Iminungkahing Mga Simula sa Pagpapahalaga
Ang nasa ibaba tinantyang pagkalkula ng metalikang kuwintas ay inaalok lamang bilang isang gabay. Ang paggamit ng nilalaman nito ng sinuman ay ang nag-iisang responsibilidad ng taong iyon at ipinapalagay nila ang lahat ng panganib.
Dahil sa maraming mga variable na nakakaapekto sa relasyon sa metalikang pag-igting tulad ng pagkakamali ng tao, texture sa ibabaw, at pagpapadulas ang tanging paraan upang matukoy ang tamang metalikang kuwintas ay sa pamamagitan ng eksperimento sa ilalim ng aktwal na mga kondisyon ng pinagsamang at pagpupulong.
ASTM A307
Sukat ng Bolt |
TPI |
Proof Load (lbs)1 |
Mag-load ng Clamp (lbs)2 |
Pagpapahiwatig ng Torque (ft-lbs) |
Galv + Waxed |
Galv |
payak |
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
Sukat ng Bolt |
TPI |
Proof Load (lbs) 1 |
Mag-load ng Clamp (lbs) 2 |
Pagpapahiwatig ng Torque (ft-lbs) |
Galv + Waxed |
Galv |
payak |
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
Sukat ng Bolt |
TPI |
Pag-igting |
Pahigpit na Saklaw ng Torque (ft-lbs) (Min - Max) |
Min |
Max |
Galv + Waxed |
payak |
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 Baitang 5 *
Sukat ng Bolt |
TPI |
Proof Load (lbs) 1 |
Mag-load ng Clamp (lbs) 2 |
Pagpapahiwatig ng Torque (ft-lbs) |
Galv + Waxed |
Galv |
payak |
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 |
* Ang SAE J429 grade 5 bolts ay hindi lalampas sa 1-1 / 2 ″ diameter. |
ASTM A193 B7 / ASTM A320 L7 / ASTM A354 BC
Sukat ng Bolt |
TPI |
Proof Load (lbs) 1 |
Mag-load ng Clamp (lbs) 2 |
Pagpapahiwatig ng Torque (ft-lbs) |
Galv + Waxed |
Galv |
payak |
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
Sukat ng Bolt |
TPI |
Tensiyon (lbs) |
Pahigpit na Saklaw ng Torque (ft-lbs) (Min - Max) |
Min |
Max |
payak |
Lubricated |
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 Baitang 8 *
Sukat ng Bolt |
TPI |
Proof Load (lbs) 1 |
Mag-load ng Clamp (lbs) 2 |
Pagpapahiwatig ng Torque (ft-lbs) |
payak |
Lubricated |
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 |
* Ang SAE J429 grade 8 bolts ay hindi lalampas sa 1-1 / 2 ″ diameter. |