Trick-Tools
Useful Calculations
Following are some
useful fomulas and charts related to common fabricating questions. We
hope you can find them useful. Check back often as we plan to continue
adding to the list!
Materials Tensile Strength Comparison (approximate psi)
|
| 5052 Aluminum |
30,000 |
| Mild steel tube (HREW) |
40,000 |
| 6061 Aluminum |
45,000 |
| Black iron pipe |
47,000 |
| 304 Stainless steel |
65,000 |
| DOM Steel |
75,000 |
| 4130 Chromoly |
100,000 |
Length of tube
consumed in a bend =
CLR(center line radius) x DOB (degree of bend) x .01745
Circumference
of a circle = 3.14 x Diameter
Weight of steel
tubing in lbs per foot = 10.6802 x wall thickness x (diameter -
wall thickness)
Multiply inches x 25.4 to get millimeters
Multiply millimeters x .03937 to get inches
| Gauge |
Wall
Thickness - based on 1" tube |
| 22 |
.0312 |
| 21 |
.0344 |
| 20 |
.0375 |
| 19 |
.0437 |
| 18 |
.0500 |
| 17 |
.0562 |
| 16 |
.0625 |
| 15 |
.0703 |
| 14 |
.0781 |
| 13 |
.0937 |
| 12 |
.1094
|
| 11 |
.1250 |
| 10 |
.1406 |
| 9 |
.1562 |
| 8 |
.1719 |
| 7 |
.1875 |
| 6 |
.2031 |
| 5 |
.2187 |
| 4 |
.2344 |
| 3 |
.2500 |
|
Nominal Pipe Size
|
Outside Diameter
|
Nominal
Pipe Sizes Wall Thickness
|
|
Sch. 5
|
Sch. 10
|
Sch. 40
|
Sch. 80
|
Sch. 160
|
XXS
|
|
1/4"
|
0.540"
|
N/A
|
.065
|
.088
|
.119
|
N/A
|
N/A
|
|
3/8"
|
0.675"
|
N/A
|
.065
|
.091
|
.126
|
N/A
|
N/A
|
|
1/2"
|
0.840"
|
.065
|
.083
|
.109
|
.147
|
.187
|
.294
|
|
3/4"
|
1.050"
|
.065
|
.083
|
.113
|
.154
|
.218
|
.308
|
|
1"
|
1.315"
|
.065
|
.109
|
.133
|
.179
|
.250
|
.358
|
|
1-1/4"
|
1.660"
|
.065
|
.109
|
.140
|
.191
|
.250
|
.382
|
|
1-1/2"
|
1.900"
|
.065
|
.109
|
.145
|
.200
|
.281
|
.400
|
|
2"
|
2.375"
|
.066
|
.109
|
.164
|
.218
|
.343
|
.436
|
|
2-1/2"
|
2.875"
|
.083
|
.120
|
.203
|
.276
|
.375
|
.552
|
|
