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

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CUSTOM CUT DFARS Compliant

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Non-returnable

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

Dimensions

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

Select a Size or Custom Cut

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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

5/8" Alloy Steel Round Bar 4140 Cold Finish Heat Treated Part # mp-00002456

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$18.43 for 1

$18.43 ea.

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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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5/8" Alloy Steel Round Bar 4140 Cold Finish Heat Treated Part # mp-00002456

Dimensions

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

Select a Size or Custom Cut

+ Create Custom Cut
12″ (1 ft.) - $18.43 ea.
24″ (2 ft.) - $36.82 ea.
36″ (3 ft.) - $55.26 ea.
48″ (4 ft.) - $73.69 ea.
72″ (6 ft.) - $110.52 ea.
96″ (8 ft.) - $147.38 ea.

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

5 1/2" Alloy Steel Round Bar 4140 Hot Rolled Heat Treated Part # mp-00002448

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$674.47 for 1

$674.47 ea.

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

Key Features

CUSTOM CUT DFARS Compliant

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Non-returnable

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5 1/2" Alloy Steel Round Bar 4140 Hot Rolled Heat Treated Part # mp-00002448

Dimensions

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

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+ Create Custom Cut
12″ (1 ft.) - $674.47 ea.
24″ (2 ft.) - $1,348.97 ea.
72″ (6 ft.) - $4,046.86 ea.

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

4 1/2" Alloy Steel Round Bar 4140 Hot Rolled Heat Treated Part # mp-00002457

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$451.50 for 1

$451.50 ea.

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

Key Features

CUSTOM CUT DFARS Compliant

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Non-returnable

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4 1/2" Alloy Steel Round Bar 4140 Hot Rolled Heat Treated Part # mp-00002457

Dimensions

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

Select a Size or Custom Cut

+ Create Custom Cut
12″ (1 ft.) - $451.50 ea.
24″ (2 ft.) - $903.00 ea.
72″ (6 ft.) - $2,709.05 ea.

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

4 1/4" Alloy Steel Round Bar 4140 Hot Rolled Heat Treated Part # mp-00002459

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$402.74 for 1

$402.74 ea.

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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-00002459

4 1/4" Alloy Steel Round Bar 4140 Hot Rolled Heat Treated Part # mp-00002459

Dimensions

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

Select a Size or Custom Cut

+ Create Custom Cut
12″ (1 ft.) - $402.74 ea.
24″ (2 ft.) - $805.48 ea.
72″ (6 ft.) - $2,416.42 ea.

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

1 3/8" Alloy Steel Round Bar 4140 Cold Finish Heat Treated Part # mp-00002460

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$42.54 for 1

$42.54 ea.

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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 3/8" Alloy Steel Round Bar 4140 Cold Finish Heat Treated Part # mp-00002460

Dimensions

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

Select a Size or Custom Cut

+ Create Custom Cut
12″ (1 ft.) - $42.54 ea.
24″ (2 ft.) - $85.06 ea.
36″ (3 ft.) - $127.59 ea.
48″ (4 ft.) - $170.11 ea.
72″ (6 ft.) - $255.15 ea.
96″ (8 ft.) - $340.22 ea.

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

6 1/2" Alloy Steel Round Bar 4140 Hot Rolled Heat Treated Part # mp-00002461

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$942.03 for 1

$942.03 ea.

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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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6 1/2" Alloy Steel Round Bar 4140 Hot Rolled Heat Treated Part # mp-00002461

Dimensions

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

Select a Size or Custom Cut

+ Create Custom Cut
12″ (1 ft.) - $942.03 ea.
24″ (2 ft.) - $1,884.08 ea.
72″ (6 ft.) - $5,652.22 ea.

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

1 3/4" Alloy Steel Round Bar 4140 Cold Finish Heat Treated Part # mp-00002465

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$68.88 for 1

$68.88 ea.

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

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CUSTOM CUT DFARS Compliant

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Non-returnable

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1 3/4" Alloy Steel Round Bar 4140 Cold Finish Heat Treated Part # mp-00002465

Dimensions

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

Select a Size or Custom Cut

+ Create Custom Cut
12″ (1 ft.) - $68.88 ea.
24″ (2 ft.) - $137.78 ea.
36″ (3 ft.) - $206.66 ea.
48″ (4 ft.) - $275.55 ea.
72″ (6 ft.) - $413.32 ea.
96″ (8 ft.) - $551.11 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.

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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-00002467

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

Dimensions

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

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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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-00002468

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

Dimensions

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 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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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-00002471

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

Dimensions

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

1 3/4" Alloy Steel Round Bar 4140 Hot Rolled Heat Treated Part # mp-00002475

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$64.05 for 1

$64.05 ea.

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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-00002475

1 3/4" Alloy Steel Round Bar 4140 Hot Rolled Heat Treated Part # mp-00002475

Dimensions

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

Select a Size or Custom Cut

+ Create Custom Cut
12″ (1 ft.) - $64.05 ea.
24″ (2 ft.) - $128.11 ea.
36″ (3 ft.) - $192.16 ea.
48″ (4 ft.) - $256.20 ea.
72″ (6 ft.) - $384.33 ea.
96″ (8 ft.) - $512.43 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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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-00002483

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

Dimensions

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

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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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

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

Select a Size or Custom Cut

+ Create Custom Cut
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

3/8" Alloy Steel Round Bar 4140 Cold Finish Heat Treated Part # mp-00002485

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$7.01 for 1

$7.01 ea.

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

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CUSTOM CUT DFARS Compliant

MTR AVAILABLE product return

Non-returnable

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3/8" Alloy Steel Round Bar 4140 Cold Finish Heat Treated Part # mp-00002485

Dimensions

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

Select a Size or Custom Cut

+ Create Custom Cut
12″ (1 ft.) - $7.01 ea.
24″ (2 ft.) - $14.01 ea.
36″ (3 ft.) - $21.03 ea.
48″ (4 ft.) - $28.06 ea.
72″ (6 ft.) - $42.07 ea.
96″ (8 ft.) - $56.08 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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Material Meets These Standard(s): ASTM-B 193 B7

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CUSTOM CUT DFARS Compliant

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Non-returnable

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alloy-steel-round-bar-4140-annealed-cold-finish-1superZoom-deskmp-00002486

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

Dimensions

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 Cold Finish Heat Treated Part # mp-00002488

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$126.88 for 1

$126.88 ea.

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

Dimensions

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

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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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 Cold Finish Heat Treated Part # mp-00002487

Dimensions

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

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

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$158.16 for 1

$158.16 ea.

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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-00002470

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

Dimensions

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

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Material Properties

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