The kilopound per square inch (ksi) is a unit of pressure that is not as commonly encountered as its smaller counterpart, pounds per square inch (psi). However, it plays a crucial role in engineering and materials science, particularly in the United States, where it is often used to express the tensile strength and yield strength of materials like steel. One ksi is equal to 1,000 psi, making it a convenient way to express large values of pressure or stress without cumbersome zeros.
Interestingly, ksi is commonly used in the context of measuring the mechanical properties of metals, especially in aerospace and automotive industries. These are fields where precise and robust materials are essential for safety and performance. For instance, typical structural steel can have a yield strength on the order of 50 ksi, underscoring the immense stress materials can withstand in such applications. Understanding these units helps engineers ensure that the materials used can handle the demanding conditions they face.
The “bar” is a metric unit of pressure, commonly used in meteorology to describe atmospheric pressure — one bar is approximately equal to the atmospheric pressure on Earth at sea level. Interestingly, the term “bar” originates from the Greek word “baros,” meaning weight. This unit is not only practical for forecasting weather but also critical in various scientific fields, such as oceanography and engineering, where accurate pressure measurements are crucial.
A fascinating aspect of the bar is its application in scuba diving. Divers often use bar to read their submersible pressure gauges to monitor air consumption. Moreover, understanding bar pressure changes is essential in deep-sea diving to avoid decompression sickness, a condition caused by rapid changes in pressure. Thus, the bar is a pivotal unit in both scientific and everyday contexts.
Kilopound per square inch | Bar |
---|---|
0
ksi
|
0
bar
|
0.1
ksi
|
6.89476
bar
|
0.2
ksi
|
13.78952
bar
|
0.3
ksi
|
20.68428
bar
|
0.4
ksi
|
27.57904
bar
|
0.5
ksi
|
34.4738
bar
|
0.6
ksi
|
41.36856
bar
|
0.7
ksi
|
48.26332
bar
|
0.8
ksi
|
55.15808
bar
|
0.9
ksi
|
62.05284
bar
|
1
ksi
|
68.9476
bar
|
1.1
ksi
|
75.84236
bar
|
1.2
ksi
|
82.73712
bar
|
1.3
ksi
|
89.63188
bar
|
1.4
ksi
|
96.52664
bar
|
1.5
ksi
|
103.4214
bar
|
1.6
ksi
|
110.31616
bar
|
1.7
ksi
|
117.21092
bar
|
1.8
ksi
|
124.10568
bar
|
1.9
ksi
|
131.00044
bar
|
2
ksi
|
137.8952
bar
|
2.1
ksi
|
144.78996
bar
|
2.2
ksi
|
151.68472
bar
|
2.3
ksi
|
158.57948
bar
|
2.4
ksi
|
165.47424
bar
|
2.5
ksi
|
172.369
bar
|
2.6
ksi
|
179.26376
bar
|
2.7
ksi
|
186.15852
bar
|
2.8
ksi
|
193.05328
bar
|
2.9
ksi
|
199.94804
bar
|
3
ksi
|
206.8428
bar
|
3.1
ksi
|
213.73756
bar
|
3.2
ksi
|
220.63232
bar
|
3.3
ksi
|
227.52708
bar
|
3.4
ksi
|
234.42184
bar
|
3.5
ksi
|
241.3166
bar
|
3.6
ksi
|
248.21136
bar
|
3.7
ksi
|
255.10612
bar
|
3.8
ksi
|
262.00088
bar
|
3.9
ksi
|
268.89564
bar
|
4
ksi
|
275.7904
bar
|
4.1
ksi
|
282.68516
bar
|
4.2
ksi
|
289.57992
bar
|
4.3
ksi
|
296.47468
bar
|
4.4
ksi
|
303.36944
bar
|
4.5
ksi
|
310.2642
bar
|
4.6
ksi
|
317.15896
bar
|
4.7
ksi
|
324.05372
bar
|
4.8
ksi
|
330.94848
bar
|
4.9
ksi
|
337.84324
bar
|
5
ksi
|
344.738
bar
|
5.1
ksi
|
351.63276
bar
|
5.2
ksi
|
358.52752
bar
|
5.3
ksi
|
365.42228
bar
|
5.4
ksi
|
372.31704
bar
|
5.5
ksi
|
379.2118
bar
|
5.6
ksi
|
386.10656
bar
|
5.7
ksi
|
393.00132
bar
|
5.8
ksi
|
399.89608
bar
|
5.9
ksi
|
406.79084
bar
|
6
ksi
|
413.6856
bar
|
6.1
ksi
|
420.58036
bar
|
6.2
ksi
|
427.47512
bar
|
6.3
ksi
|
434.36988
bar
|
6.4
ksi
|
441.26464
bar
|
6.5
ksi
|
448.1594
bar
|
6.6
ksi
|
455.05416
bar
|
6.7
ksi
|
461.94892
bar
|
6.8
ksi
|
468.84368
bar
|
6.9
ksi
|
475.73844
bar
|
7
ksi
|
482.6332
bar
|
7.1
ksi
|
489.52796
bar
|
7.2
ksi
|
496.42272
bar
|
7.3
ksi
|
503.31748
bar
|
7.4
ksi
|
510.21224
bar
|
7.5
ksi
|
517.107
bar
|
7.6
ksi
|
524.00176
bar
|
7.7
ksi
|
530.89652
bar
|
7.8
ksi
|
537.79128
bar
|
7.9
ksi
|
544.68604
bar
|
8
ksi
|
551.5808
bar
|
8.1
ksi
|
558.47556
bar
|
8.2
ksi
|
565.37032
bar
|
8.3
ksi
|
572.26508
bar
|
8.4
ksi
|
579.15984
bar
|
8.5
ksi
|
586.0546
bar
|
8.6
ksi
|
592.94936
bar
|
8.7
ksi
|
599.84412
bar
|
8.8
ksi
|
606.73888
bar
|
8.9
ksi
|
613.63364
bar
|
9
ksi
|
620.5284
bar
|
9.1
ksi
|
627.42316
bar
|
9.2
ksi
|
634.31792
bar
|
9.3
ksi
|
641.21268
bar
|
9.4
ksi
|
648.10744
bar
|
9.5
ksi
|
655.0022
bar
|
9.6
ksi
|
661.89696
bar
|
9.7
ksi
|
668.79172
bar
|
9.8
ksi
|
675.68648
bar
|
9.9
ksi
|
682.58124
bar
|
10
ksi
|
689.476
bar
|
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