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Alloy Steel Round Bar 4140

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14-08-2025 - alloy steel bar-round 4140 - 1000x1000superZoom-main

Alloy Steel Round Bar 4140

Alloy Steel Round Bar 4140 is normally used for heavy-duty industrial applications. Also referred to as Chromoly steel, 4140 is known for strength, resistance to fracturing, abrasion, and impact in high stress applications.

Material Properties

Alloy Steel 4140 Product Guide |

Alloy Steel 4140 Round Bar Tolerances

Alloy Steel Round Bar 4140

Material Properties

Alloy Steel 4140 Product Guide |

Alloy Steel 4140 Round Bar Tolerances

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89 results

1 7/8" Alloy Steel Round Bar 4140 Cold Finish Heat Treated Part # mp-00002452

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$79.09 for 1

$79.09 ea.

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Dimensions

Diameter: 1.875"

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Material Meets These Standard(s): ASTM-B 193 B7

Key Features

CUSTOM CUT DFARS Compliant

MTR AVAILABLE product return

Non-returnable

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1 7/8" Alloy Steel Round Bar 4140 Cold Finish Heat Treated Part # mp-00002452

Dimensions

Diameter: 1.875"

Material Meets These Standard(s): ASTM-B 193 B7

Select a Size or Custom Cut

+ Create Custom Cut
12″ (1 ft.) - $79.09 ea.
24″ (2 ft.) - $158.15 ea.
36″ (3 ft.) - $237.24 ea.
48″ (4 ft.) - $316.32 ea.
72″ (6 ft.) - $474.47 ea.
96″ (8 ft.) - $632.65 ea.

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

2" Alloy Steel Round Bar 4140-Annealed Cold Finish Part # 10587

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$77.37 for 1

$77.37 ea.

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Dimensions

Diameter: 2"

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Material Meets These Standard(s): ASTM-A108

Key Features

CUSTOM CUT

FREE MTR Available

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2" Alloy Steel Round Bar 4140 Hot Rolled Heat Treated Part # mp-00002391

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$83.65 for 1

$83.65 ea.

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Dimensions

Diameter: 2"

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Material Meets These Standard(s): ASTM-B 193 B7

Key Features

CUSTOM CUT DFARS Compliant

MTR AVAILABLE product return

Non-returnable

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alloy-steel-round-bar-4140-annealed-cold-finish-1superZoom-deskmp-00002391

2" Alloy Steel Round Bar 4140 Hot Rolled Heat Treated Part # mp-00002391

Dimensions

Diameter: 2"

Material Meets These Standard(s): ASTM-B 193 B7

Select a Size or Custom Cut

+ Create Custom Cut
12″ (1 ft.) - $83.65 ea.
24″ (2 ft.) - $167.34 ea.
36″ (3 ft.) - $250.99 ea.
48″ (4 ft.) - $334.66 ea.
72″ (6 ft.) - $501.97 ea.
96″ (8 ft.) - $669.30 ea.

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

2" Alloy Steel Round Bar 4140 Cold Finish Heat Treated Part # mp-00002444

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$89.97 for 1

$89.97 ea.

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Dimensions

Diameter: 2"

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Material Meets These Standard(s): ASTM-B 193 B7

Key Features

CUSTOM CUT DFARS Compliant

MTR AVAILABLE product return

Non-returnable

View more product details

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alloy-steel-round-bar-4140-annealed-cold-finish-1superZoom-deskmp-00002444

2" Alloy Steel Round Bar 4140 Cold Finish Heat Treated Part # mp-00002444

Dimensions

Diameter: 2"

Material Meets These Standard(s): ASTM-B 193 B7

Select a Size or Custom Cut

+ Create Custom Cut
12″ (1 ft.) - $89.97 ea.
24″ (2 ft.) - $179.95 ea.
36″ (3 ft.) - $269.92 ea.
48″ (4 ft.) - $359.90 ea.
72″ (6 ft.) - $539.85 ea.
96″ (8 ft.) - $719.80 ea.

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

2 1/8" Alloy Steel Round Bar 4140 Cold Finish Heat Treated Part # mp-00002471

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$101.59 for 1

$101.59 ea.

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Dimensions

Diameter: 2.125"

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Material Meets These Standard(s): ASTM-B 193 B7

Key Features

CUSTOM CUT DFARS Compliant

MTR AVAILABLE product return

Non-returnable

View more product details

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alloy-steel-round-bar-4140-annealed-cold-finish-1superZoom-deskmp-00002471

2 1/8" Alloy Steel Round Bar 4140 Cold Finish Heat Treated Part # mp-00002471

Dimensions

Diameter: 2.125"

Material Meets These Standard(s): ASTM-B 193 B7

Select a Size or Custom Cut

+ Create Custom Cut
12″ (1 ft.) - $101.59 ea.
24″ (2 ft.) - $203.15 ea.
36″ (3 ft.) - $304.73 ea.
48″ (4 ft.) - $406.30 ea.
72″ (6 ft.) - $609.44 ea.
96″ (8 ft.) - $812.60 ea.

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

2 1/4" Alloy Steel Round Bar 4140-Annealed Cold Finish Part # 15475

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$82.94 for 1

$82.94 ea.

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Dimensions

Diameter: 2.25"

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Material Meets These Standard(s): ASTM-A108

Key Features

CUSTOM CUT

FREE MTR Available

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alloy-steel-round-bar-4140-annealed-cold-finish-1superZoom-desk15475

2 1/4" Alloy Steel Round Bar 4140 Cold Finish Heat Treated Part # mp-00002425

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$113.86 for 1

$113.86 ea.

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Dimensions

Diameter: 2.25"

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Material Meets These Standard(s): ASTM-B 193 B7

Key Features

CUSTOM CUT DFARS Compliant

MTR AVAILABLE product return

Non-returnable

View more product details

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2 1/4" Alloy Steel Round Bar 4140 Cold Finish Heat Treated Part # mp-00002425

Dimensions

Diameter: 2.25"

Material Meets These Standard(s): ASTM-B 193 B7

Select a Size or Custom Cut

+ Create Custom Cut
12″ (1 ft.) - $113.86 ea.
24″ (2 ft.) - $227.77 ea.
36″ (3 ft.) - $341.64 ea.
48″ (4 ft.) - $455.50 ea.
72″ (6 ft.) - $683.26 ea.
96″ (8 ft.) - $911.01 ea.

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

2 1/4" Alloy Steel Round Bar 4140 Hot Rolled Heat Treated Part # mp-00002486

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$105.90 for 1

$105.90 ea.

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Dimensions

Diameter: 2.25"

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Material Meets These Standard(s): ASTM-B 193 B7

Key Features

CUSTOM CUT DFARS Compliant

MTR AVAILABLE product return

Non-returnable

View more product details

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2 1/4" Alloy Steel Round Bar 4140 Hot Rolled Heat Treated Part # mp-00002486

Dimensions

Diameter: 2.25"

Material Meets These Standard(s): ASTM-B 193 B7

Select a Size or Custom Cut

+ Create Custom Cut
12″ (1 ft.) - $105.90 ea.
24″ (2 ft.) - $211.76 ea.
36″ (3 ft.) - $317.66 ea.
48″ (4 ft.) - $423.54 ea.
72″ (6 ft.) - $635.30 ea.
96″ (8 ft.) - $847.08 ea.

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

2 3/8" Alloy Steel Round Bar 4140 Hot Rolled Heat Treated Part # mp-00002441

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$117.98 for 1

$117.98 ea.

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Dimensions

Diameter: 2.375"

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Material Meets These Standard(s): ASTM-B 193 B7

Key Features

CUSTOM CUT DFARS Compliant

MTR AVAILABLE product return

Non-returnable

View more product details

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2 3/8" Alloy Steel Round Bar 4140 Hot Rolled Heat Treated Part # mp-00002441

Dimensions

Diameter: 2.375"

Material Meets These Standard(s): ASTM-B 193 B7

Select a Size or Custom Cut

+ Create Custom Cut
12″ (1 ft.) - $117.98 ea.
24″ (2 ft.) - $235.96 ea.
36″ (3 ft.) - $353.93 ea.
48″ (4 ft.) - $471.91 ea.
72″ (6 ft.) - $707.85 ea.
96″ (8 ft.) - $943.80 ea.

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

2 3/8" Alloy Steel Round Bar 4140 Cold Finish Heat Treated Part # mp-00002488

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$126.88 for 1

$126.88 ea.

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Dimensions

Diameter: 2.375"

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Material Meets These Standard(s): ASTM-B 193 B7

Key Features

CUSTOM CUT DFARS Compliant

MTR AVAILABLE product return

Non-returnable

View more product details

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alloy-steel-round-bar-4140-annealed-cold-finish-1superZoom-deskmp-00002488

2 3/8" Alloy Steel Round Bar 4140 Cold Finish Heat Treated Part # mp-00002488

Dimensions

Diameter: 2.375"

Material Meets These Standard(s): ASTM-B 193 B7

Select a Size or Custom Cut

+ Create Custom Cut
12″ (1 ft.) - $126.88 ea.
24″ (2 ft.) - $253.77 ea.
36″ (3 ft.) - $380.64 ea.
48″ (4 ft.) - $507.52 ea.
72″ (6 ft.) - $761.27 ea.
96″ (8 ft.) - $1,015.05 ea.

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

2 1/2" Alloy Steel Round Bar 4140-Annealed Cold Finish Part # 20920

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QTY

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$111.98 for 1

$111.98 ea.

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Dimensions

Diameter: 2.5"

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Key Features

CUSTOM CUT

FREE MTR Available

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alloy-steel-round-bar-4140-annealed-cold-finish-1superZoom-desk20920

2 1/2" Alloy Steel Round Bar 4140 Cold Finish Heat Treated Part # mp-00002430

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$140.57 for 1

$140.57 ea.

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Dimensions

Diameter: 2.5"

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Material Meets These Standard(s): ASTM-B 193 B7

Key Features

CUSTOM CUT DFARS Compliant

MTR AVAILABLE product return

Non-returnable

View more product details

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alloy-steel-round-bar-4140-annealed-cold-finish-1superZoom-deskmp-00002430

2 1/2" Alloy Steel Round Bar 4140 Cold Finish Heat Treated Part # mp-00002430

Dimensions

Diameter: 2.5"

Material Meets These Standard(s): ASTM-B 193 B7

Select a Size or Custom Cut

+ Create Custom Cut
12″ (1 ft.) - $140.57 ea.
24″ (2 ft.) - $281.18 ea.
36″ (3 ft.) - $421.76 ea.
48″ (4 ft.) - $562.36 ea.
72″ (6 ft.) - $843.53 ea.
96″ (8 ft.) - $1,124.70 ea.

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

2 1/2" Alloy Steel Round Bar 4140 Hot Rolled Heat Treated Part # mp-00002468

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$134.18 for 1

$134.18 ea.

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Dimensions

Diameter: 2.5"

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Material Meets These Standard(s): ASTM-B 193 B7

Key Features

CUSTOM CUT DFARS Compliant

MTR AVAILABLE product return

Non-returnable

View more product details

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2 1/2" Alloy Steel Round Bar 4140 Hot Rolled Heat Treated Part # mp-00002468

Dimensions

Diameter: 2.5"

Material Meets These Standard(s): ASTM-B 193 B7

Select a Size or Custom Cut

+ Create Custom Cut
12″ (1 ft.) - $134.18 ea.
24″ (2 ft.) - $268.38 ea.
36″ (3 ft.) - $402.56 ea.
48″ (4 ft.) - $536.74 ea.
72″ (6 ft.) - $805.13 ea.
96″ (8 ft.) - $1,073.52 ea.

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

2 5/8" Alloy Steel Round Bar 4140 Cold Finish Heat Treated Part # mp-00002483

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$155.00 for 1

$155.00 ea.

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Dimensions

Diameter: 2.625"

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Material Meets These Standard(s): ASTM-B 193 B7

Key Features

CUSTOM CUT DFARS Compliant

MTR AVAILABLE product return

Non-returnable

View more product details

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2 5/8" Alloy Steel Round Bar 4140 Cold Finish Heat Treated Part # mp-00002483

Dimensions

Diameter: 2.625"

Material Meets These Standard(s): ASTM-B 193 B7

Select a Size or Custom Cut

+ Create Custom Cut
12″ (1 ft.) - $155.00 ea.
24″ (2 ft.) - $309.99 ea.
36″ (3 ft.) - $464.99 ea.
48″ (4 ft.) - $619.99 ea.
72″ (6 ft.) - $930.00 ea.
96″ (8 ft.) - $1,239.99 ea.

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

2 3/4" Alloy Steel Round Bar 4140-Annealed Cold Finish Part # 15492

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QTY

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$128.56 for 1

$128.56 ea.

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Dimensions

Diameter: 2.75"

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Material Meets These Standard(s): ASTM-A108

Key Features

CUSTOM CUT

FREE MTR Available

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alloy-steel-round-bar-4140-annealed-cold-finish-1superZoom-desk15492

2 3/4" Alloy Steel Round Bar 4140-Annealed Hot Rolled Part # 26220

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$137.95 for 1

$137.95 ea.

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Dimensions

Diameter: 2.75"

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Key Features

CUSTOM CUT

FREE MTR Available

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2 3/4" Alloy Steel Round Bar 4140 Cold Finish Heat Treated Part # mp-00002413

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$174.57 for 1

$174.57 ea.

Expand Details

Dimensions

Diameter: 2.75"

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Material Meets These Standard(s): ASTM-B 193 B7

Key Features

CUSTOM CUT DFARS Compliant

MTR AVAILABLE product return

Non-returnable

View more product details

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2 3/4" Alloy Steel Round Bar 4140 Cold Finish Heat Treated Part # mp-00002413

Dimensions

Diameter: 2.75"

Material Meets These Standard(s): ASTM-B 193 B7

Select a Size or Custom Cut

+ Create Custom Cut
12″ (1 ft.) - $174.57 ea.
24″ (2 ft.) - $349.11 ea.
36″ (3 ft.) - $523.69 ea.
48″ (4 ft.) - $698.22 ea.
72″ (6 ft.) - $1,047.38 ea.
96″ (8 ft.) - $1,396.49 ea.

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

2 3/4" Alloy Steel Round Bar 4140 Hot Rolled Heat Treated Part # mp-00002470

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QTY

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$158.16 for 1

$158.16 ea.

Expand Details

Dimensions

Diameter: 2.75"

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Material Meets These Standard(s): ASTM-B 193 B7

Key Features

CUSTOM CUT DFARS Compliant

MTR AVAILABLE product return

Non-returnable

View more product details

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2 3/4" Alloy Steel Round Bar 4140 Hot Rolled Heat Treated Part # mp-00002470

Dimensions

Diameter: 2.75"

Material Meets These Standard(s): ASTM-B 193 B7

Select a Size or Custom Cut

+ Create Custom Cut
12″ (1 ft.) - $158.16 ea.
24″ (2 ft.) - $316.34 ea.
36″ (3 ft.) - $474.51 ea.
48″ (4 ft.) - $632.69 ea.
72″ (6 ft.) - $949.04 ea.
96″ (8 ft.) - $1,265.40 ea.

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

3" Alloy Steel Round Bar 4140 Hot Rolled Heat Treated Part # mp-00002398

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$188.25 for 1

$188.25 ea.

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Dimensions

Diameter: 3"

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Material Meets These Standard(s): ASTM-B 193 B7

Key Features

CUSTOM CUT DFARS Compliant

MTR AVAILABLE product return

Non-returnable

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3" Alloy Steel Round Bar 4140 Hot Rolled Heat Treated Part # mp-00002398

Dimensions

Diameter: 3"

Material Meets These Standard(s): ASTM-B 193 B7

Select a Size or Custom Cut

+ Create Custom Cut
12″ (1 ft.) - $188.25 ea.
24″ (2 ft.) - $376.49 ea.
36″ (3 ft.) - $564.71 ea.
48″ (4 ft.) - $752.96 ea.
72″ (6 ft.) - $1,129.43 ea.
96″ (8 ft.) - $1,505.92 ea.

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

3" Alloy Steel Round Bar 4140 Cold Finish Heat Treated Part # mp-00002487

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$202.45 for 1

$202.45 ea.

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Dimensions

Diameter: 3"

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Material Meets These Standard(s): ASTM-B 193 B7

Key Features

CUSTOM CUT DFARS Compliant

MTR AVAILABLE product return

Non-returnable

View more product details

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3" Alloy Steel Round Bar 4140 Cold Finish Heat Treated Part # mp-00002487

Dimensions

Diameter: 3"

Material Meets These Standard(s): ASTM-B 193 B7

Select a Size or Custom Cut

+ Create Custom Cut
12″ (1 ft.) - $202.45 ea.
24″ (2 ft.) - $404.89 ea.
36″ (3 ft.) - $607.34 ea.
48″ (4 ft.) - $809.78 ea.
72″ (6 ft.) - $1,214.68 ea.
96″ (8 ft.) - $1,619.57 ea.

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

3 1/4" Alloy Steel Round Bar 4140 Hot Rolled Heat Treated Part # mp-00002402

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$220.92 for 1

$220.92 ea.

Expand Details

Dimensions

Diameter: 3.25"

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Material Meets These Standard(s): ASTM-B 193 B7

Key Features

CUSTOM CUT DFARS Compliant

MTR AVAILABLE product return

Non-returnable

View more product details

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3 1/4" Alloy Steel Round Bar 4140 Hot Rolled Heat Treated Part # mp-00002402

Dimensions

Diameter: 3.25"

Material Meets These Standard(s): ASTM-B 193 B7

Select a Size or Custom Cut

+ Create Custom Cut
12″ (1 ft.) - $220.92 ea.
24″ (2 ft.) - $441.84 ea.
72″ (6 ft.) - $1,325.53 ea.

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

3 3/8" Alloy Steel Round Bar 4140 Hot Rolled Heat Treated Part # mp-00002421

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$238.53 for 1

$238.53 ea.

Expand Details

Dimensions

Diameter: 3.375"

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Material Meets These Standard(s): ASTM-B 193 B7

Key Features

CUSTOM CUT DFARS Compliant

MTR AVAILABLE product return

Non-returnable

View more product details

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3 3/8" Alloy Steel Round Bar 4140 Hot Rolled Heat Treated Part # mp-00002421

Dimensions

Diameter: 3.375"

Material Meets These Standard(s): ASTM-B 193 B7

Select a Size or Custom Cut

+ Create Custom Cut
12″ (1 ft.) - $238.53 ea.
24″ (2 ft.) - $477.07 ea.
72″ (6 ft.) - $1,431.18 ea.

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

3 1/2" Alloy Steel Round Bar 4140 Hot Rolled Heat Treated Part # mp-00002399

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$258.88 for 1

$258.88 ea.

Expand Details

Dimensions

Diameter: 3.5"

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Material Meets These Standard(s): ASTM-B 193 B7

Key Features

CUSTOM CUT DFARS Compliant

MTR AVAILABLE product return

Non-returnable

View more product details

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alloy-steel-round-bar-4140-annealed-cold-finish-1superZoom-deskmp-00002399

3 1/2" Alloy Steel Round Bar 4140 Hot Rolled Heat Treated Part # mp-00002399

Dimensions

Diameter: 3.5"

Material Meets These Standard(s): ASTM-B 193 B7

Select a Size or Custom Cut

+ Create Custom Cut
12″ (1 ft.) - $258.88 ea.
24″ (2 ft.) - $517.78 ea.
72″ (6 ft.) - $1,553.32 ea.

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

3 1/2" Alloy Steel Round Bar 4140 Cold Finish Heat Treated Part # mp-00002467

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$275.55 for 1

$275.55 ea.

Expand Details

Dimensions

Diameter: 3.5"

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Material Meets These Standard(s): ASTM-B 193 B7

Key Features

CUSTOM CUT DFARS Compliant

MTR AVAILABLE product return

Non-returnable

View more product details

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alloy-steel-round-bar-4140-annealed-cold-finish-1superZoom-deskmp-00002467

3 1/2" Alloy Steel Round Bar 4140 Cold Finish Heat Treated Part # mp-00002467

Dimensions

Diameter: 3.5"

Material Meets These Standard(s): ASTM-B 193 B7

Select a Size or Custom Cut

+ Create Custom Cut
12″ (1 ft.) - $275.55 ea.
24″ (2 ft.) - $551.11 ea.
72″ (6 ft.) - $1,653.31 ea.

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

3 5/8" Alloy Steel Round Bar 4140 Hot Rolled Heat Treated Part # mp-00002484

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$274.84 for 1

$274.84 ea.

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Dimensions

Diameter: 3.625"

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Material Meets These Standard(s): ASTM-B 193 B7

Key Features

CUSTOM CUT DFARS Compliant

MTR AVAILABLE product return

Non-returnable

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alloy-steel-round-bar-4140-annealed-cold-finish-1superZoom-deskmp-00002484

3 5/8" Alloy Steel Round Bar 4140 Hot Rolled Heat Treated Part # mp-00002484

Dimensions

Diameter: 3.625"

Material Meets These Standard(s): ASTM-B 193 B7

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12″ (1 ft.) - $274.84 ea.
24″ (2 ft.) - $549.69 ea.
72″ (6 ft.) - $1,649.07 ea.

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

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Alloy Steel Round Bar 4140

Alloy Steel Round Bar 4140

Material Properties

Alloy Steel Round Bar 4140

Material Properties

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