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4140

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4140 Product Guide Product   | 4140 Alloy Steel Tolerance Guide product

Alloy Steel 4140 has high strength, high fatigue strength, toughness, torsional strength, and impact and abrasion resistance. Additionally, 4140 steel is highly ductile when annealed, though it requires more pressure as it is tougher than most carbon steels. 4140 is easily welded, but if this is done after hardening, it will also require a post weld heat treatment. This material is typically used in aerospace, oil, gas, automotive, agricultural, and defense industries, specifically gears, shafts, spindles, fixtures, and collars.

 

We offer 4140 in round tube, metric round tube, hex bar, metric hex bar, cold finish hex bar, rectangle bar, round bar, metric round bar, sheet plate, annealed sheet plate, and precision blanks.

 

Relevant Knowledge Hub Resources: 5 Reasons to Cut-to-Size | The Weldability of Steel

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1" X 12" Alloy Steel Rectangle Bar 4140 Heat Treated - 
Part #: mp-00002639

1" X 12" Alloy Steel Rectangle Bar 4140 Heat Treated -
Part #: mp-00002639

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Sold & shipped by MSP Metals

Dimensions

  • Thickness: 1"
  • Width: 12"
See all available dimensions for this product
  • 12″ (1 ft.) - $295.59 ea.
  • 24″ (2 ft.) - $591.18 ea.
  • 36″ (3 ft.) - $886.76 ea.
  • 48″ (4 ft.) - $1,182.35 ea.
  • 60″ (5 ft.) - $1,477.94 ea.
  • 72″ (6 ft.) - $1,773.53 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.
Create Custom Cut

QTY

$295.59 ea.
$295.59 for 1

1" X 8" Alloy Steel Rectangle Bar 4140 Heat Treated - 
Part #: mp-00002646

1" X 8" Alloy Steel Rectangle Bar 4140 Heat Treated -
Part #: mp-00002646

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Sold & shipped by MSP Metals

Dimensions

  • Thickness: 1"
  • Width: 8"
See all available dimensions for this product
  • 12″ (1 ft.) - $196.83 ea.
  • 24″ (2 ft.) - $393.65 ea.
  • 36″ (3 ft.) - $590.48 ea.
  • 48″ (4 ft.) - $787.31 ea.
  • 60″ (5 ft.) - $984.13 ea.
  • 72″ (6 ft.) - $1,180.96 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.
Create Custom Cut

QTY

$196.83 ea.
$196.83 for 1

1" X 1.5" Alloy Steel Rectangle Bar 4140 Heat Treated - 
Part #: mp-00002657

1" X 1.5" Alloy Steel Rectangle Bar 4140 Heat Treated -
Part #: mp-00002657

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Sold & shipped by MSP Metals

Dimensions

  • Thickness: 1"
  • Width: 1.5"
See all available dimensions for this product
  • 12″ (1 ft.) - $36.86 ea.
  • 24″ (2 ft.) - $73.72 ea.
  • 36″ (3 ft.) - $110.58 ea.
  • 48″ (4 ft.) - $147.45 ea.
  • 60″ (5 ft.) - $184.31 ea.
  • 72″ (6 ft.) - $221.17 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.
Create Custom Cut

QTY

$36.86 ea.
$36.86 for 1

1" X 1" Alloy Steel Rectangle Bar 4140 Heat Treated - 
Part #: mp-00002652

1" X 1" Alloy Steel Rectangle Bar 4140 Heat Treated -
Part #: mp-00002652

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Sold & shipped by MSP Metals

Dimensions

  • Thickness: 1"
  • Width: 1"
See all available dimensions for this product
  • 12″ (1 ft.) - $24.34 ea.
  • 24″ (2 ft.) - $48.69 ea.
  • 36″ (3 ft.) - $73.03 ea.
  • 48″ (4 ft.) - $97.37 ea.
  • 60″ (5 ft.) - $121.71 ea.
  • 72″ (6 ft.) - $146.06 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.
Create Custom Cut

QTY

$24.34 ea.
$24.34 for 1

1" Alloy Steel Plate 4140-Annealed - 
Part #: 27510

1" Alloy Steel Plate 4140-Annealed-
Part #: 27510

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alloy-steel-sheet-4130-annealed-1superZoom

Dimensions

  • Thickness: 1"
  • Ships In: 6-8 Buisness Days
See all available dimensions for this product
Pricing and availability for this item changes frequently. Contact us now for a fast quote.

1.000" Alloy Steel 4140 Precision Ground/Milled Blanks - 
Part #: mp-00000219

1.000" Alloy Steel 4140 Precision Ground/Milled Blanks -
Part #: mp-00000219

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Sold & shipped by TCI Precision Metals

Dimensions

  • Thickness: 1"
  • Ships In: 2 Business Days
  • Tolerance: All Dimensions +/- .002˝
See all available dimensions for this product
  • 2.0″ X 11.75″ (2.0 X 11.75 in.) - $70.39 ea.
  • 4.0″ X 11.75″ (4.0 X 11.75 in.) - $113.02 ea.
  • 6.0″ X 5.75″ (6.0 X 5.75 in.) - $181.22 ea.
  • 6.0″ X 11.75″ (6.0 X 11.75 in.) - $337.13 ea.
  • 12.0″ X 11.75″ (12.0 X 11.75 in.) - $628.69 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.
Create Custom Cut

QTY

$70.39 ea.
$70.39 for 1
quantity discountBuy More & Save up to 10% !
Qty
Price ea.
Savings
2-4
$68.28
2%
5-9
$66.87
5%
10+
$63.35
10%
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1" x 1 1/2" Alloy Steel Rectangle Bar 4140-Annealed Cold Drawn - 
Part #: 28901

1" x 1 1/2" Alloy Steel Rectangle Bar 4140-Annealed Cold Drawn -
Part #: 28901

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Dimensions

  • Thickness: 1"
  • Width: 1.5"
See all available dimensions for this product
  • 12″ (1 ft.) - $122.97 ea.
  • 24″ (2 ft.) - $239.25 ea.
  • 36″ (3 ft.) - $326.55 ea.
  • 48″ (4 ft.) - $407.16 ea.
  • 72″ (6 ft.) - $575.08 ea.
  • 144″ (12 ft.) - $891.60 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.
Create Custom Cut

QTY

$122.97 ea.
$122.97 for 1

1 1/8" Alloy Steel Plate 4140-Annealed - 
Part #: 27605

1 1/8" Alloy Steel Plate 4140-Annealed-
Part #: 27605

Click for more details

alloy-steel-sheet-4130-annealed-1superZoom

Dimensions

  • Thickness: 1.125"
  • Ships In: 6-8 Buisness Days
See all available dimensions for this product
Pricing and availability for this item changes frequently. Contact us now for a fast quote.

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

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

Click for more details

Sold & shipped by MSP Metals

Dimensions

  • Diameter: 1.125"
  • Ships In: 1 Business Day
See all available dimensions for this product
  • 12″ (1 ft.) - $21.19 ea.
  • 24″ (2 ft.) - $42.37 ea.
  • 36″ (3 ft.) - $63.56 ea.
  • 48″ (4 ft.) - $84.74 ea.
  • 72″ (6 ft.) - $127.13 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.
Create Custom Cut

QTY

$21.19 ea.
$21.19 for 1

1 1/4" Alloy Steel Hex Bar 4140/4142-Cold Finish - 
Part #: 20243

1 1/4" Alloy Steel Hex Bar 4140/4142-Cold Finish -
Part #: 20243

Click for more details

alloy-steel-hex-bar-4140-4142-cold-finish-1superZoom

Dimensions

  • Across Flats: 1.25"
See all available dimensions for this product
  • 12″ (1 ft.) - $55.85 ea.
  • 24″ (2 ft.) - $108.63 ea.
  • 36″ (3 ft.) - $148.28 ea.
  • 48″ (4 ft.) - $184.90 ea.
  • 72″ (6 ft.) - $261.14 ea.
  • 96″ (8 ft.) - $325.27 ea.
  • 144″ (12 ft.) - $404.87 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.
Create Custom Cut

QTY

$55.85 ea.
$55.85 for 1

1 1/4" Alloy Steel Round Bar 4140-Annealed Cold Finish - 
Part #: 19800

1 1/4" Alloy Steel Round Bar 4140-Annealed Cold Finish -
Part #: 19800

Click for more details

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

Dimensions

  • Diameter: 1.25"
See all available dimensions for this product
  • 12″ (1 ft.) - $34.81 ea.
  • 24″ (2 ft.) - $67.74 ea.
  • 36″ (3 ft.) - $92.45 ea.
  • 48″ (4 ft.) - $115.28 ea.
  • 72″ (6 ft.) - $162.86 ea.
  • 96″ (8 ft.) - $202.83 ea.
  • 144″ (12 ft.) - $252.47 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.
Create Custom Cut

QTY

$34.81 ea.
$34.81 for 1

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

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

Click for more details

Sold & shipped by MSP Metals

Dimensions

  • Diameter: 1.25"
  • Ships In: 1 Business Day
See all available dimensions for this product
  • 12″ (1 ft.) - $26.16 ea.
  • 24″ (2 ft.) - $52.31 ea.
  • 36″ (3 ft.) - $78.47 ea.
  • 48″ (4 ft.) - $104.62 ea.
  • 72″ (6 ft.) - $156.94 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.
Create Custom Cut

QTY

$26.16 ea.
$26.16 for 1

1.25" X 6" Alloy Steel Rectangle Bar 4140 Heat Treated - 
Part #: mp-00002550

1.25" X 6" Alloy Steel Rectangle Bar 4140 Heat Treated -
Part #: mp-00002550

Click for more details

Sold & shipped by MSP Metals

Dimensions

  • Thickness: 1.25"
  • Width: 6"
See all available dimensions for this product
  • 12″ (1 ft.) - $185.00 ea.
  • 24″ (2 ft.) - $370.01 ea.
  • 36″ (3 ft.) - $555.01 ea.
  • 48″ (4 ft.) - $740.01 ea.
  • 60″ (5 ft.) - $925.02 ea.
  • 72″ (6 ft.) - $1,110.02 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.
Create Custom Cut

QTY

$185.00 ea.
$185.00 for 1

1.25" X 4" Alloy Steel Rectangle Bar 4140 Heat Treated - 
Part #: mp-00002553

1.25" X 4" Alloy Steel Rectangle Bar 4140 Heat Treated -
Part #: mp-00002553

Click for more details

Sold & shipped by MSP Metals

Dimensions

  • Thickness: 1.25"
  • Width: 4"
See all available dimensions for this product
  • 12″ (1 ft.) - $123.10 ea.
  • 24″ (2 ft.) - $246.21 ea.
  • 36″ (3 ft.) - $369.31 ea.
  • 48″ (4 ft.) - $492.41 ea.
  • 60″ (5 ft.) - $615.52 ea.
  • 72″ (6 ft.) - $738.62 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.
Create Custom Cut

QTY

$123.10 ea.
$123.10 for 1

1.25" X 2" Alloy Steel Rectangle Bar 4140 Heat Treated - 
Part #: mp-00002593

1.25" X 2" Alloy Steel Rectangle Bar 4140 Heat Treated -
Part #: mp-00002593

Click for more details

Sold & shipped by MSP Metals

Dimensions

  • Thickness: 1.25"
  • Width: 2"
See all available dimensions for this product
  • 12″ (1 ft.) - $61.90 ea.
  • 24″ (2 ft.) - $123.80 ea.
  • 36″ (3 ft.) - $185.70 ea.
  • 48″ (4 ft.) - $247.60 ea.
  • 60″ (5 ft.) - $309.50 ea.
  • 72″ (6 ft.) - $371.40 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.
Create Custom Cut

QTY

$61.90 ea.
$61.90 for 1

1.25" X 3" Alloy Steel Rectangle Bar 4140 Heat Treated - 
Part #: mp-00002619

1.25" X 3" Alloy Steel Rectangle Bar 4140 Heat Treated -
Part #: mp-00002619

Click for more details

Sold & shipped by MSP Metals

Dimensions

  • Thickness: 1.25"
  • Width: 3"
See all available dimensions for this product
  • 12″ (1 ft.) - $92.50 ea.
  • 24″ (2 ft.) - $185.00 ea.
  • 36″ (3 ft.) - $277.50 ea.
  • 48″ (4 ft.) - $370.01 ea.
  • 60″ (5 ft.) - $462.51 ea.
  • 72″ (6 ft.) - $555.01 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.
Create Custom Cut

QTY

$92.50 ea.
$92.50 for 1

1.25" X 8" Alloy Steel Rectangle Bar 4140 Heat Treated - 
Part #: mp-00002623

1.25" X 8" Alloy Steel Rectangle Bar 4140 Heat Treated -
Part #: mp-00002623

Click for more details

Sold & shipped by MSP Metals

Dimensions

  • Thickness: 1.25"
  • Width: 8"
See all available dimensions for this product
  • 12″ (1 ft.) - $246.21 ea.
  • 24″ (2 ft.) - $492.41 ea.
  • 36″ (3 ft.) - $738.62 ea.
  • 48″ (4 ft.) - $984.83 ea.
  • 60″ (5 ft.) - $1,231.04 ea.
  • 72″ (6 ft.) - $1,477.24 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.
Create Custom Cut

QTY

$246.21 ea.
$246.21 for 1

1.25" X 12" Alloy Steel Rectangle Bar 4140 Heat Treated - 
Part #: mp-00002670

1.25" X 12" Alloy Steel Rectangle Bar 4140 Heat Treated -
Part #: mp-00002670

Click for more details

Sold & shipped by MSP Metals

Dimensions

  • Thickness: 1.25"
  • Width: 12"
See all available dimensions for this product
  • 12″ (1 ft.) - $369.31 ea.
  • 24″ (2 ft.) - $738.62 ea.
  • 36″ (3 ft.) - $1,107.93 ea.
  • 48″ (4 ft.) - $1,477.24 ea.
  • 60″ (5 ft.) - $1,846.55 ea.
  • 72″ (6 ft.) - $2,215.86 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.
Create Custom Cut

QTY

$369.31 ea.
$369.31 for 1

1 1/4" Alloy Steel Plate 4140-Annealed - 
Part #: 27511

1 1/4" Alloy Steel Plate 4140-Annealed-
Part #: 27511

Click for more details

alloy-steel-sheet-4130-annealed-1superZoom

Dimensions

  • Thickness: 1.25"
  • Ships In: 6-8 Buisness Days
See all available dimensions for this product
Pricing and availability for this item changes frequently. Contact us now for a fast quote.

1 1/4" x 1 1/2" Alloy Steel Rectangle Bar 4140 - 
Part #: 28769

1 1/4" x 1 1/2" Alloy Steel Rectangle Bar 4140-
Part #: 28769

Click for more details

mild-steel-key-stock-rectangle-1superZoom

Dimensions

  • Thickness: 1.25"
  • Width: 1.5"
See all available dimensions for this product
Pricing and availability for this item changes frequently. Contact us now for a fast quote.

1 1/4" Alloy Steel Plate 4140-Pre Hard - 
Part #: 29128

1 1/4" Alloy Steel Plate 4140-Pre Hard-
Part #: 29128

Click for more details

Placeholder for future product image

Dimensions

  • Thickness: 1.25"
  • Ships In: 6-8 Buisness Days
See all available dimensions for this product
Pricing and availability for this item changes frequently. Contact us now for a fast quote.

1 3/8" Alloy Steel Hex Bar 4140/4142-Cold Finish - 
Part #: 27980

1 3/8" Alloy Steel Hex Bar 4140/4142-Cold Finish-
Part #: 27980

Click for more details

Dimensions

  • Across Flats: 1.375"
See all available dimensions for this product
Pricing and availability for this item changes frequently. Contact us now for a fast quote.

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

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

Click for more details

Sold & shipped by MSP Metals

Dimensions

  • Diameter: 1.375"
  • Ships In: 1 Business Day
See all available dimensions for this product
  • 12″ (1 ft.) - $31.65 ea.
  • 24″ (2 ft.) - $63.30 ea.
  • 36″ (3 ft.) - $94.95 ea.
  • 48″ (4 ft.) - $126.60 ea.
  • 72″ (6 ft.) - $189.89 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.
Create Custom Cut

QTY

$31.65 ea.
$31.65 for 1

1 1/2" Alloy Steel Hex Bar 4140/4142-Cold Finish - 
Part #: 20244

1 1/2" Alloy Steel Hex Bar 4140/4142-Cold Finish -
Part #: 20244

Click for more details

alloy-steel-hex-bar-4140-4142-cold-finish-1superZoom

Dimensions

  • Across Flats: 1.5"
See all available dimensions for this product
  • 12″ (1 ft.) - $63.75 ea.
  • 24″ (2 ft.) - $124.00 ea.
  • 36″ (3 ft.) - $169.27 ea.
  • 48″ (4 ft.) - $211.03 ea.
  • 72″ (6 ft.) - $298.09 ea.
  • 96″ (8 ft.) - $371.26 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.
Create Custom Cut

QTY

$63.75 ea.
$63.75 for 1

1 1/2" Alloy Steel Round Bar 4140-Annealed Cold Finish - 
Part #: 15490

1 1/2" Alloy Steel Round Bar 4140-Annealed Cold Finish -
Part #: 15490

Click for more details

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

Dimensions

  • Diameter: 1.5"
See all available dimensions for this product
  • 12″ (1 ft.) - $48.85 ea.
  • 24″ (2 ft.) - $95.08 ea.
  • 36″ (3 ft.) - $129.76 ea.
  • 48″ (4 ft.) - $161.81 ea.
  • 72″ (6 ft.) - $228.55 ea.
  • 96″ (8 ft.) - $284.65 ea.
  • 144″ (12 ft.) - $354.34 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.
Create Custom Cut

QTY

$48.85 ea.
$48.85 for 1

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