Customer satisfaction built with steel

Tube

Structural Tubing is a hollow section most commonly constructed from hot rolled metal coils.  The coils are slit to the proper width for the section being manufactured and then formed into the final shape needed.  Once the size is formed and the seams are welded together the tube is cut to the desired length to make a single piece of tubing.  Structural tubing is offered in round, rectangular and square shapes.

Structural tubing is relatively low in cost, has a high strength-to-weight ratio and is easily welded, formed, punched, and drilled.  Its hollow shape protects and conceals wires, pipes, moving parts and it can be left exposed.  Additionally it can offer a lightweight alternative to solid steel products such as I-Beams and Wide Flange.  Infra-Metals offers many different sizes, lengths and specifications for Structural Tubing.

Specifications

ASTM – 500 – Standard specification for cold-formed welded and seamless carbon steel structural tubing in rounds and shapes .  This specification covers cold-formed steel round, square, rectangular, or special shape structural tubing for welded, riveted, or bolted construction of bridges and buildings, and for general structural purposes.  Four grades are produced each having a different chemistry and tensile requirement.

Grades B and C, being the most common stock available, can be subjected to most of the usual fabricating operations.  Ductility is good.  Bends well, flattens, cuts, punches, flares, flanges and welds easily.

Square Tubing

square

  Carbon Steel  
Size in Average Wall Wt. Per Ft

Inches

Gauge

Decimal

in lbs.

1/2 x 1/2

16

0.065

0.385

14

0.083

0.470

3/4 x 3/4

16

0.065

0.605

14

0.083

0.753

11

0.120

1.030

1 x 1

1/8

0.125

1.028

16

0.065

0.827

14

0.083

1.035

1/8

0.125

1.436

1 1/4 x 1 1/4

16

0.065

1.048

14

0.083

1.317

1/8

0.125

1.844

3/16

0.188

2.62

1/4

0.250

4.11

1 1/2 x 1 1/2

16

0.065

1.269

14

0.083

1.60

1/8

0.125

2.252

3/16

0.188

3.23

1/4

0.250

4.11

1 3/4 x 1 3/4

16

0.065

1.49

14

0.083

1.88

1/8

0.125

2.66

3/16

0.188

3.99

2 x 2

16

0.065

1.7103

14

0.083

2.163

1/8

0.125

3.067

3/16

0.188

4.32

5/16

0.313

6.32

1/4

0.250

5.41

2 1/2 x 2 1/2

16

0.065

2.15

14

0.083

2.73

1/8

0.125

3.90

3/16

0.188

5.59

1/4

0.250

7.11

5/16

0.313

8.43

  Carbon Steel  
Size in Average Wall Wt. Per Ft

Inches

Gauge

Decimal

in lbs.

3 x 3

16

0.065

2.59

14

0.083

3.26

1/8

0.125

4.75

3/16

0.188

6.87

1/4

0.250

8.81

5/16

0.313

10.58

 3 1/2 x 3 1/2

14

0.083

3.80

1/8

0.125

5.61

3/16

0.188

8.15

1/4

0.250

10.51

5/16

0.313

12.70

3/8

0.375

14.72

4 x 4

1/8

0.125

6.46

3/16

0.188

9.52

1/4

0.250

12.21

5/16

0.313

14.83

3/8

0.375

17.27

1/2

0.500

21.63

  Carbon Steel  
Size in Average Wall Wt. Per Ft

Inches

Gauge

Decimal

in lbs.

4 1/2 x 4 1/2

3/16

0.188

10.70

1/4

0.250

13.91

5/16

0.313

16.96

3/8

0.375

19.82

1/2

0.500

25.03

5 x 5

3/16

0.188

11.97

1/4

0.250

15.62

5/16

0.313

19.08

3/8

0.375

22.37

1/2

0.500

28.43

5/8

0.625

33.76

5 1/2 x 5 1/2

3/16

0.188

13.30

1/4

.250

17.32

5/16

0.313

21.22

3/8

0.375

24.93

1/2

0.500

31.84

6 x 6

3/16

0.188

14.53

1/4

0.250

19.02

5/16

0.313

23.34

3/8

0.375

27.48

1/2

0.500

35.24

5/8

0.625

42.30

7 x 7

3/16

0.188

17.08

1/4

0.250

22.42

5/16

0.313

27.59

3/8

0.375

32.58

1/2

0.500

42.05

5/8

0.625

50.81

Square Tubing

square

  Carbon Steel  
Size in Average Wall Wt. Per Ft

Inches

Gauge

Decimal

in lbs.

8 x 8

3/16

0.188

19.63

1/4

0.250

25.82

5/16

0.313

31.84

3/8

0.375

37.69

1/2

0.500

48.85

5/8

0.625

59.32

9 x 9

1/4

0.250

29.23

5/16

0.313

36.12

3/8

0.375

42.79

1/2

0.500

55.66

5/8

0.625

67.82

10 x 10

3/16

0.188

24.73

1/4

0.250

32.63

5/16

0.313

40.35

3/8

0.375

47.90

1/2

0.500

62.46

5/8

0.625

76.33

12 x 12

3/16

0.188

29.84

1/4

0.250

39.43

5/16

0.313

48.86

3/8

0.375

58.10

1/2

0.500

76.07

5/8

0.625

93.34

14 x 14

5/16

0.313

57.36

3/8

0.375

68.31

1/2

0.500

89.68

5/8

0.625

110.36

16 x 16

5/16

0.313

65.87

3/8

0.375

78.52

1/2

0.500

103.30

5/8

0.625

127.37

Rectangular Tubing

rectangle

  Carbon Steel  
Size in Average Wall Wt. Per Ft

Inches

Gauge

Decimal

in lbs.

1 1/2 x 1

16

0.065

1.05

14

0.083

1.32

2 x 1 1/2

1/8

0.125

1.84

16

0.065

1.27

14

0.083

1.60

1/8

0.125

2.25

3/16

0.188

3.40

2 x 1 1/2

16

0.065

1.49

14

0.083

1.88

1/8

0.125

2.63

3/16

0.188

3.68

2 1/2 x 1

16

0.065

1.49

14

0.083

1.88

1/8

0.125

2.66

2 1/2 x 1 1/2

16

0.065

1.69

14

0.083

2.16

1/8

0.125

3.06

3/16

0.188

4.32

1/4

0.250

5.41

3 x 1 1/2

16

0.065

1.71

14

0.083

2.16

1/8

0.125

3.06

3/16

0.188

4.23

1/4

0.250

5.41

3 x 1 1/2

16

0.065

1.93

14

0.083

2.45

1/8

0.125

3.76

3/16

0.188

4.97

3 x 2

16

0.065

2.15

14

0.083

2.73

1/8

0.125

3.90

3/16

0.188

5.59

1/4

0.250

7.11

5/16

0.313

8.45

3 x 2 1/2

14

0.083

3.01

1/8

0.125

4.29

3/16

0.188

6.29

1/4

0.250

7.96

  Carbon Steel  
Size in Average Wall Wt. Per Ft

Inches

Gauge

Decimal

in lbs.

3 1/2 x 1 1/2

16

0.065

2.15

14

0.083

2.75

1/8

0.125

3.90

3/16

0.188

5.59

1/4

0.250

7.11

3 1/2 x 2

14

0.083

3.01

1/8

0.125

4.29

3/16

0.188

6.29

3 1/2 x 2 1/2

16

0.065

2.59

14

0.083

3.26

1/8

0.125

4.75

3/16

0.188

6.87

1/4

0.250

8.81

5/16

0.313

10.58

4 x 2

16

0.065

2.59

14

0.083

3.29

1/8

0.125

4.75

3/16

0.188

6.87

1/4

0.250

8.81

5/16

0.313

10.58

3/8

0.375

12.17

4 x 2 1/2

14

0.083

3.55

1/8

0.125

5.18

3/16

0.188

7.51

1/4

0.250

9.66

4 x 3

14

0.083

3.80

1/8

0.125

5.61

3/16

0.188

8.15

1/4

0.250

10.51

5/16

0.313

12.70

3/8

0.375

14.71

4 1/2 x 2

14

0.083

3.55

1/8

0.125

5.11

3/16

0.188

7.48

1/4

0.250

9.65

5 x 2

14

0.083

3.80

1/8

0.125

5.61

3/16

0.188

8.15

1/4

0.250

10.51

5/16

0.313

12.70

3/8

0.375

14.71

Rectangular Tubing

rectangle

  Carbon Steel  
Size in Average Wall Wt. Per Ft

Inches

Gauge

Decimal

in lbs.

5 x 2 1/2

1/8

0.125

6.03

3/16

0.188

8.78

1/4

0.250

11.36

5 x 3

1/8

1.250

6.46

3/16

1.880

9.42

1/4

0.250

12.21

5/16

0.313

14.83

3/8

0.357

17.27

1/2

0.500

21.63

5/8

0.625

25.26

5 x 4

1/8

0.125

7.31

3/16

0.188

10.70

1/4

0.250

13.91

5/16

0.313

16.96

3/8

0.375

19.82

1/2

0.500

25.03

6 x 2

1/8

0.125

6.46

3/16

0.188

9.42

1/4

0.250

12.21

5/16

0.313

14.83

3/8

0.375

17.27

1/2

0.500

21.63

5/8

0.625

25.26

6 x 3

1/8

0.125

7.31

3/16

0.188

10.70

1/4

0.250

13.91

5/16

0.313

16.96

3/8

0.375

19.82

1/2

0.500

25.03

6 x 4

1/8

0.125

8.16

3/16

0.188

11.97

1/4

0.250

15.62

5/16

0.313

19.08

3/8

0.375

22.37

1/2

0.500

28.43

  Carbon Steel  
Size in Average Wall Wt. Per Ft

Inches

Gauge

Decimal

in lbs.

6 x 5

3/16

0.188

13.30

1/4

0.250

17.32

5/16

0.313

21.22

3/8

0.375

24.93

1/2

0.500

31.84

7 x 3

3/16

0.188

11.97

1/4

0.250

15.62

5/16

0.313

19.08

3/8

0.375

22.37

1/2

0.500

28.43

7 x 4

3/16

0.188

13.30

1/4

0.250

17.32

5/16

0.313

21.22

3/8

0.375

24.93

1/2

0.500

31.84

7 x 5

3/16

0.188

14.53

1/4

0.250

19.02

5/16

0.313

23.34

3/8

0.375

27.48

1/2

0.500

35.24

5/8

0.625

42.30

8 x 2

3/16

0.188

11.97

1/4

0.250

15.62

5/16

0.313

19.08

3/8

0.375

22.37

8 x 3

3/16

0.188

13.30

1/4

0.250

17.32

5/16

0.313

21.22

3/8

0.375

24.93

1/2

0.500

31.81

8 x 4

3/16

0.188

14.53

1/4

0.250

19.02

5/16

0.313

23.34

3/8

0.375

27.48

1/2

0.500

35.24

5/8

0.625

42.26

8 x 6

3/16

0.188

17.11

1/4

0.250

22.42

5/16

0.313

27.59

3/8

0.375

32.58

1/2

0.500

42.05

5/8

0.625

50.81

Rectangular Tubing

rectangle

  Carbon Steel  
Size in Average Wall Wt. Per Ft

Inches

Gauge

Decimal

in lbs.

9 x 3

1/4

0.250

19.02

5/16

0.313

23.34

3/8

0.375

27.48

1/2

0.500

35.24

9 x 5

5/16

0.313

27.59

3/8

0.375

32.58

1/4

0.250

22.42

1/2

0.500

42.05

5/8

0.625

50.81

9 x 7

3/16

0.188

19.63

1/4

0.250

25.82

5/16

0.313

31.86

3/8

0.375

37.69

1/2

0.500

48.85

5/8

0.625

59.32

10 x 2

3/16

0.188

14.55

1/4

0.250

19.02

5/16

0.313

23.34

3/8

0.375

27.48

10 x 3

3/16

0.188

15.80

1/4

0.250

20.72

5/16

0.313

25.46

3/8

0.375

30.03

  Carbon Steel  
Size in Average Wall Wt. Per Ft

Inches

Gauge

Decimal

in lbs.

10 x 4

3/16

0.188

17.08

1/4

0.250

22.42

5/16

0.313

27.59

3/8

0.375

32.58

1/2

0.500

42.05

5/8

0.625

50.76

10 x 5

3/16

0.188

18.35

1/4

0.250

24.12

5/16

0.313

29.72

3/8

0.375

35.13

1/2

0.500

45.45

10 x 6

3/16

0.188

19.66

1/4

0.250

25.82

5/16

0.313

31.84

3/8

0.375

37.69

1/2

0.500

48.85

5/8

0.625

59.32

10 x 8

3/16

0.188

22.22

1/4

0.250

29.23

5/16

0.313

36.10

3/8

0.375

42.79

1/2

0.500

55.66

12 x 2

3/16

0.188

17.11

1/4

0.250

22.42

5/16

0.313

27.59

3/8

0.375

32.58

12 x 3

3/16

0.188

18.40

1/4

0.250

24.10

5/16

0.313

29.70

3/8

0.375

35.13

12 x 4

3/16

0.188

19.66

1/4

0.250

25.82

5/16

0.313

31.84

3/8

0.375

37.69

1/2

0.500

48.85

5/8

0.625

59.32

  Carbon Steel  
Size in Average Wall Wt. Per Ft

Inches

Gauge

Decimal

in lbs.

12 x 6

3/16

0.188

22.22

1/4

0.250

29.23

5/16

0.313

36.10

3/8

0.375

42.79

1/2

0.500

55.66

5/8

0.625

67.82

12 x 8

3/16

0.188

24.77

1/4

0.250

32.63

5/16

0.313

40.35

3/8

0.375

47.90

1/2

0.500

62.46

5/8

0.625

76.33

12 x 10

1/4

0.250

36.03

5/16

0.313

44.70

3/8

0.375

53.00

1/2

0.500

69.27

14 x 4

3/16

0.188

22.22

1/4

0.250

29.23

5/16

0.313

36.10

3/8

0.375

42.79

1/2

0.500

55.66

5/8

0.625

67.82

14 x 6

3/16

0.188

24.77

1/4

0.250

32.63

5/16

0.313

40.35

3/8

0.375

47.90

1/2

0.500

62.46

5/8

0.625

76.33

14 x 10

1/4

0.250

39.43

5/16

0.313

48.86

3/8

0.375

58.10

1/2

0.500

76.07

5/8

0.625

93.34

  Carbon Steel  
Size in Average Wall Wt. Per Ft

Inches

Gauge

Decimal

in lbs.

16 x 4

1/4

0.250

32.63

5/16

0.313

40.35

3/8

0.375

47.90

1/2

0.500

62.46

5/8

0.625

76.33

16 x 8

1/4

0.250

39.43

5/16

0.313

48.86

3/8

0.375

58.10

1/2

0.500

76.07

5/8

0.625

93.34

16 x 12

5/16

0.313

57.36

3/8

0.375

68.31

1/2

0.500

89.68

5/8

0.625

110.36

18 x 6

1/4

0.250

39.43

5/16

0.313

48.86

3/8

0.375

58.10

1/2

0.500

76.07

5/8

0.625

93.34

20 x 4

1/4

0.250

39.43

5/16

0.313

48.86

3/8

0.375

58.10

1/2

0.500

76.07

20 x 8

5/16

0.313

57.36

3/8

0.375

68.31

1/2

0.500

89.68

5/8

0.625

110.36

20 x 12

5/16

0.313

65.87

3/8

0.375

78.52

1/2

0.500

103.30

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