Valeurs de départ suggérées
Les calculs de couple estimés ci-dessous ne sont fournis qu'à titre indicatif. L'utilisation de son contenu par quiconque est de la seule responsabilité de cette personne et ils assument tous les risques.
En raison de nombreuses variables qui affectent la relation couple-tension comme l'erreur humaine, la texture de la surface et la lubrification, la seule façon de déterminer le couple correct est par l'expérimentation dans des conditions réelles de joint et d'assemblage.
ASTM A307
Taille de boulon |
TPI |
Charge d'épreuve (lb)1 |
Charge de serrage (lb)2 |
Couple de serrage (ft-lbs) |
Galv + ciré |
Galv |
Plaine |
1/4 |
20 |
1,053 |
790 |
2 |
4 |
3 |
5/16 |
18 |
1,735 |
1,302 |
3 |
8 |
7 |
3/8 |
16 |
2,567 |
1,925 |
6 |
15 |
12 |
7/16 |
14 |
3,521 |
2,640 |
10 |
24 |
19 |
1/2 |
13 |
4,700 |
3,525 |
15 |
37 |
29 |
9/16 |
12 |
6,028 |
4,521 |
21 |
53 |
42 |
5/8 |
11 |
7,485 |
5,614 |
29 |
73 |
58 |
3/4 |
10 |
11,062 |
8,297 |
52 |
130 |
104 |
7/8 |
9 |
15,301 |
11,476 |
84 |
209 |
167 |
1 |
8 |
20,071 |
15,053 |
125 |
314 |
251 |
11/8 |
7 |
25,271 |
18,953 |
178 |
444 |
355 |
11/4 |
7 |
32,093 |
24,070 |
251 |
627 |
501 |
13/8 |
6 |
38,254 |
28,690 |
329 |
822 |
657 |
11/2 |
6 |
46,534 |
34,900 |
436 |
1,091 |
873 |
13/4 |
5 |
62,928 |
47,196 |
688 |
1,721 |
1,377 |
2 |
41/2 |
82,800 |
62,100 |
1,035 |
2,588 |
2,070 |
21/4 |
41/2 |
107,640 |
80,730 |
1,514 |
3,784 |
3,027 |
21/2 |
4 |
132,480 |
99,360 |
2,070 |
5,125 |
4,140 |
23/4 |
4 |
163,282 |
122,461 |
2,806 |
7,016 |
5,613 |
3 |
4 |
197,726 |
148,295 |
3,707 |
9,268 |
7,415 |
31/4 |
4 |
235,152 |
176,364 |
4,777 |
11,941 |
9,553 |
31/2 |
4 |
275,890 |
206,917 |
6,035 |
15,088 |
12,070 |
33/4 |
4 |
319,939 |
239,954 |
7,499 |
18,746 |
14,997 |
4 |
4 |
366,970 |
275,227 |
9,174 |
22,936 |
18,348 |
SAE Grade 2
Taille de boulon |
TPI |
Charge d'épreuve (lb) 1 |
Charge de serrage (lb) 2 |
Couple de serrage (ft-lbs) |
Galv + ciré |
Galv |
Plaine |
1/4 |
20 |
1,750 |
1,313 |
3 |
7 |
5 |
5/16 |
18 |
2,900 |
2,175 |
6 |
14 |
11 |
3/8 |
16 |
4,250 |
3,188 |
10 |
25 |
20 |
7/16 |
14 |
5,850 |
4,388 |
16 |
40 |
32 |
1/2 |
13 |
7,800 |
5,850 |
24 |
61 |
49 |
9/16 |
12 |
10,000 |
7,500 |
35 |
88 |
70 |
5/8 |
11 |
12,400 |
9,300 |
48 |
121 |
97 |
3/4 |
10 |
18,400 |
13,800 |
86 |
216 |
173 |
7/8 |
9 |
15,200 |
11,400 |
83 |
208 |
166 |
1 |
8 |
20,000 |
15,000 |
125 |
313 |
250 |
11/8 |
7 |
25,200 |
18,900 |
177 |
443 |
354 |
11/4 |
7 |
32,000 |
24,000 |
250 |
625 |
500 |
13/8 |
6 |
38,100 |
28,575 |
327 |
819 |
655 |
11/2 |
6 |
46,400 |
34,800 |
435 |
1,088 |
870 |
ASTM A325
Taille de boulon |
TPI |
Tension |
Plage de couple de serrage (ft-lbs) (Min - Max) |
Min |
Max |
Galv + ciré |
Plaine |
1/2 |
13 |
12,000 |
14,000 |
50 – 58 |
100 – 117 |
5/8 |
11 |
19,000 |
23,000 |
99 – 120 |
198 – 240 |
3/4 |
10 |
28,000 |
34,000 |
175 – 213 |
350 – 425 |
7/8 |
9 |
39,000 |
47,000 |
284 – 343 |
569 – 685 |
1 |
8 |
51,000 |
61,000 |
425 – 508 |
850 – 1,017 |
11/8 |
7 |
64,000 |
77,000 |
600 – 722 |
1,200 – 1,444 |
11/4 |
7 |
81,000 |
98,000 |
844 – 1,021 |
1,687 – 2,042 |
13/8 |
6 |
97,000 |
117,000 |
1,111 – 1,341 |
2,223 – 2,681 |
11/2 |
6 |
118,000 |
143,000 |
1,475 – 1,788 |
2,950 – 3,575 |
ASTM A449 / SAE Grade 5 *
Taille de boulon |
TPI |
Charge d'épreuve (lb) 1 |
Charge de serrage (lb) 2 |
Couple de serrage (ft-lbs) |
Galv + ciré |
Galv |
Plaine |
1/4 |
20 |
2,700 |
2,025 |
4 |
11 |
8 |
5/16 |
18 |
4,450 |
3,338 |
9 |
22 |
17 |
3/8 |
16 |
6,600 |
4,950 |
15 |
39 |
31 |
7/16 |
14 |
9,050 |
6,788 |
25 |
62 |
49 |
1/2 |
13 |
12,050 |
9,038 |
38 |
94 |
75 |
9/16 |
12 |
15,450 |
11,588 |
54 |
136 |
109 |
5/8 |
11 |
19,200 |
14,400 |
75 |
188 |
150 |
3/4 |
10 |
28,400 |
21,300 |
133 |
333 |
266 |
7/8 |
9 |
39,250 |
29,438 |
215 |
537 |
429 |
1 |
8 |
51,500 |
38,625 |
322 |
805 |
644 |
11/8 |
7 |
56,450 |
42,338 |
397 |
992 |
794 |
11/4 |
7 |
71,700 |
53,775 |
560 |
1,400 |
1,120 |
13/8 |
6 |
85,450 |
64,088 |
734 |
1,836 |
1,469 |
11/2 |
6 |
104,000 |
78,000 |
975 |
2,438 |
1,950 |
13/4 |
5 |
104,500 |
78,375 |
1,143 |
2,857 |
2,286 |
2 |
41/2 |
137,500 |
103,125 |
1,719 |
4,297 |
3,438 |
21/4 |
41/2 |
178,750 |
134,063 |
2,514 |
6,284 |
5,027 |
21/2 |
4 |
220,000 |
165,000 |
3,438 |
8,594 |
6,875 |
23/4 |
4 |
271,150 |
203,363 |
4,660 |
11,651 |
9,321 |
3 |
4 |
328,350 |
246,263 |
6,157 |
15,391 |
12,313 |
* Les boulons 429 de grade SAE J5 ne dépassent pas le diamètre 1-1 / 2 ″. |
ASTM A193 B7 / ASTM A320 L7 / ASTM A354 BC
Taille de boulon |
TPI |
Charge d'épreuve (lb) 1 |
Charge de serrage (lb) 2 |
Couple de serrage (ft-lbs) |
Galv + ciré |
Galv |
Plaine |
1/4 |
20 |
3,350 |
2,513 |
5 |
13 |
10 |
5/16 |
18 |
5,500 |
4,125 |
11 |
27 |
21 |
3/8 |
16 |
8,150 |
6,113 |
19 |
48 |
38 |
7/16 |
14 |
11,150 |
8,363 |
30 |
76 |
61 |
1/2 |
13 |
14,900 |
11,175 |
47 |
116 |
93 |
9/16 |
12 |
19,100 |
14,325 |
67 |
168 |
134 |
5/8 |
11 |
23,750 |
17,813 |
93 |
232 |
186 |
3/4 |
10 |
35,050 |
26,288 |
164 |
411 |
329 |
7/8 |
9 |
48,500 |
36,375 |
265 |
663 |
530 |
1 |
8 |
63,650 |
47,738 |
398 |
995 |
796 |
11/8 |
7 |
80,100 |
60,075 |
563 |
1,408 |
1,126 |
11/8 |
8 |
82,934 |
62,201 |
583 |
1,458 |
1,166 |
11/4 |
7 |
101,750 |
76,313 |
795 |
1,987 |
1,590 |
11/4 |
8 |
105,006 |
78,754 |
820 |
2,051 |
1,641 |
13/8 |
6 |
121,300 |
90,975 |
1,042 |
2,606 |
2,085 |
13/8 |
8 |
129,492 |
97,119 |
1,113 |
2,782 |
2,226 |
11/2 |
6 |
147,550 |
110,663 |
1,383 |
3,458 |
2,767 |
11/2 |
8 |
156,687 |
117,515 |
1,469 |
3,672 |
2,938 |
13/4 |
5 |
199,500 |
149,625 |
2,182 |
5,455 |
4,364 |
13/4 |
8 |
218,400 |
163,800 |
- |
- |
4,778 |
2 |
41/2 |
262,500 |
196,875 |
3,281 |
8,203 |
6,563 |
2 |
8 |
290,850 |
218,138 |
- |
- |
7,271 |
21/4 |
41/2 |
341,250 |
255,938 |
4,799 |
11,997 |
9,598 |
21/4 |
8 |
373,801 |
280,351 |
- |
- |
10,513 |
21/2 |
4 |
420,000 |
315,000 |
6,563 |
16,406 |
13,125 |
21/2 |
8 |
466,200 |
349,650 |
- |
- |
14,569 |
23/4 |
4 |
468,500 |
351,263 |
8,050 |
20,124 |
16,100 |
23/4 |
8 |
515,851 |
386,888 |
- |
- |
17,732 |
3 |
4 |
567,150 |
425,363 |
10,634 |
26,585 |
21,268 |
3 |
8 |
618,451 |
463,838 |
- |
- |
23,192 |
31/4 |
4 |
674,500 |
505,875 |
13,701 |
34,252 |
27,402 |
31/4 |
8 |
730,550 |
547,913 |
- |
- |
29,679 |
31/2 |
4 |
791,350 |
593,513 |
17,311 |
43,277 |
34,622 |
31/2 |
8 |
851,201 |
638,401 |
- |
- |
37,240 |
33/4 |
4 |
917700 |
688275 |
21,509 |
53,771 |
43,017 |
33/4 |
8 |
982,300 |
736,725 |
- |
- |
46,045 |
4 |
4 |
1052600 |
789450 |
26,315 |
65,788 |
52,630 |
4 |
8 |
1,121,950 |
841,463 |
- |
- |
56,098 |
ASTM A490
Taille de boulon |
TPI |
Tension (lb) |
Plage de couple de serrage (ft-lbs) (Min - Max) |
Min |
Max |
Plaine |
Lubrifié |
1/2 |
13 |
15,000 |
18,000 |
125 – 150 |
63 – 75 |
5/8 |
11 |
24,000 |
29,000 |
250 – 302 |
125 – 151 |
3/4 |
10 |
35,000 |
42,000 |
438 – 525 |
219 – 263 |
7/8 |
9 |
49,000 |
59,000 |
715 – 860 |
357 – 430 |
1 |
8 |
64,000 |
77,000 |
1,067 – 1,283 |
533 – 642 |
11/8 |
7 |
80,000 |
96,000 |
1,500 – 1,800 |
750 – 900 |
11/4 |
7 |
102,000 |
122,000 |
2,125 – 2,542 |
1,063 – 1,271 |
13/8 |
6 |
121,000 |
145,000 |
2,773 – 3,323 |
1,386 – 1,661 |
11/2 |
6 |
148,000 |
178,000 |
3,700 – 4,450 |
1,850 – 2,225 |
ASTM A354-BD / SAE Grade 8 *
Taille de boulon |
TPI |
Charge d'épreuve (lb) 1 |
Charge de serrage (lb) 2 |
Couple de serrage (ft-lbs) |
Plaine |
Lubrifié |
1/4 |
20 |
3,800 |
2,850 |
12 |
6 |
5/16 |
18 |
6,300 |
4,725 |
25 |
12 |
3/8 |
16 |
9,300 |
6,975 |
44 |
22 |
7/16 |
14 |
12,750 |
9,563 |
70 |
35 |
1/2 |
13 |
17,050 |
12,788 |
107 |
53 |
9/16 |
12 |
21,850 |
16,388 |
154 |
77 |
5/8 |
11 |
27,100 |
20,325 |
212 |
106 |
3/4 |
10 |
40,100 |
30,075 |
376 |
188 |
7/8 |
9 |
55,450 |
41,588 |
606 |
303 |
1 |
8 |
72,700 |
54,525 |
909 |
454 |
11/8 |
7 |
91,550 |
68,663 |
1,287 |
644 |
11/4 |
7 |
120,000 |
90,000 |
1,875 |
938 |
13/8 |
6 |
138,600 |
103,950 |
2,382 |
1,191 |
11/2 |
6 |
168,600 |
126,450 |
3,161 |
1,581 |
13/4 |
5 |
228,000 |
171,000 |
4,988 |
2,494 |
2 |
41/2 |
300,000 |
225,000 |
7,500 |
3,750 |
21/4 |
41/2 |
390,000 |
292,500 |
10,969 |
5,484 |
21/2 |
4 |
480,000 |
360,000 |
15,000 |
7,500 |
23/4 |
4 |
517,650 |
388,238 |
17,794 |
8,897 |
3 |
4 |
626,850 |
470,138 |
23,507 |
11,753 |
31/4 |
4 |
745,500 |
559,125 |
30,286 |
15,143 |
31/2 |
4 |
874,650 |
655,988 |
38,266 |
19,133 |
33/4 |
4 |
1,014,300 |
760,725 |
47,545 |
23,773 |
4 |
4 |
1,163,400 |
872,550 |
58,100 |
29,085 |
* Les boulons 429 de grade SAE J8 ne dépassent pas le diamètre 1-1 / 2 ″. |