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Carbon Steel Square Tube

-63 Products

Carbon Steel Product Guide Product

Carbon steel square tubing is used in a variety of applications including building construction, manufacturing, and general fabrication. We carry carbon steel square tubing in A500/A513 hot-rolled steel square tube and 1018 cold-rolled steel square tube. So, whether you need workhorse hot-rolled steel tubing or the smooth, shiny finish of cold-rolled steel, Online Metals has the product you need. Price and order online and have your carbon steel square tube delivered directly to you.

 

A500-A513 square tube is stocked in most sizes at our metal supply warehouses in Portland, Dallas, Atlanta, Wallingford, Toledo, and Los Angeles. Standard lengths and cut to size are available.

 

We carry Carbon Steel Square Tube in 1018 Metric | A500-A513

 

Relevant Knowledge Hub Resources: 5 Reasons to Cut to Size | Hot Roll vs Cold Roll Steel

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20mm x 2mm Carbon Steel Square Tube 1018 Metric 60" Length [+/- 2"] - 
Part #: 22481

20mm x 2mm Carbon Steel Square Tube 1018 Metric 60" Length [+/- 2"] -
Part #: 22481

Click for more details

mild-steel-square-tube-metric-1018-1superZoom

Dimensions

  • Height: 20mm
  • Wall: 2mm
See all available dimensions for this product

Pack of 3

QTY

$205.45 ea.
$205.45

30mm x 3mm Carbon Steel Square Tube 1018 Metric 60" Length [+/- 2"] - 
Part #: 22482

30mm x 3mm Carbon Steel Square Tube 1018 Metric 60" Length [+/- 2"] -
Part #: 22482

Click for more details

mild-steel-square-tube-metric-1018-1superZoom

Dimensions

  • Height: 30mm
  • Wall: 3mm
See all available dimensions for this product

Pack of 2

QTY

$251.47 ea.
$251.47

30mm x 2mm Carbon Steel Square Tube 1018 Metric 60" Length [+/- 2"] - 
Part #: 22483

30mm x 2mm Carbon Steel Square Tube 1018 Metric 60" Length [+/- 2"] -
Part #: 22483

Click for more details

mild-steel-square-tube-metric-1018-1superZoom

Dimensions

  • Height: 30mm
  • Wall: 2mm
See all available dimensions for this product

Pack of 2

QTY

$174.61 ea.
$174.61

50mm x 3mm Carbon Steel Square Tube 1018 Metric 60" Length [+/- 2"] - 
Part #: 22489

50mm x 3mm Carbon Steel Square Tube 1018 Metric 60" Length [+/- 2"] -
Part #: 22489

Click for more details

mild-steel-square-tube-metric-1018-1superZoom

Dimensions

  • Height: 50mm
  • Wall: 3mm
See all available dimensions for this product

Pack of 1

QTY

$221.32 ea.
$221.32

40mm x 4mm Carbon Steel Square Tube 1018 Metric 60" Length [+/- 2"] - 
Part #: 22488

40mm x 4mm Carbon Steel Square Tube 1018 Metric 60" Length [+/- 2"] -
Part #: 22488

Click for more details

mild-steel-square-tube-metric-1018-1superZoom

Dimensions

  • Height: 40mm
  • Wall: 4mm
See all available dimensions for this product

Pack of 1

QTY

$223.55 ea.
$223.55

40mm x 3mm Carbon Steel Square Tube 1018 Metric 60" Length [+/- 2"] - 
Part #: 22487

40mm x 3mm Carbon Steel Square Tube 1018 Metric 60" Length [+/- 2"] -
Part #: 22487

Click for more details

mild-steel-square-tube-metric-1018-1superZoom

Dimensions

  • Height: 40mm
  • Wall: 3mm
See all available dimensions for this product

Pack of 1

QTY

$173.92 ea.
$173.92

50mm x 4mm Carbon Steel Square Tube 1018 Metric 60" Length [+/- 2"] - 
Part #: 22490

50mm x 4mm Carbon Steel Square Tube 1018 Metric 60" Length [+/- 2"] -
Part #: 22490

Click for more details

mild-steel-square-tube-metric-1018-1superZoom

Dimensions

  • Height: 50mm
  • Wall: 4mm
See all available dimensions for this product

Pack of 1

QTY

$287.56 ea.
$287.56

60mm x 4mm Carbon Steel Square Tube 1018 Metric 60" Length [+/- 2"] - 
Part #: 22491

60mm x 4mm Carbon Steel Square Tube 1018 Metric 60" Length [+/- 2"] -
Part #: 22491

Click for more details

mild-steel-square-tube-metric-1018-1superZoom

Dimensions

  • Height: 60mm
  • Wall: 4mm
See all available dimensions for this product

Pack of 1

QTY

$350.77 ea.
$350.77

80mm x 3mm Carbon Steel Square Tube 1018 Metric 60" Length [+/- 2"] - 
Part #: 22493

80mm x 3mm Carbon Steel Square Tube 1018 Metric 60" Length [+/- 2"] -
Part #: 22493

Click for more details

mild-steel-square-tube-metric-1018-1superZoom

Dimensions

  • Height: 80mm
  • Wall: 3mm
See all available dimensions for this product

Pack of 1

QTY

$303.61 ea.
$303.61

60mm x 5mm Carbon Steel Square Tube 1018 Metric 60" Length [+/- 2"] - 
Part #: 22492

60mm x 5mm Carbon Steel Square Tube 1018 Metric 60" Length [+/- 2"] -
Part #: 22492

Click for more details

mild-steel-square-tube-metric-1018-1superZoom

Dimensions

  • Height: 60mm
  • Wall: 5mm
See all available dimensions for this product

Pack of 1

QTY

$363.21 ea.
$363.21

80mm x 4mm Carbon Steel Square Tube 1018 Metric 60" Length [+/- 2"] - 
Part #: 22494

80mm x 4mm Carbon Steel Square Tube 1018 Metric 60" Length [+/- 2"] -
Part #: 22494

Click for more details

mild-steel-square-tube-metric-1018-1superZoom

Dimensions

  • Height: 80mm
  • Wall: 4mm
See all available dimensions for this product

Pack of 1

QTY

$400.85 ea.
$400.85

25mm x 2mm Carbon Steel Square Tube 1018 Metric 120" Length [+/- 2"] - 
Part #: 23559

25mm x 2mm Carbon Steel Square Tube 1018 Metric 120" Length [+/- 2"] -
Part #: 23559

Click for more details

mild-steel-square-tube-metric-1018-1superZoom

Dimensions

  • Height: 25mm
  • Wall: 2mm
See all available dimensions for this product

Pack of 1

QTY

$139.01 ea.
$139.01

1/2" x 0.065" Carbon Steel Square Tube A500/A513 Hot Rolled - 
Part #: 10287

1/2" x 0.065" Carbon Steel Square Tube A500/A513 Hot Rolled -
Part #: 10287

Click for more details

mild-steel-square-tube-hot-rolled-a500-1superZoom

Dimensions

  • Height: 0.5"
  • Wall: 0.065"
See all available dimensions for this product
  • 12″ (1 ft.) - $4.50 ea.
  • 24″ (2 ft.) - $4.73 ea.
  • 36″ (3 ft.) - $5.05 ea.

    Buy 4 at the 12 ft price!

  • 48″ (4 ft.) - $6.32 ea.
  • 72″ (6 ft.) - $8.91 ea.
  • 96″ (8 ft.) - $11.11 ea.
  • 144″ (12 ft.) - $13.83 ea.
  • 240″ (20 ft.) - $23.05 ea. -LTL freight rates apply
  • 288″ (24 ft.) - $27.64 ea. LTL freight starting at $245 on all lengths greater than 96"
Best shipping value:
Single Heat Lot Required
Why are heat lots important?
Heat lots ensure consistent metal properties, full traceability, and quality control, which are critical for precision and reliability in your projects.

By selecting "Single Heat Lot Required" option, we ensure all cut pieces are sourced from a single heat lot for consistency in material characteristics.
Create Custom Cut

QTY

$4.50 ea.
$4.50 for 1

3/4" x 0.065" Carbon Steel Square Tube A500/A513 Hot Rolled - 
Part #: 10291

3/4" x 0.065" Carbon Steel Square Tube A500/A513 Hot Rolled -
Part #: 10291

Click for more details

mild-steel-square-tube-hot-rolled-a500-1superZoom

Dimensions

  • Height: 0.75"
  • Wall: 0.065"
See all available dimensions for this product
  • 12″ (1 ft.) - $4.50 ea.
  • 24″ (2 ft.) - $4.73 ea.
  • 36″ (3 ft.) - $5.12 ea.

    Buy 4 at the 12 ft price!

  • 48″ (4 ft.) - $6.39 ea.
  • 72″ (6 ft.) - $9.04 ea.
  • 96″ (8 ft.) - $11.25 ea.
  • 144″ (12 ft.) - $14.00 ea.
  • 240″ (20 ft.) - $23.34 ea. -LTL freight rates apply
  • 288″ (24 ft.) - $28.02 ea. LTL freight starting at $245 on all lengths greater than 96"
Best shipping value:
Single Heat Lot Required
Why are heat lots important?
Heat lots ensure consistent metal properties, full traceability, and quality control, which are critical for precision and reliability in your projects.

By selecting "Single Heat Lot Required" option, we ensure all cut pieces are sourced from a single heat lot for consistency in material characteristics.
Create Custom Cut

QTY

$4.50 ea.
$4.50 for 1

3/4" x 0.12" Carbon Steel Square Tube A500/A513 Hot Rolled - 
Part #: 10295

3/4" x 0.12" Carbon Steel Square Tube A500/A513 Hot Rolled -
Part #: 10295

Click for more details

mild-steel-square-tube-hot-rolled-a500-1superZoom

Dimensions

  • Height: 0.75"
  • Wall: 0.12"
See all available dimensions for this product
  • 12″ (1 ft.) - $4.50 ea.
  • 24″ (2 ft.) - $8.54 ea.
  • 36″ (3 ft.) - $11.67 ea.

    Buy 4 at the 12 ft price!

  • 48″ (4 ft.) - $14.56 ea.
  • 72″ (6 ft.) - $20.55 ea.
  • 96″ (8 ft.) - $25.62 ea.
  • 144″ (12 ft.) - $31.89 ea.
  • 240″ (20 ft.) - $53.12 ea. -LTL freight rates apply
Best shipping value:
Single Heat Lot Required
Why are heat lots important?
Heat lots ensure consistent metal properties, full traceability, and quality control, which are critical for precision and reliability in your projects.

By selecting "Single Heat Lot Required" option, we ensure all cut pieces are sourced from a single heat lot for consistency in material characteristics.
Create Custom Cut

QTY

$4.50 ea.
$4.50 for 1

5/8" x 0.065" Carbon Steel Square Tube A500/A513 Hot Rolled - 
Part #: 10289

5/8" x 0.065" Carbon Steel Square Tube A500/A513 Hot Rolled -
Part #: 10289

Click for more details

mild-steel-square-tube-hot-rolled-a500-1superZoom

Dimensions

  • Height: 0.625"
  • Wall: 0.065"
See all available dimensions for this product
  • 12″ (1 ft.) - $4.50 ea.
  • 24″ (2 ft.) - $5.76 ea.
  • 36″ (3 ft.) - $7.86 ea.

    Buy 4 at the 12 ft price!

  • 48″ (4 ft.) - $9.81 ea.
  • 72″ (6 ft.) - $13.84 ea.
  • 96″ (8 ft.) - $17.24 ea.
  • 144″ (12 ft.) - $21.47 ea.
  • 240″ (20 ft.) - $35.78 ea. -LTL freight rates apply
Best shipping value:
Single Heat Lot Required
Why are heat lots important?
Heat lots ensure consistent metal properties, full traceability, and quality control, which are critical for precision and reliability in your projects.

By selecting "Single Heat Lot Required" option, we ensure all cut pieces are sourced from a single heat lot for consistency in material characteristics.
Create Custom Cut

QTY

$4.50 ea.
$4.50 for 1

7/8" x 0.065" Carbon Steel Square Tube A500/A513 Hot Rolled - 
Part #: 10297

7/8" x 0.065" Carbon Steel Square Tube A500/A513 Hot Rolled -
Part #: 10297

Click for more details

mild-steel-square-tube-hot-rolled-a500-1superZoom

Dimensions

  • Height: 0.875"
  • Wall: 0.065"
See all available dimensions for this product
  • 12″ (1 ft.) - $4.50 ea.
  • 24″ (2 ft.) - $7.15 ea.
  • 36″ (3 ft.) - $9.76 ea.

    Buy 4 at the 12 ft price!

  • 48″ (4 ft.) - $12.17 ea.
  • 72″ (6 ft.) - $17.16 ea.
  • 96″ (8 ft.) - $21.38 ea.
Best shipping value:
Single Heat Lot Required
Why are heat lots important?
Heat lots ensure consistent metal properties, full traceability, and quality control, which are critical for precision and reliability in your projects.

By selecting "Single Heat Lot Required" option, we ensure all cut pieces are sourced from a single heat lot for consistency in material characteristics.
Create Custom Cut

QTY

$4.50 ea.
$4.50 for 1

1" x 0.065" Carbon Steel Square Tube A500/A513 Hot Rolled - 
Part #: 10301

1" x 0.065" Carbon Steel Square Tube A500/A513 Hot Rolled -
Part #: 10301

Click for more details

mild-steel-square-tube-hot-rolled-a500-1superZoom

Dimensions

  • Height: 1"
  • Wall: 0.065"
See all available dimensions for this product
  • 12″ (1 ft.) - $4.50 ea.
  • 24″ (2 ft.) - $5.13 ea.
  • 36″ (3 ft.) - $6.98 ea.

    Buy 4 at the 12 ft price!

  • 48″ (4 ft.) - $8.69 ea.
  • 72″ (6 ft.) - $12.29 ea.
  • 96″ (8 ft.) - $15.32 ea.
  • 144″ (12 ft.) - $19.05 ea.
  • 240″ (20 ft.) - $31.76 ea. -LTL freight rates apply
  • 288″ (24 ft.) - $38.13 ea. LTL freight starting at $245 on all lengths greater than 96"
Best shipping value:
Single Heat Lot Required
Why are heat lots important?
Heat lots ensure consistent metal properties, full traceability, and quality control, which are critical for precision and reliability in your projects.

By selecting "Single Heat Lot Required" option, we ensure all cut pieces are sourced from a single heat lot for consistency in material characteristics.
Create Custom Cut

QTY

$4.50 ea.
$4.50 for 1

1" x 0.12" Carbon Steel Square Tube A500/A513 Hot Rolled - 
Part #: 10305

1" x 0.12" Carbon Steel Square Tube A500/A513 Hot Rolled -
Part #: 10305

Click for more details

mild-steel-square-tube-hot-rolled-a500-1superZoom

Dimensions

  • Height: 1"
  • Wall: 0.12"
See all available dimensions for this product
  • 12″ (1 ft.) - $5.10 ea.
  • 24″ (2 ft.) - $9.94 ea.
  • 36″ (3 ft.) - $13.56 ea.

    Buy 4 at the 12 ft price!

  • 48″ (4 ft.) - $16.90 ea.
  • 72″ (6 ft.) - $23.88 ea.
  • 96″ (8 ft.) - $29.75 ea.
  • 144″ (12 ft.) - $37.02 ea.
  • 240″ (20 ft.) - $61.69 ea. -LTL freight rates apply
  • 288″ (24 ft.) - $74.05 ea. LTL freight starting at $245 on all lengths greater than 96"
Best shipping value:
Single Heat Lot Required
Why are heat lots important?
Heat lots ensure consistent metal properties, full traceability, and quality control, which are critical for precision and reliability in your projects.

By selecting "Single Heat Lot Required" option, we ensure all cut pieces are sourced from a single heat lot for consistency in material characteristics.
Create Custom Cut

QTY

$5.10 ea.
$5.10 for 1

1 1/4" x 0.12" Carbon Steel Square Tube A500/A513 Hot Rolled - 
Part #: 10318

1 1/4" x 0.12" Carbon Steel Square Tube A500/A513 Hot Rolled -
Part #: 10318

Click for more details

mild-steel-square-tube-hot-rolled-a500-1superZoom

Dimensions

  • Height: 1.25"
  • Wall: 0.12"
See all available dimensions for this product
  • 12″ (1 ft.) - $6.68 ea.
  • 24″ (2 ft.) - $13.03 ea.
  • 36″ (3 ft.) - $17.76 ea.

    Buy 4 at the 12 ft price!

  • 48″ (4 ft.) - $22.14 ea.
  • 72″ (6 ft.) - $31.28 ea.
  • 96″ (8 ft.) - $38.95 ea.
  • 144″ (12 ft.) - $48.48 ea.
  • 240″ (20 ft.) - $80.81 ea. -LTL freight rates apply
  • 288″ (24 ft.) - $96.97 ea. LTL freight starting at $245 on all lengths greater than 96"
Best shipping value:
Single Heat Lot Required
Why are heat lots important?
Heat lots ensure consistent metal properties, full traceability, and quality control, which are critical for precision and reliability in your projects.

By selecting "Single Heat Lot Required" option, we ensure all cut pieces are sourced from a single heat lot for consistency in material characteristics.
Create Custom Cut

QTY

$6.68 ea.
$6.68 for 1

1 1/4" x 0.1875" Carbon Steel Square Tube A500/A513 Hot Rolled - 
Part #: 10320

1 1/4" x 0.1875" Carbon Steel Square Tube A500/A513 Hot Rolled -
Part #: 10320

Click for more details

mild-steel-square-tube-hot-rolled-a500-1superZoom

Dimensions

  • Height: 1.25"
  • Wall: 0.1875"
See all available dimensions for this product
  • 12″ (1 ft.) - $12.22 ea.
  • 24″ (2 ft.) - $23.77 ea.
  • 36″ (3 ft.) - $32.45 ea.

    Buy 4 at the 12 ft price!

  • 48″ (4 ft.) - $40.47 ea.
  • 72″ (6 ft.) - $57.15 ea.
  • 96″ (8 ft.) - $71.18 ea.
  • 144″ (12 ft.) - $88.61 ea.
  • 240″ (20 ft.) - $147.68 ea. -LTL freight rates apply
  • 288″ (24 ft.) - $177.22 ea. LTL freight starting at $245 on all lengths greater than 96"
Best shipping value:
Single Heat Lot Required
Why are heat lots important?
Heat lots ensure consistent metal properties, full traceability, and quality control, which are critical for precision and reliability in your projects.

By selecting "Single Heat Lot Required" option, we ensure all cut pieces are sourced from a single heat lot for consistency in material characteristics.
Create Custom Cut

QTY

$12.22 ea.
$12.22 for 1

1 1/4" x 0.065" Carbon Steel Square Tube A500/A513 Hot Rolled - 
Part #: 10314

1 1/4" x 0.065" Carbon Steel Square Tube A500/A513 Hot Rolled -
Part #: 10314

Click for more details

mild-steel-square-tube-hot-rolled-a500-1superZoom

Dimensions

  • Height: 1.25"
  • Wall: 0.065"
See all available dimensions for this product
  • 12″ (1 ft.) - $4.50 ea.
  • 24″ (2 ft.) - $6.97 ea.
  • 36″ (3 ft.) - $9.51 ea.

    Buy 4 at the 12 ft price!

  • 48″ (4 ft.) - $11.86 ea.
  • 72″ (6 ft.) - $16.74 ea.
  • 96″ (8 ft.) - $20.85 ea.
  • 144″ (12 ft.) - $25.94 ea.
  • 240″ (20 ft.) - $43.24 ea. -LTL freight rates apply
  • 288″ (24 ft.) - $51.90 ea. LTL freight starting at $245 on all lengths greater than 96"
Best shipping value:
Single Heat Lot Required
Why are heat lots important?
Heat lots ensure consistent metal properties, full traceability, and quality control, which are critical for precision and reliability in your projects.

By selecting "Single Heat Lot Required" option, we ensure all cut pieces are sourced from a single heat lot for consistency in material characteristics.
Create Custom Cut

QTY

$4.50 ea.
$4.50 for 1

1 1/2" x 0.065" Carbon Steel Square Tube A500/A513 Hot Rolled - 
Part #: 10322

1 1/2" x 0.065" Carbon Steel Square Tube A500/A513 Hot Rolled -
Part #: 10322

Click for more details

mild-steel-square-tube-hot-rolled-a500-1superZoom

Dimensions

  • Height: 1.5"
  • Wall: 0.065"
See all available dimensions for this product
  • 12″ (1 ft.) - $4.50 ea.
  • 24″ (2 ft.) - $8.67 ea.
  • 36″ (3 ft.) - $11.86 ea.

    Buy 4 at the 12 ft price!

  • 48″ (4 ft.) - $14.76 ea.
  • 72″ (6 ft.) - $20.85 ea.
  • 96″ (8 ft.) - $25.97 ea.
  • 144″ (12 ft.) - $32.32 ea.
  • 240″ (20 ft.) - $53.89 ea. -LTL freight rates apply
  • 288″ (24 ft.) - $64.67 ea. LTL freight starting at $245 on all lengths greater than 96"
Best shipping value:
Single Heat Lot Required
Why are heat lots important?
Heat lots ensure consistent metal properties, full traceability, and quality control, which are critical for precision and reliability in your projects.

By selecting "Single Heat Lot Required" option, we ensure all cut pieces are sourced from a single heat lot for consistency in material characteristics.
Create Custom Cut

QTY

$4.50 ea.
$4.50 for 1

1 1/2" x 0.12" Carbon Steel Square Tube A500/A513 Hot Rolled - 
Part #: 10326

1 1/2" x 0.12" Carbon Steel Square Tube A500/A513 Hot Rolled -
Part #: 10326

Click for more details

mild-steel-square-tube-hot-rolled-a500-1superZoom

Dimensions

  • Height: 1.5"
  • Wall: 0.12"
See all available dimensions for this product
  • 12″ (1 ft.) - $7.96 ea.
  • 24″ (2 ft.) - $15.43 ea.
  • 36″ (3 ft.) - $21.09 ea.

    Buy 4 at the 12 ft price!

  • 48″ (4 ft.) - $26.27 ea.
  • 72″ (6 ft.) - $37.11 ea.
  • 96″ (8 ft.) - $46.22 ea.
  • 240″ (20 ft.) - $95.89 ea. -LTL freight rates apply
  • 288″ (24 ft.) - $115.07 ea. LTL freight starting at $245 on all lengths greater than 96"
Best shipping value:
Single Heat Lot Required
Why are heat lots important?
Heat lots ensure consistent metal properties, full traceability, and quality control, which are critical for precision and reliability in your projects.

By selecting "Single Heat Lot Required" option, we ensure all cut pieces are sourced from a single heat lot for consistency in material characteristics.
Create Custom Cut

QTY

$7.96 ea.
$7.96 for 1

1 1/2" x 0.1875" Carbon Steel Square Tube A500/A513 Hot Rolled - 
Part #: 10328

1 1/2" x 0.1875" Carbon Steel Square Tube A500/A513 Hot Rolled -
Part #: 10328

Click for more details

mild-steel-square-tube-hot-rolled-a500-1superZoom

Dimensions

  • Height: 1.5"
  • Wall: 0.1875"
See all available dimensions for this product
  • 12″ (1 ft.) - $11.29 ea.
  • 24″ (2 ft.) - $22.01 ea.
  • 36″ (3 ft.) - $30.01 ea.

    Buy 4 at the 12 ft price!

  • 48″ (4 ft.) - $37.42 ea.
  • 72″ (6 ft.) - $52.86 ea.
  • 96″ (8 ft.) - $65.82 ea.
  • 144″ (12 ft.) - $81.95 ea.
  • 240″ (20 ft.) - $136.57 ea. -LTL freight rates apply
  • 288″ (24 ft.) - $163.88 ea. LTL freight starting at $245 on all lengths greater than 96"
Best shipping value:
Single Heat Lot Required
Why are heat lots important?
Heat lots ensure consistent metal properties, full traceability, and quality control, which are critical for precision and reliability in your projects.

By selecting "Single Heat Lot Required" option, we ensure all cut pieces are sourced from a single heat lot for consistency in material characteristics.
Create Custom Cut

QTY

$11.29 ea.
$11.29 for 1
  • 1
  • 3

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