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Alloy Steel Rectangle Bar 4140 Heat Treat

-69 Products

4140 is a chromium-molybdenum alloy steel renowned for its high strength, toughness, and wear resistance after heat treatment. The rectangular bar shape of this low-alloy steel makes it ideal for machining components with flat surfaces and perpendicular edges, such as gears, shafts, and fixtures across industries like aerospace, automotive, and oil & gas. Its superior mechanical properties, including high tensile strength, fatigue strength, and impact resistance, make it a popular choice for critical applications requiring durability and reliability.
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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

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Dimensions

  • Thickness: 1.25"
  • Width: 6"
  • Ships In: 1 Business Day
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
Sold and shipped by MSP Metals

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

Dimensions

  • Thickness: 1.25"
  • Width: 4"
  • Ships In: 1 Business Day
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
Sold and shipped by MSP Metals

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

Dimensions

  • Thickness: 1.25"
  • Width: 2"
  • Ships In: 1 Business Day
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
Sold and shipped by MSP Metals

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

Dimensions

  • Thickness: 1.25"
  • Width: 3"
  • Ships In: 1 Business Day
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
Sold and shipped by MSP Metals

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

Dimensions

  • Thickness: 1.25"
  • Width: 8"
  • Ships In: 1 Business Day
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
Sold and shipped by MSP Metals

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

Dimensions

  • Thickness: 1.25"
  • Width: 12"
  • Ships In: 1 Business Day
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
Sold and shipped by MSP Metals

1.5" X 3" Alloy Steel Rectangle Bar 4140 Heat Treated - 
Part #: mp-00002531

1.5" X 3" Alloy Steel Rectangle Bar 4140 Heat Treated -
Part #: mp-00002531

Click for more details

Dimensions

  • Thickness: 1.5"
  • Width: 3"
  • Ships In: 1 Business Day
See all available dimensions for this product
  • 12″ (1 ft.) - $110.58 ea.
  • 24″ (2 ft.) - $221.17 ea.
  • 36″ (3 ft.) - $331.75 ea.
  • 48″ (4 ft.) - $442.34 ea.
  • 60″ (5 ft.) - $552.92 ea.
  • 72″ (6 ft.) - $663.51 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

$110.58 ea.
$110.58 for 1
Sold and shipped by MSP Metals

1.5" X 2" Alloy Steel Rectangle Bar 4140 Heat Treated - 
Part #: mp-00002578

1.5" X 2" Alloy Steel Rectangle Bar 4140 Heat Treated -
Part #: mp-00002578

Click for more details

Dimensions

  • Thickness: 1.5"
  • Width: 2"
  • Ships In: 1 Business Day
See all available dimensions for this product
  • 12″ (1 ft.) - $73.72 ea.
  • 24″ (2 ft.) - $147.45 ea.
  • 36″ (3 ft.) - $221.17 ea.
  • 48″ (4 ft.) - $294.89 ea.
  • 60″ (5 ft.) - $368.62 ea.
  • 72″ (6 ft.) - $442.34 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

$73.72 ea.
$73.72 for 1
Sold and shipped by MSP Metals

1.5" X 12" Alloy Steel Rectangle Bar 4140 Heat Treated - 
Part #: mp-00002586

1.5" X 12" Alloy Steel Rectangle Bar 4140 Heat Treated -
Part #: mp-00002586

Click for more details

Dimensions

  • Thickness: 1.5"
  • Width: 12"
  • Ships In: 1 Business Day
See all available dimensions for this product
  • 12″ (1 ft.) - $443.03 ea.
  • 24″ (2 ft.) - $886.07 ea.
  • 36″ (3 ft.) - $1,329.10 ea.
  • 48″ (4 ft.) - $1,772.13 ea.
  • 60″ (5 ft.) - $2,215.17 ea.
  • 72″ (6 ft.) - $2,658.20 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

$443.03 ea.
$443.03 for 1
Sold and shipped by MSP Metals

1.5" X 1.5" Alloy Steel Rectangle Bar 4140 Heat Treated - 
Part #: mp-00002602

1.5" X 1.5" Alloy Steel Rectangle Bar 4140 Heat Treated -
Part #: mp-00002602

Click for more details

Dimensions

  • Thickness: 1.5"
  • Width: 1.5"
  • Ships In: 1 Business Day
See all available dimensions for this product
  • 12″ (1 ft.) - $55.64 ea.
  • 24″ (2 ft.) - $111.28 ea.
  • 36″ (3 ft.) - $166.92 ea.
  • 48″ (4 ft.) - $222.56 ea.
  • 60″ (5 ft.) - $278.20 ea.
  • 72″ (6 ft.) - $333.84 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

$55.64 ea.
$55.64 for 1
Sold and shipped by MSP Metals

1.5" X 4" Alloy Steel Rectangle Bar 4140 Heat Treated - 
Part #: mp-00002605

1.5" X 4" Alloy Steel Rectangle Bar 4140 Heat Treated -
Part #: mp-00002605

Click for more details

Dimensions

  • Thickness: 1.5"
  • Width: 4"
  • Ships In: 1 Business Day
See all available dimensions for this product
  • 12″ (1 ft.) - $147.45 ea.
  • 24″ (2 ft.) - $294.89 ea.
  • 36″ (3 ft.) - $442.34 ea.
  • 48″ (4 ft.) - $589.78 ea.
  • 60″ (5 ft.) - $737.23 ea.
  • 72″ (6 ft.) - $884.68 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

$147.45 ea.
$147.45 for 1
Sold and shipped by MSP Metals

1.5" X 8" Alloy Steel Rectangle Bar 4140 Heat Treated - 
Part #: mp-00002607

1.5" X 8" Alloy Steel Rectangle Bar 4140 Heat Treated -
Part #: mp-00002607

Click for more details

Dimensions

  • Thickness: 1.5"
  • Width: 8"
  • Ships In: 1 Business Day
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
Sold and shipped by MSP Metals

1.5" X 6" Alloy Steel Rectangle Bar 4140 Heat Treated - 
Part #: mp-00002637

1.5" X 6" Alloy Steel Rectangle Bar 4140 Heat Treated -
Part #: mp-00002637

Click for more details

Dimensions

  • Thickness: 1.5"
  • Width: 6"
  • Ships In: 1 Business Day
See all available dimensions for this product
  • 12″ (1 ft.) - $221.86 ea.
  • 24″ (2 ft.) - $443.73 ea.
  • 36″ (3 ft.) - $665.59 ea.
  • 48″ (4 ft.) - $887.46 ea.
  • 60″ (5 ft.) - $1,109.32 ea.
  • 72″ (6 ft.) - $1,331.19 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

$221.86 ea.
$221.86 for 1
Sold and shipped by MSP Metals

2" X 3" Alloy Steel Rectangle Bar 4140 Heat Treated - 
Part #: mp-00002563

2" X 3" Alloy Steel Rectangle Bar 4140 Heat Treated -
Part #: mp-00002563

Click for more details

Dimensions

  • Thickness: 2"
  • Width: 3"
  • Ships In: 1 Business Day
See all available dimensions for this product
  • 12″ (1 ft.) - $130.75 ea.
  • 24″ (2 ft.) - $261.51 ea.
  • 36″ (3 ft.) - $392.26 ea.
  • 48″ (4 ft.) - $523.02 ea.
  • 60″ (5 ft.) - $653.77 ea.
  • 72″ (6 ft.) - $784.52 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

$130.75 ea.
$130.75 for 1
Sold and shipped by MSP Metals

2" X 6" Alloy Steel Rectangle Bar 4140 Heat Treated - 
Part #: mp-00002579

2" X 6" Alloy Steel Rectangle Bar 4140 Heat Treated -
Part #: mp-00002579

Click for more details

Dimensions

  • Thickness: 2"
  • Width: 6"
  • Ships In: 1 Business Day
See all available dimensions for this product
  • 12″ (1 ft.) - $261.51 ea.
  • 24″ (2 ft.) - $523.02 ea.
  • 36″ (3 ft.) - $784.52 ea.
  • 48″ (4 ft.) - $1,046.03 ea.
  • 60″ (5 ft.) - $1,307.54 ea.
  • 72″ (6 ft.) - $1,569.05 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

$261.51 ea.
$261.51 for 1
Sold and shipped by MSP Metals

2" X 4" Alloy Steel Rectangle Bar 4140 Heat Treated - 
Part #: mp-00002599

2" X 4" Alloy Steel Rectangle Bar 4140 Heat Treated -
Part #: mp-00002599

Click for more details

Dimensions

  • Thickness: 2"
  • Width: 4"
  • Ships In: 1 Business Day
See all available dimensions for this product
  • 12″ (1 ft.) - $174.57 ea.
  • 24″ (2 ft.) - $349.14 ea.
  • 36″ (3 ft.) - $523.71 ea.
  • 48″ (4 ft.) - $698.28 ea.
  • 60″ (5 ft.) - $872.85 ea.
  • 72″ (6 ft.) - $1,047.42 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

$174.57 ea.
$174.57 for 1
Sold and shipped by MSP Metals

2" X 8" Alloy Steel Rectangle Bar 4140 Heat Treated - 
Part #: mp-00002641

2" X 8" Alloy Steel Rectangle Bar 4140 Heat Treated -
Part #: mp-00002641

Click for more details

Dimensions

  • Thickness: 2"
  • Width: 8"
  • Ships In: 1 Business Day
See all available dimensions for this product
  • 12″ (1 ft.) - $348.45 ea.
  • 24″ (2 ft.) - $696.89 ea.
  • 36″ (3 ft.) - $1,045.34 ea.
  • 48″ (4 ft.) - $1,393.78 ea.
  • 60″ (5 ft.) - $1,742.23 ea.
  • 72″ (6 ft.) - $2,090.67 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

$348.45 ea.
$348.45 for 1
Sold and shipped by MSP Metals

2" X 2" Alloy Steel Rectangle Bar 4140 Heat Treated - 
Part #: mp-00002647

2" X 2" Alloy Steel Rectangle Bar 4140 Heat Treated -
Part #: mp-00002647

Click for more details

Dimensions

  • Thickness: 2"
  • Width: 2"
  • Ships In: 1 Business Day
See all available dimensions for this product
  • 12″ (1 ft.) - $86.94 ea.
  • 24″ (2 ft.) - $173.88 ea.
  • 36″ (3 ft.) - $260.81 ea.
  • 48″ (4 ft.) - $347.75 ea.
  • 60″ (5 ft.) - $434.69 ea.
  • 72″ (6 ft.) - $521.63 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

$86.94 ea.
$86.94 for 1
Sold and shipped by MSP Metals

2.5" X 2.5" Alloy Steel Rectangle Bar 4140 Heat Treated - 
Part #: mp-00002582

2.5" X 2.5" Alloy Steel Rectangle Bar 4140 Heat Treated -
Part #: mp-00002582

Click for more details

Dimensions

  • Thickness: 2.5"
  • Width: 2.5"
  • Ships In: 1 Business Day
See all available dimensions for this product
  • 12″ (1 ft.) - $153.71 ea.
  • 24″ (2 ft.) - $307.41 ea.
  • 36″ (3 ft.) - $461.12 ea.
  • 48″ (4 ft.) - $614.82 ea.
  • 60″ (5 ft.) - $768.53 ea.
  • 72″ (6 ft.) - $922.23 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

$153.71 ea.
$153.71 for 1
Sold and shipped by MSP Metals
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