New Lower Shipping Rates! Get the industry's best ground prices and save more—especially on longer lengths.  

Shop all Products
Explore OLM Rewards

Open for Orders 24/7!

Deals
Get a Quick Quote!

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

alt text here

Sort by

Relevance
  • Relevance
  • Size
  • Price:Low to High
  • Product Name: A to Z
  • Product Name: Z to A
  • Price:High to Low

Close

Refine Your Results

Clear Search

Filters

Production Method

Surface

Grade

Domestic

DFARS

seller

Material

Alloy/Type

Shape

Online Metals #1 in Freight Shipping!

2.25" X 0.109" Wall Carbon Steel Perforated Telescopic Square Tube - 
Part #: mp-00002174

2.25" X 0.109" Wall Carbon Steel Perforated Telescopic Square Tube -
Part #: mp-00002174

Click for more details

Dimensions

  • Height: 2.25"
  • Opening Size: 0.4375"
  • Wall: 0.109"
  • Ships In: 1-2 Business Days
See all available dimensions for this product
  • 12″ (1 ft.) - $28.22 ea.
  • 24″ (2 ft.) - $42.32 ea.
  • 36″ (3 ft.) - $56.43 ea.
  • 48″ (4 ft.) - $70.53 ea.
  • 60″ (5 ft.) - $84.64 ea.
  • 72″ (6 ft.) - $98.75 ea.
  • 84″ (7 ft.) - $112.85 ea.
  • 96″ (8 ft.) - $126.96 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.

QTY

$28.22 ea.
$28.22 for 1
Sold and shipped by All Metals Inc

2.5" X 0.238" Wall Carbon Steel Square Tube A500 Flash Removed For Trailer Hitch - 
Part #: mp-00002175

2.5" X 0.238" Wall Carbon Steel Square Tube A500 Flash Removed For Trailer Hitch -
Part #: mp-00002175

Click for more details

Dimensions

  • Height: 2.5"
  • Wall: 0.238"
  • Ships In: 1-2 Business Days
See all available dimensions for this product
  • 6″ (6 in.) - $24.76 ea.
  • 12″ (1 ft.) - $33.84 ea.
  • 18″ (18 in.) - $42.92 ea.
  • 24″ (2 ft.) - $51.99 ea.
  • 30″ (30 in.) - $61.06 ea.
  • 36″ (3 ft.) - $70.17 ea.
  • 42″ (42 in.) - $79.25 ea.
  • 48″ (4 ft.) - $88.32 ea.
  • 54″ (54 in.) - $97.42 ea.
  • 60″ (5 ft.) - $106.49 ea.
  • 66″ (66 in.) - $126.36 ea.
  • 72″ (6 ft.) - $135.45 ea.
  • 78″ (78 in.) - $144.52 ea.
  • 84″ (7 ft.) - $153.59 ea.
  • 90″ (90 in.) - $162.67 ea.
  • 96″ (8 ft.) - $171.78 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.

QTY

$24.76 ea.
$24.76 for 1
Sold and shipped by All Metals Inc

2" X 0.109" Wall Carbon Steel Perforated Telescopic Square Tube - 
Part #: mp-00002176

2" X 0.109" Wall Carbon Steel Perforated Telescopic Square Tube -
Part #: mp-00002176

Click for more details

Dimensions

  • Height: 2"
  • Opening Size: 0.4375"
  • Wall: 0.109"
  • Ships In: 1-2 Business Days
See all available dimensions for this product
  • 12″ (1 ft.) - $26.05 ea.
  • 24″ (2 ft.) - $39.07 ea.
  • 36″ (3 ft.) - $52.09 ea.
  • 48″ (4 ft.) - $65.11 ea.
  • 60″ (5 ft.) - $78.13 ea.
  • 72″ (6 ft.) - $91.15 ea.
  • 84″ (7 ft.) - $104.17 ea.
  • 96″ (8 ft.) - $117.19 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.

QTY

$26.05 ea.
$26.05 for 1
Sold and shipped by All Metals Inc

1.75" X 0.109" Wall Carbon Steel Perforated Telescopic Square Tube - 
Part #: mp-00002173

1.75" X 0.109" Wall Carbon Steel Perforated Telescopic Square Tube -
Part #: mp-00002173

Click for more details

Dimensions

  • Height: 1.75"
  • Opening Size: 0.4375"
  • Wall: 0.109"
  • Ships In: 1-2 Business Days
See all available dimensions for this product
  • 12″ (1 ft.) - $23.88 ea.
  • 24″ (2 ft.) - $37.44 ea.
  • 36″ (3 ft.) - $51.00 ea.
  • 48″ (4 ft.) - $64.57 ea.
  • 60″ (5 ft.) - $78.13 ea.
  • 72″ (6 ft.) - $91.69 ea.
  • 84″ (7 ft.) - $105.26 ea.
  • 96″ (8 ft.) - $118.82 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.

QTY

$23.88 ea.
$23.88 for 1
Sold and shipped by All Metals Inc

1 3/4" x 0.12" Carbon Steel Square Tube A500/A513 Hot Rolled - 
Part #: 10335

1 3/4" x 0.12" Carbon Steel Square Tube A500/A513 Hot Rolled -
Part #: 10335

Click for more details

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

Dimensions

  • Height: 1.75"
  • Wall: 0.12"
See all available dimensions for this product
  • 12″ (1 ft.) - $10.36 ea.
  • 24″ (2 ft.) - $20.12 ea.
  • 36″ (3 ft.) - $27.49 ea.

    Buy 4 at the 12 ft price!

  • 48″ (4 ft.) - $34.25 ea.
  • 72″ (6 ft.) - $48.38 ea.
  • 96″ (8 ft.) - $60.28 ea.
  • 144″ (12 ft.) - $75.03 ea.
  • 240″ (20 ft.) - $125.05 ea. -LTL freight rates apply
  • 288″ (24 ft.) - $150.05 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

$10.36 ea.
$10.36 for 1

5/8" x 5/8" x 16ga Carbon Steel Square Tube ASTM A653 Pre-Galvanized - 
Part #: mp-00005374

5/8" x 5/8" x 16ga Carbon Steel Square Tube ASTM A653 Pre-Galvanized -
Part #: mp-00005374

Click for more details

Dimensions

  • Height: 0.625"
  • Wall: 0.065"
  • Gauge: 16"
  • Ships In: 1-2 Business Days
See all available dimensions for this product
  • 12″ (1 ft.) - $3.33 ea.
  • 24″ (2 ft.) - $4.65 ea.
  • 36″ (3 ft.) - $5.98 ea.
  • 48″ (4 ft.) - $7.30 ea.
  • 60″ (5 ft.) - $8.62 ea.
  • 72″ (6 ft.) - $9.95 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.

QTY

$3.33 ea.
$3.33 for 1
Sold and shipped by Competitive Metals

3/4" x 3/4" x 16ga Carbon Steel Square Tube ASTM A653 Pre-Galvanized - 
Part #: mp-00005373

3/4" x 3/4" x 16ga Carbon Steel Square Tube ASTM A653 Pre-Galvanized -
Part #: mp-00005373

Click for more details

Dimensions

  • Height: 0.75"
  • Wall: 0.065"
  • Gauge: 16"
  • Ships In: 1-2 Business Days
See all available dimensions for this product
  • 12″ (1 ft.) - $3.59 ea.
  • 24″ (2 ft.) - $5.17 ea.
  • 36″ (3 ft.) - $6.76 ea.
  • 48″ (4 ft.) - $8.34 ea.
  • 60″ (5 ft.) - $9.93 ea.
  • 72″ (6 ft.) - $11.51 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.

QTY

$3.59 ea.
$3.59 for 1
Sold and shipped by Competitive Metals

60mm x 4mm Carbon Steel Square Tube 1018 - 
Part #: 28433

60mm x 4mm Carbon Steel Square Tube 1018-
Part #: 28433

Click for more details

Dimensions

  • Height: 60mm
  • Wall: 4mm
See all available dimensions for this product
Pricing and availability for this item changes frequently. Contact us now for a fast quote.

15mm x 2mm Carbon Steel Square Tube 1018 Metric 48" Length [+/- 2"] - 
Part #: 28455

15mm x 2mm Carbon Steel Square Tube 1018 Metric 48" Length [+/- 2"]-
Part #: 28455

Click for more details

Dimensions

  • Height: 15mm
  • Wall: 2mm
See all available dimensions for this product
Pricing and availability for this item changes frequently. Contact us now for a fast quote.

40mm x 4mm Carbon Steel Square Tube 1018 Metric 240" Length - 
Part #: 28898

40mm x 4mm Carbon Steel Square Tube 1018 Metric 240" Length-
Part #: 28898

Click for more details

Placeholder for future product image

Dimensions

  • Height: 40mm
  • Wall: 4mm
See all available dimensions for this product
Pricing and availability for this item changes frequently. Contact us now for a fast quote.

40mm x 2mm Carbon Steel Square Tube 1018 Metric - 
Part #: 28981

40mm x 2mm Carbon Steel Square Tube 1018 Metric-
Part #: 28981

Click for more details

Placeholder for future product image

Dimensions

  • Height: 40mm
  • Wall: 2mm
See all available dimensions for this product
Pricing and availability for this item changes frequently. Contact us now for a fast quote.

40mm x 2mm Carbon Steel Square Tube 1018 Metric 240" Length - 
Part #: 28979

40mm x 2mm Carbon Steel Square Tube 1018 Metric 240" Length-
Part #: 28979

Click for more details

Placeholder for future product image

Dimensions

  • Height: 40mm
  • Wall: 2mm
See all available dimensions for this product
Pricing and availability for this item changes frequently. Contact us now for a fast quote.

4" x 0.375" Carbon Steel Square Tube A500 Hot Rolled - 
Part #: 29026

4" x 0.375" Carbon Steel Square Tube A500 Hot Rolled-
Part #: 29026

Click for more details

Placeholder for future product image

Dimensions

  • Height: 4"
  • Wall: 0.375"
See all available dimensions for this product
Pricing and availability for this item changes frequently. Contact us now for a fast quote.
  • 1
  • 2
  • 3

Can't find what you're looking for?

Contact us for a custom quote