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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

7/8" Alloy Steel Round Bar 4140 Cold Finish Heat Treated Part # mp-00002395

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$20.33 for 1

$20.33 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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7/8" Alloy Steel Round Bar 4140 Cold Finish Heat Treated Part # mp-00002395

Dimensions

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

Select a Size or Custom Cut

+ Create Custom Cut
12″ (1 ft.) - $20.33 ea.
24″ (2 ft.) - $40.64 ea.
36″ (3 ft.) - $60.97 ea.
48″ (4 ft.) - $81.27 ea.
72″ (6 ft.) - $121.92 ea.
96″ (8 ft.) - $162.55 ea.

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

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

Dimensions

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

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+ 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

3/4" Alloy Steel Round Bar 4140 Cold Finish Heat Treated Part # mp-00002397

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$17.70 for 1

$17.70 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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3/4" Alloy Steel Round Bar 4140 Cold Finish Heat Treated Part # mp-00002397

Dimensions

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

Select a Size or Custom Cut

+ Create Custom Cut
12″ (1 ft.) - $17.70 ea.
24″ (2 ft.) - $35.41 ea.
36″ (3 ft.) - $53.12 ea.
48″ (4 ft.) - $70.81 ea.
72″ (6 ft.) - $106.23 ea.
96″ (8 ft.) - $141.62 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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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

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 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.

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

Dimensions

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

4" Alloy Steel Round Bar 4140 Hot Rolled Heat Treated Part # mp-00002400

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$334.66 for 1

$334.66 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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4" Alloy Steel Round Bar 4140 Hot Rolled Heat Treated Part # mp-00002400

Dimensions

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

Select a Size or Custom Cut

+ Create Custom Cut
12″ (1 ft.) - $334.66 ea.
24″ (2 ft.) - $669.30 ea.
72″ (6 ft.) - $2,007.88 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.

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

Dimensions

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

1 1/2" Alloy Steel Round Bar 4140 Cold Finish Heat Treated Part # mp-00002404

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$50.60 for 1

$50.60 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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1 1/2" Alloy Steel Round Bar 4140 Cold Finish Heat Treated Part # mp-00002404

Dimensions

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

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12″ (1 ft.) - $50.60 ea.
24″ (2 ft.) - $101.23 ea.
36″ (3 ft.) - $151.83 ea.
48″ (4 ft.) - $202.45 ea.
72″ (6 ft.) - $303.67 ea.
96″ (8 ft.) - $404.89 ea.
144″ (12 ft.) - $607.34 ea.

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

1" Alloy Steel Round Bar 4140 Cold Finish Heat Treated Part # mp-00002410

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$22.50 for 1

$22.50 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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1" Alloy Steel Round Bar 4140 Cold Finish Heat Treated Part # mp-00002410

Dimensions

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

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12″ (1 ft.) - $22.50 ea.
24″ (2 ft.) - $44.98 ea.
36″ (3 ft.) - $67.48 ea.
48″ (4 ft.) - $89.97 ea.
72″ (6 ft.) - $134.97 ea.
96″ (8 ft.) - $179.95 ea.

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

1 5/8" Alloy Steel Round Bar 4140 Cold Finish Heat Treated Part # mp-00002412

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$59.39 for 1

$59.39 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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alloy-steel-round-bar-4140-annealed-cold-finish-1superZoom-deskmp-00002412

1 5/8" Alloy Steel Round Bar 4140 Cold Finish Heat Treated Part # mp-00002412

Dimensions

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

Select a Size or Custom Cut

+ Create Custom Cut
12″ (1 ft.) - $59.39 ea.
24″ (2 ft.) - $118.80 ea.
36″ (3 ft.) - $178.20 ea.
48″ (4 ft.) - $237.58 ea.
72″ (6 ft.) - $356.38 ea.
96″ (8 ft.) - $475.20 ea.

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

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.

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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-00002413

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

Dimensions

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

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.

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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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alloy-steel-round-bar-4140-annealed-cold-finish-1superZoom-deskmp-00002421

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

Dimensions

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

6" Alloy Steel Round Bar 4140 Hot Rolled Heat Treated Part # mp-00002422

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$802.67 for 1

$802.67 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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alloy-steel-round-bar-4140-annealed-cold-finish-1superZoom-deskmp-00002422

6" Alloy Steel Round Bar 4140 Hot Rolled Heat Treated Part # mp-00002422

Dimensions

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

Select a Size or Custom Cut

+ Create Custom Cut
12″ (1 ft.) - $802.67 ea.
24″ (2 ft.) - $1,605.37 ea.
72″ (6 ft.) - $4,816.10 ea.

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

5" Alloy Steel Round Bar 4140 Hot Rolled Heat Treated Part # mp-00002424

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$557.42 for 1

$557.42 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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alloy-steel-round-bar-4140-annealed-cold-finish-1superZoom-deskmp-00002424

5" Alloy Steel Round Bar 4140 Hot Rolled Heat Treated Part # mp-00002424

Dimensions

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

Select a Size or Custom Cut

+ Create Custom Cut
12″ (1 ft.) - $557.42 ea.
24″ (2 ft.) - $1,114.83 ea.
72″ (6 ft.) - $3,344.49 ea.

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

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

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CUSTOM CUT DFARS Compliant

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

Dimensions

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

1 1/4" Alloy Steel Round Bar 4140 Cold Finish Heat Treated Part # mp-00002426

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$35.14 for 1

$35.14 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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1 1/4" Alloy Steel Round Bar 4140 Cold Finish Heat Treated Part # mp-00002426

Dimensions

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

Select a Size or Custom Cut

+ Create Custom Cut
12″ (1 ft.) - $35.14 ea.
24″ (2 ft.) - $70.30 ea.
36″ (3 ft.) - $105.44 ea.
48″ (4 ft.) - $140.57 ea.
72″ (6 ft.) - $210.88 ea.
96″ (8 ft.) - $281.18 ea.
144″ (12 ft.) - $421.76 ea.

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

7" Alloy Steel Round Bar 4140 Hot Rolled Heat Treated Part # mp-00002428

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$1,092.54 for 1

$1,092.54 ea.

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

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CUSTOM CUT

U.S.A. Made DFARS Compliant

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7" Alloy Steel Round Bar 4140 Hot Rolled Heat Treated Part # mp-00002428

Dimensions

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

Select a Size or Custom Cut

+ Create Custom Cut
12″ (1 ft.) - $1,092.54 ea.
24″ (2 ft.) - $2,185.06 ea.
72″ (6 ft.) - $6,555.23 ea.

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

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

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CUSTOM CUT DFARS Compliant

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

Dimensions

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

1/2" Alloy Steel Round Bar 4140 Cold Finish Heat Treated Part # mp-00002423

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$11.99 for 1

$11.99 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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1/2" Alloy Steel Round Bar 4140 Cold Finish Heat Treated Part # mp-00002423

Dimensions

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

Select a Size or Custom Cut

+ Create Custom Cut
12″ (1 ft.) - $11.99 ea.
24″ (2 ft.) - $23.97 ea.
36″ (3 ft.) - $35.95 ea.
48″ (4 ft.) - $47.94 ea.
72″ (6 ft.) - $71.91 ea.
96″ (8 ft.) - $95.91 ea.

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

4 3/4" Alloy Steel Round Bar 4140 Hot Rolled Heat Treated Part # mp-00002427

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$503.07 for 1

$503.07 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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4 3/4" Alloy Steel Round Bar 4140 Hot Rolled Heat Treated Part # mp-00002427

Dimensions

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

Select a Size or Custom Cut

+ Create Custom Cut
12″ (1 ft.) - $503.07 ea.
24″ (2 ft.) - $1,006.14 ea.
72″ (6 ft.) - $3,018.41 ea.

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

1 1/8" Alloy Steel Round Bar 4140 Cold Finish Heat Treated Part # mp-00002439

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$28.47 for 1

$28.47 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-00002439

1 1/8" Alloy Steel Round Bar 4140 Cold Finish Heat Treated Part # mp-00002439

Dimensions

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

Select a Size or Custom Cut

+ Create Custom Cut
12″ (1 ft.) - $28.47 ea.
24″ (2 ft.) - $56.94 ea.
36″ (3 ft.) - $85.40 ea.
48″ (4 ft.) - $113.86 ea.
72″ (6 ft.) - $170.82 ea.
96″ (8 ft.) - $227.77 ea.

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

3 3/4" Alloy Steel Round Bar 4140 Hot Rolled Heat Treated Part # mp-00002440

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$294.13 for 1

$294.13 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-00002440

3 3/4" Alloy Steel Round Bar 4140 Hot Rolled Heat Treated Part # mp-00002440

Dimensions

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

Select a Size or Custom Cut

+ Create Custom Cut
12″ (1 ft.) - $294.13 ea.
24″ (2 ft.) - $588.25 ea.
72″ (6 ft.) - $1,764.74 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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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-00002441

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

Dimensions

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" 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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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-00002444

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

Dimensions

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

8" Alloy Steel Round Bar 4140 Hot Rolled Heat Treated Part # mp-00002446

Sold & Shipped by MSP Metals

Select a Size or Custom Cut

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$1,427.00 for 1

$1,427.00 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

Click for more details

alloy-steel-round-bar-4140-annealed-cold-finish-1superZoom-deskmp-00002446

8" Alloy Steel Round Bar 4140 Hot Rolled Heat Treated Part # mp-00002446

Dimensions

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

Select a Size or Custom Cut

+ Create Custom Cut
12″ (1 ft.) - $1,427.00 ea.
24″ (2 ft.) - $2,853.97 ea.
72″ (6 ft.) - $8,561.93 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

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Alloy Steel Round Bar 4140

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