 |
M22 |
M24 |
M27 |
M30 |
||
|
螺距P |
1.75 |
2 |
2.5 |
2.5 |
3 |
3 |
3.5 |
||
|
螺 |
dw |
min |
19.2 |
24.9 |
31.4 |
33.3 |
38.0 |
42.8 |
46.5 |
|
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 |
||
|
m |
max |
12.3 |
17.1 |
20.7 |
23.6 |
24.2 |
27.6 |
30.7 |
|
|
min |
11.87 |
16.4 |
19.4 |
22.3 |
22.9 |
26.3 |
29.1 |
||
|
S |
max |
21 |
27 |
34 |
36 |
41 |
46 |
50 |
|
|
min |
20.16 |
26.16 |
33 |
35 |
40 |
45 |
49 |
||
|
墊 |
d2 |
min |
23.7 |
31.4 |
38.4 |
40.4 |
45.4 |
50.1 |
54.1 |
|
max |
25 |
33 |
40 |
42 |
47 |
52 |
56 |
||
|
d1 |
min |
13 |
17 |
21 |
23 |
25 |
28 |
31 |
|
|
max |
13.43 |
17.43 |
21.52 |
23.52 |
25.52 |
28.52 |
31.62 |
||
|
h |
公稱 |
3.0 |
4.0 |
4.0 |
5.0 |
5.0 |
5.0 |
5.0 |
|
|
min |
2.5 |
3.5 |
3.5 |
4.5 |
4.5 |
4.5 |
4.5 |
||
|
max |
3.8 |
4.8 |
4.8 |
5.8 |
5.8 |
5.8 |
5.8 |
||
|
d3 |
min |
15.23 |
19.23 |
24.32 |
26.32 |
28.32 |
32.84 |
35.84 |
|
|
max |
16.03 |
20.03 |
25.12 |
27.12 |
29.12 |
33.64 |
36.64 |
||
|
螺栓、螺母、墊圈使用配合表 |
|||
|
類別 |
螺栓 |
螺母 |
墊圈 |
|
型式尺寸 |
按GB/T 1228 |
按GB/T 1229 |
按GB/T 1230 |
|
性能等級 |
10.9S |
10H |
35～45HRC |
|
8.8S |
8H |
35～45HRC |
|
|
螺栓材料和機械性能 |
|||||||
|
性能等級 |
螺紋規(guī)格 |
材質 |
抗拉強度Mpa |
規(guī)定非比例延伸Mpa |
硬度HRC |
伸長率% |
收縮率% |
|
10.9S |
M12～M24 |
20MnTiB |
1040～1240 |
≥940 |
33～39 |
≥10 |
≥42 |
|
M27～M30 |
35VB |
||||||
|
8.8S |
M12～M24 |
20MnTiB |
830～1030 |
≥660 |
24～31 |
≥12 |
≥45 |
|
M27～M30 |
35VB |
||||||
|
|
螺母機械性能 |
|||||||
|
螺紋規(guī)格M |
M12 |
M16 |
M20 |
M22 |
M24 |
M27 |
M30 |
|
|
保證載荷（kN） |
10H |
87.7 |
163 |
255 |
315 |
367 |
477 |
583 |
|
8H |
70 |
130 |
203 |
251 |
293 |
381 |
466 |
|
|
材料 |
10H |
35或45（GB/T 699）、ML35（GB/T6478） |
||||||
|
8H |
||||||||
|
硬度 |
10H |
洛氏硬度98HRB～32HRC、維氏硬度222～304HV30 |
||||||
|
8H |
洛氏硬度95HRB～30HRC、維氏硬度206～289HV30 |
|||||||
高強度大六角頭螺栓連接副初擰扭矩值To按0.5Tc取值。
