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Carbon Steel Square Bar

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Carbon Steel Square Bar

We carry Carbon Steel Square Bar in A36, 1018, and 1045.

A36 offers good strength, high durability, heavy weight, easy weldability, and low cost. A36 steel is the most common low-carbon structural steel.

1018 steel is the most commonly available of the cold-rolled steels. It has a good combination of all of the typical traits of steel - strength, some ductility, and comparative ease of welding and machining.

1045 is a commonly used low carbon steel alloy with good strength, ductility, and ease of machining.

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

Material Properties

Carbon Steel Product Guide

Carbon Steel Square Bar

We carry Carbon Steel Square Bar in A36, 1018, and 1045.

A36 offers good strength, high durability, heavy weight, easy weldability, and low cost. A36 steel is the most common low-carbon structural steel.

1045 is a commonly used low carbon steel alloy with good strength, ductility, and ease of machining.

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

Material Properties

Carbon Steel Product Guide

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78 results

2 3/4" Carbon Steel Square Bar 1018 Cold Finish Part # 19648

Select a Size or Custom Cut

QTY

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$127.96 for 1

$127.96 ea.

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Dimensions

Height: 2.75"

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mild-steel-square-bar-1018-cold-finish-1superZoom-mob{product.code}

Material Meets These Standard(s): ASTM-A108

Key Features

CUSTOM CUT

FREE MTR Available

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3" Carbon Steel Square Bar 1018 Cold Finish Part # 13232

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QTY

Update

$153.56 for 1

$153.56 ea.

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Dimensions

Height: 3"

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Material Meets These Standard(s): ASTM-A108

Key Features

CUSTOM CUT

FREE MTR Available

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mild-steel-square-bar-1018-cold-finish-1superZoom-desk13232

3" Carbon Steel Square Bar 12L14 Part # mp-00066813

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QTY

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$185.85 for 1

$185.85 ea.

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Dimensions

Height: 3"

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cold-roll-square-bar-1018-cold-finish-1superZoom-mob{product.code}

Key Features

CUSTOM CUT DFARS Compliant

MTR AVAILABLE product return

Non-returnable

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cold-roll-square-bar-1018-cold-finish-1superZoom-deskmp-00066813

3" Carbon Steel Square Bar 12L14 Part # mp-00066813

Dimensions

Height: 3"

Select a Size or Custom Cut

+ Create Custom Cut
12″ (1 ft.) - $185.85 ea.
24″ (2 ft.) - $371.07 ea.
36″ (3 ft.) - $556.50 ea.
48″ (4 ft.) - $742.04 ea.
60″ (5 ft.) - $927.57 ea.
72″ (6 ft.) - $1,113.00 ea.

Seller's Info	Custom Cut	MTR	USA Made	Returns	DFARS	Price	Qty

3" Carbon Steel Square Bar A36 Hot Rolled Part # mp-00038706

Sold & Shipped by MSP Metals

Select a Size or Custom Cut

QTY

Update

$147.18 for 1

$147.18 ea.

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Dimensions

Height: 3"

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hot-roll-square-bar-a36-1superZoom-mob{product.code}

Key Features

CUSTOM CUT DFARS Compliant

MTR AVAILABLE product return

Non-returnable

View more product details

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hot-roll-square-bar-a36-1superZoom-deskmp-00038706

3" Carbon Steel Square Bar A36 Hot Rolled Part # mp-00038706

Dimensions

Height: 3"

Select a Size or Custom Cut

+ Create Custom Cut
12″ (1 ft.) - $147.18 ea.
24″ (2 ft.) - $294.36 ea.
36″ (3 ft.) - $441.53 ea.
48″ (4 ft.) - $588.70 ea.
60″ (5 ft.) - $735.89 ea.
72″ (6 ft.) - $883.07 ea.
96″ (8 ft.) - $1,177.42 ea.

Seller's Info	Custom Cut	MTR	USA Made	Returns	DFARS	Price	Qty

3 1/2" Carbon Steel Square Bar 1018 Cold Finish Part # 12717

Select a Size or Custom Cut

QTY

Update

$231.72 for 1

$231.72 ea.

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Dimensions

Height: 3.5"

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Material Meets These Standard(s): ASTM-A108

Key Features

CUSTOM CUT

FREE MTR Available

View more product details

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mild-steel-square-bar-1018-cold-finish-1superZoom-desk12717

3.5" Carbon Steel Square Bar A36 Hot Rolled Part # mp-00038669

Sold & Shipped by MSP Metals

Select a Size or Custom Cut

QTY

Update

$219.20 for 1

$219.20 ea.

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Dimensions

Height: 3.5"

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Key Features

CUSTOM CUT DFARS Compliant

MTR AVAILABLE product return

Non-returnable

View more product details

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hot-roll-square-bar-a36-1superZoom-deskmp-00038669

3.5" Carbon Steel Square Bar A36 Hot Rolled Part # mp-00038669

Dimensions

Height: 3.5"

Select a Size or Custom Cut

+ Create Custom Cut
12″ (1 ft.) - $219.20 ea.
24″ (2 ft.) - $438.39 ea.
36″ (3 ft.) - $657.58 ea.
48″ (4 ft.) - $876.77 ea.
60″ (5 ft.) - $1,095.97 ea.
72″ (6 ft.) - $1,315.15 ea.
96″ (8 ft.) - $1,753.53 ea.

Seller's Info	Custom Cut	MTR	USA Made	Returns	DFARS	Price	Qty

4mm Carbon Steel Square Bar 1018 Cold Finish 60" Length [+/- 2"] Part # 24503

Pack of 6

QTY

Update

$166.11

$166.11 ea.

Expand Details

Dimensions

Height: 4mm

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Material Meets These Standard(s): ASTM-A108 , ASTM-A29

Key Features

FREE MTR Available

View more product details

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mild-steel-square-bar-1018-cold-finish-1superZoom-desk24503

4" Carbon Steel Square Bar A36 Hot Rolled Part # mp-00038683

Sold & Shipped by MSP Metals

Select a Size or Custom Cut

QTY

Update

$285.86 for 1

$285.86 ea.

Expand Details

Dimensions

Height: 4"

Click for more details

Key Features

CUSTOM CUT DFARS Compliant

MTR AVAILABLE product return

Non-returnable

View more product details

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hot-roll-square-bar-a36-1superZoom-deskmp-00038683

4" Carbon Steel Square Bar A36 Hot Rolled Part # mp-00038683

Dimensions

Height: 4"

Select a Size or Custom Cut

+ Create Custom Cut
12″ (1 ft.) - $285.86 ea.
24″ (2 ft.) - $571.71 ea.
36″ (3 ft.) - $857.58 ea.
48″ (4 ft.) - $1,143.43 ea.
60″ (5 ft.) - $1,429.30 ea.
72″ (6 ft.) - $1,715.15 ea.
96″ (8 ft.) - $2,286.87 ea.

Seller's Info	Custom Cut	MTR	USA Made	Returns	DFARS	Price	Qty

4" Carbon Steel Square Bar 1018 Cold Finish Part # mp-00063116

Sold & Shipped by MSP Metals

Select a Size or Custom Cut

QTY

Update

$380.02 for 1

$380.02 ea.

Expand Details

Dimensions

Height: 4"

Click for more details

Key Features

CUSTOM CUT DFARS Compliant

MTR AVAILABLE product return

Non-returnable

View more product details

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mild-steel-square-bar-1018-cold-finish-1superZoom-deskmp-00063116

4" Carbon Steel Square Bar 1018 Cold Finish Part # mp-00063116

Dimensions

Height: 4"

Select a Size or Custom Cut

+ Create Custom Cut
12″ (1 ft.) - $380.02 ea.
24″ (2 ft.) - $760.03 ea.
36″ (3 ft.) - $1,140.05 ea.
48″ (4 ft.) - $1,520.06 ea.
60″ (5 ft.) - $1,900.08 ea.
72″ (6 ft.) - $2,280.10 ea.

Seller's Info	Custom Cut	MTR	USA Made	Returns	DFARS	Price	Qty

4 1/2" Carbon Steel Square Bar A36 Hot Rolled Part # mp-00064783

Sold & Shipped by MSP Metals

Select a Size or Custom Cut

QTY

Update

$360.91 for 1

$360.91 ea.

Expand Details

Dimensions

Height: 4.5"

Click for more details

Key Features

CUSTOM CUT DFARS Compliant

MTR AVAILABLE product return

Non-returnable

View more product details

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hot-roll-square-bar-a36-1superZoom-deskmp-00064783

4 1/2" Carbon Steel Square Bar A36 Hot Rolled Part # mp-00064783

Dimensions

Height: 4.5"

Select a Size or Custom Cut

+ Create Custom Cut
12″ (1 ft.) - $360.91 ea.
24″ (2 ft.) - $721.81 ea.
36″ (3 ft.) - $1,082.72 ea.
48″ (4 ft.) - $1,443.62 ea.
60″ (5 ft.) - $1,804.53 ea.
72″ (6 ft.) - $2,165.44 ea.
96″ (8 ft.) - $2,887.25 ea.

Seller's Info	Custom Cut	MTR	USA Made	Returns	DFARS	Price	Qty

5mm Carbon Steel Square Bar 1018 Cold Finish 60" Length [+/- 2"] Part # 24504

Pack of 10

QTY

Update

$156.91

$156.91 ea.

Expand Details

Dimensions

Height: 5mm

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Material Meets These Standard(s): ASTM-A108 , ASTM-A29

Key Features

FREE MTR Available

View more product details

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mild-steel-square-bar-1018-cold-finish-1superZoom-desk24504

5" Carbon Steel Square Bar 1018 Cold Finish Part # mp-00066965

Sold & Shipped by MSP Metals

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QTY

Update

$903.00 for 1

$903.00 ea.

Expand Details

Dimensions

Height: 5"

Click for more details

Key Features

CUSTOM CUT DFARS Compliant

MTR AVAILABLE product return

Non-returnable

View more product details

Click for more details

5" Carbon Steel Square Bar 1018 Cold Finish Part # mp-00066965

Dimensions

Height: 5"

Select a Size or Custom Cut

+ Create Custom Cut
24″ (2 ft.) - $903.00 ea.
36″ (3 ft.) - $1,354.50 ea.
48″ (4 ft.) - $1,806.00 ea.
72″ (6 ft.) - $2,614.50 ea.
144″ (12 ft.) - $5,187.00 ea.

Seller's Info	Custom Cut	MTR	USA Made	Returns	DFARS	Price	Qty

5" Carbon Steel Square Bar A36 Hot Rolled Part # mp-00038699

Sold & Shipped by MSP Metals

Select a Size or Custom Cut

QTY

Update

$533.95 for 1

$533.95 ea.

Expand Details

Dimensions

Height: 5"

Click for more details

Key Features

CUSTOM CUT DFARS Compliant

MTR AVAILABLE product return

Non-returnable

View more product details

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hot-roll-square-bar-a36-1superZoom-deskmp-00038699

5" Carbon Steel Square Bar A36 Hot Rolled Part # mp-00038699

Dimensions

Height: 5"

Select a Size or Custom Cut

+ Create Custom Cut
12″ (1 ft.) - $533.95 ea.
24″ (2 ft.) - $1,067.90 ea.
36″ (3 ft.) - $1,601.85 ea.
48″ (4 ft.) - $2,135.78 ea.
60″ (5 ft.) - $2,669.73 ea.
72″ (6 ft.) - $3,203.69 ea.
96″ (8 ft.) - $4,271.58 ea.

Seller's Info	Custom Cut	MTR	USA Made	Returns	DFARS	Price	Qty

6mm Carbon Steel Square Bar 1018 Cold Finish 60" Length [+/- 2"] Part # 24505

Pack of 6

QTY

Update

$145.19

$145.19 ea.

Expand Details

Dimensions

Height: 6mm

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Material Meets These Standard(s): ASTM-A108 , ASTM-A29

Key Features

FREE MTR Available

View more product details

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mild-steel-square-bar-1018-cold-finish-1superZoom-desk24505

6" Carbon Steel Square Bar A36 Hot Rolled Part # mp-00038682

Sold & Shipped by MSP Metals

Select a Size or Custom Cut

QTY

Update

$699.09 for 1

$699.09 ea.

Expand Details

Dimensions

Height: 6"

Click for more details

Key Features

CUSTOM CUT DFARS Compliant

MTR AVAILABLE product return

Non-returnable

View more product details

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hot-roll-square-bar-a36-1superZoom-deskmp-00038682

6" Carbon Steel Square Bar A36 Hot Rolled Part # mp-00038682

Dimensions

Height: 6"

Select a Size or Custom Cut

+ Create Custom Cut
12″ (1 ft.) - $699.09 ea.
24″ (2 ft.) - $1,398.16 ea.
36″ (3 ft.) - $2,097.25 ea.
48″ (4 ft.) - $2,796.33 ea.
60″ (5 ft.) - $3,495.42 ea.
72″ (6 ft.) - $4,194.49 ea.
96″ (8 ft.) - $5,592.66 ea.

Seller's Info	Custom Cut	MTR	USA Made	Returns	DFARS	Price	Qty

8mm Carbon Steel Square Bar 1018 Cold Finish 60" Length [+/- 2"] Part # 24506

Pack of 4

QTY

Update

$157.32

$157.32 ea.

Expand Details

Dimensions

Height: 8mm

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Material Meets These Standard(s): ASTM-A108 , ASTM-A29

Key Features

FREE MTR Available

View more product details

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mild-steel-square-bar-1018-cold-finish-1superZoom-desk24506

10mm Carbon Steel Square Bar 1018 Cold Finish 60" Length [+/- 2"] Part # 24507

Pack of 3

QTY

Update

$152.67

$152.67 ea.

Expand Details

Dimensions

Height: 10mm

Click for more details

Material Meets These Standard(s): ASTM-A108 , ASTM-A29

Key Features

FREE MTR Available

View more product details

Click for more details

mild-steel-square-bar-1018-cold-finish-1superZoom-desk24507

12mm Carbon Steel Square Bar 1018 Cold Finish 60" Length [+/- 2"] Part # 24508

Pack of 2

QTY

Update

$149.77

$149.77 ea.

Expand Details

Dimensions

Height: 12mm

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Material Meets These Standard(s): ASTM-A108 , ASTM-A29

Key Features

FREE MTR Available

View more product details

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mild-steel-square-bar-1018-cold-finish-1superZoom-desk24508

15mm Carbon Steel Square Bar 1018 Cold Finish 60" Length [+/- 2"] Part # 24509

Pack of 2

QTY

Update

$213.81

$213.81 ea.

Expand Details

Dimensions

Height: 15mm

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Material Meets These Standard(s): ASTM-A108 , ASTM-A29

Key Features

FREE MTR Available

View more product details

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mild-steel-square-bar-1018-cold-finish-1superZoom-desk24509

20mm Carbon Steel Square Bar 1018 Cold Finish 60" Length [+/- 2"] Part # 24510

Pack of 1

QTY

Update

$201.25

$201.25 ea.

Expand Details

Dimensions

Height: 20mm

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Material Meets These Standard(s): ASTM-A108 , ASTM-A29

Key Features

FREE MTR Available

View more product details

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mild-steel-square-bar-1018-cold-finish-1superZoom-desk24510

20mm Carbon Steel Square Bar 1045 72" Length [+/- 2"] Part # 27092

Pack of 1

QTY

Update

$204.14

$204.14 ea.

Expand Details

Dimensions

Height: 20mm

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Material Meets These Standard(s): ASTM-A29 , ASTM-A108

Key Features

FREE MTR Available

View more product details

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mild-steel-square-bar-1018-cold-finish-1superZoom-desk27092

20mm Carbon Steel Square Bar 1045 36" Length [+/- 2"] Part # 27091

Pack of 1

QTY

Update

$146.28

$146.28 ea.

Expand Details

Dimensions

Height: 20mm

Click for more details

Material Meets These Standard(s): ASTM-A29 , ASTM-A108

Key Features

FREE MTR Available

View more product details

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mild-steel-square-bar-1018-cold-finish-1superZoom-desk27091

20mm Carbon Steel Square Bar 1045 12" Length [+/- 2"] Part # 27090

Pack of 3

QTY

Update

$146.28

$146.28 ea.

Expand Details

Dimensions

Height: 20mm

Click for more details

Material Meets These Standard(s): ASTM-A29 , ASTM-A108

Key Features

FREE MTR Available

View more product details

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mild-steel-square-bar-1018-cold-finish-1superZoom-desk27090

25mm Carbon Steel Square Bar 1018 Cold Finish 60" Length [+/- 2"] Part # 24511

Pack of 1

QTY

Update

$286.52

$286.52 ea.

Expand Details

Dimensions

Height: 25mm

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Material Meets These Standard(s): ASTM-A108 , ASTM-A29

Key Features

FREE MTR Available

View more product details

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mild-steel-square-bar-1018-cold-finish-1superZoom-desk24511

25mm Carbon Steel Square Bar 1045 36" Length [+/- 2"] Part # 27094

Pack of 1

QTY

Update

$228.58

$228.58 ea.

Expand Details

Dimensions

Height: 25mm

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Material Meets These Standard(s): ASTM-A29 , ASTM-A108

Key Features

FREE MTR Available

View more product details

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