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Alloy Steel Rectangle Bar 4140 Heat Treat

-70 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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0.25" X 1" Alloy Steel Rectangle Bar 4140 Heat Treated - 
Part #: mp-00002669

0.25" X 1" Alloy Steel Rectangle Bar 4140 Heat Treated -
Part #: mp-00002669

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Dimensions

  • Thickness: 0.25"
See all available dimensions for this product
  • 12″ (1 ft.) - $10.22 ea.
  • 24″ (2 ft.) - $20.43 ea.
  • 36″ (3 ft.) - $30.65 ea.
  • 48″ (4 ft.) - $40.86 ea.
  • 60″ (5 ft.) - $51.08 ea.
  • 72″ (6 ft.) - $61.29 ea.

QTY

$10.22 ea.
$10.22 for 1
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Qty
Price ea.
Savings
2-4
$9.91
3%
5-9
$9.71
4%
10+
$9.20
9%
More
Less
Sold and shipped by MSP Metals

0.375" X 1" Alloy Steel Rectangle Bar 4140 Heat Treated - 
Part #: mp-00002653

0.375" X 1" Alloy Steel Rectangle Bar 4140 Heat Treated -
Part #: mp-00002653

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Dimensions

  • Thickness: 0.375"
See all available dimensions for this product
  • 12″ (1 ft.) - $12.51 ea.
  • 24″ (2 ft.) - $25.01 ea.
  • 36″ (3 ft.) - $37.52 ea.
  • 48″ (4 ft.) - $50.02 ea.
  • 60″ (5 ft.) - $62.53 ea.
  • 72″ (6 ft.) - $75.04 ea.

QTY

$12.51 ea.
$12.51 for 1
qty discount iconBuy More & Save up to 9% !
Qty
Price ea.
Savings
2-4
$12.13
3%
5-9
$11.88
5%
10+
$11.26
9%
More
Less
Sold and shipped by MSP Metals

0.5" X 1" Alloy Steel Rectangle Bar 4140 Heat Treated - 
Part #: mp-00002651

0.5" X 1" Alloy Steel Rectangle Bar 4140 Heat Treated -
Part #: mp-00002651

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Dimensions

  • Thickness: 0.5"
See all available dimensions for this product
  • 12″ (1 ft.) - $13.95 ea.
  • 24″ (2 ft.) - $27.90 ea.
  • 36″ (3 ft.) - $41.85 ea.
  • 48″ (4 ft.) - $55.80 ea.
  • 60″ (5 ft.) - $69.75 ea.
  • 72″ (6 ft.) - $83.70 ea.
Create Custom Cut

QTY

$13.95 ea.
$13.95 for 1
qty discount iconBuy More & Save up to 9% !
Qty
Price ea.
Savings
2-4
$13.53
3%
5-9
$13.25
5%
10+
$12.56
9%
More
Less
Sold and shipped by MSP Metals

0.25" X 1.5" Alloy Steel Rectangle Bar 4140 Heat Treated - 
Part #: mp-00002591

0.25" X 1.5" Alloy Steel Rectangle Bar 4140 Heat Treated -
Part #: mp-00002591

Click for more details

Dimensions

  • Thickness: 0.25"
See all available dimensions for this product
  • 12″ (1 ft.) - $14.76 ea.
  • 24″ (2 ft.) - $29.51 ea.
  • 36″ (3 ft.) - $44.27 ea.
  • 48″ (4 ft.) - $59.02 ea.
  • 60″ (5 ft.) - $73.78 ea.
  • 72″ (6 ft.) - $88.53 ea.

QTY

$14.76 ea.
$14.76 for 1
qty discount iconBuy More & Save up to 10% !
Qty
Price ea.
Savings
2-4
$14.32
2%
5-9
$14.02
5%
10+
$13.28
10%
More
Less
Sold and shipped by MSP Metals

0.625" X 1" Alloy Steel Rectangle Bar 4140 Heat Treated - 
Part #: mp-00002549

0.625" X 1" Alloy Steel Rectangle Bar 4140 Heat Treated -
Part #: mp-00002549

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Dimensions

  • Thickness: 0.625"
See all available dimensions for this product
  • 12″ (1 ft.) - $15.84 ea.
  • 24″ (2 ft.) - $31.68 ea.
  • 36″ (3 ft.) - $47.52 ea.
  • 48″ (4 ft.) - $63.36 ea.
  • 60″ (5 ft.) - $79.20 ea.
  • 72″ (6 ft.) - $95.04 ea.

QTY

$15.84 ea.
$15.84 for 1
qty discount iconBuy More & Save up to 9% !
Qty
Price ea.
Savings
2-4
$15.36
3%
5-9
$15.05
4%
10+
$14.26
9%
More
Less
Sold and shipped by MSP Metals

0.375" X 1.5" Alloy Steel Rectangle Bar 4140 Heat Treated - 
Part #: mp-00002576

0.375" X 1.5" Alloy Steel Rectangle Bar 4140 Heat Treated -
Part #: mp-00002576

Click for more details

Dimensions

  • Thickness: 0.375"
See all available dimensions for this product
  • 12″ (1 ft.) - $19.24 ea.
  • 24″ (2 ft.) - $38.48 ea.
  • 36″ (3 ft.) - $57.72 ea.
  • 48″ (4 ft.) - $76.96 ea.
  • 60″ (5 ft.) - $96.20 ea.
  • 72″ (6 ft.) - $115.44 ea.

QTY

$19.24 ea.
$19.24 for 1
qty discount iconBuy More & Save up to 9% !
Qty
Price ea.
Savings
2-4
$18.66
3%
5-9
$18.28
4%
10+
$17.32
9%
More
Less
Sold and shipped by MSP Metals

0.75" X 1" Alloy Steel Rectangle Bar 4140 Heat Treated - 
Part #: mp-00002536

0.75" X 1" Alloy Steel Rectangle Bar 4140 Heat Treated -
Part #: mp-00002536

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Dimensions

  • Thickness: 0.75"
See all available dimensions for this product
  • 12″ (1 ft.) - $19.44 ea.
  • 24″ (2 ft.) - $38.88 ea.
  • 36″ (3 ft.) - $58.32 ea.
  • 48″ (4 ft.) - $77.76 ea.
  • 60″ (5 ft.) - $97.20 ea.
  • 72″ (6 ft.) - $116.64 ea.

QTY

$19.44 ea.
$19.44 for 1
qty discount iconBuy More & Save up to 9% !
Qty
Price ea.
Savings
2-4
$18.86
2%
5-9
$18.47
4%
10+
$17.50
9%
More
Less
Sold and shipped by MSP Metals

0.25" X 2" Alloy Steel Rectangle Bar 4140 Heat Treated - 
Part #: mp-00002633

0.25" X 2" Alloy Steel Rectangle Bar 4140 Heat Treated -
Part #: mp-00002633

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Dimensions

  • Thickness: 0.25"
See all available dimensions for this product
  • 12″ (1 ft.) - $20.43 ea.
  • 24″ (2 ft.) - $40.86 ea.
  • 36″ (3 ft.) - $61.29 ea.
  • 48″ (4 ft.) - $81.72 ea.
  • 60″ (5 ft.) - $102.15 ea.
  • 72″ (6 ft.) - $122.58 ea.

QTY

$20.43 ea.
$20.43 for 1
qty discount iconBuy More & Save up to 9% !
Qty
Price ea.
Savings
2-4
$19.82
2%
5-9
$19.41
4%
10+
$18.39
9%
More
Less
Sold and shipped by MSP Metals

0.5" X 1.5" Alloy Steel Rectangle Bar 4140 Heat Treated - 
Part #: mp-00002640

0.5" X 1.5" Alloy Steel Rectangle Bar 4140 Heat Treated -
Part #: mp-00002640

Click for more details

Dimensions

  • Thickness: 0.5"
See all available dimensions for this product
  • 12″ (1 ft.) - $20.93 ea.
  • 24″ (2 ft.) - $41.85 ea.
  • 36″ (3 ft.) - $62.78 ea.
  • 48″ (4 ft.) - $83.70 ea.
  • 60″ (5 ft.) - $104.63 ea.
  • 72″ (6 ft.) - $125.55 ea.

QTY

$20.93 ea.
$20.93 for 1
qty discount iconBuy More & Save up to 9% !
Qty
Price ea.
Savings
2-4
$20.30
3%
5-9
$19.88
5%
10+
$18.84
9%
More
Less
Sold and shipped by MSP Metals

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

Click for more details

Dimensions

  • Thickness: 1"
See all available dimensions for this product
  • 12″ (1 ft.) - $22.75 ea.
  • 24″ (2 ft.) - $45.50 ea.
  • 36″ (3 ft.) - $68.25 ea.
  • 48″ (4 ft.) - $91.00 ea.
  • 60″ (5 ft.) - $113.75 ea.
  • 72″ (6 ft.) - $136.50 ea.

QTY

$22.75 ea.
$22.75 for 1
qty discount iconBuy More & Save up to 9% !
Qty
Price ea.
Savings
2-4
$22.07
2%
5-9
$21.61
5%
10+
$20.48
9%
More
Less
Sold and shipped by MSP Metals

0.625" X 1.5" Alloy Steel Rectangle Bar 4140 Heat Treated - 
Part #: mp-00002590

0.625" X 1.5" Alloy Steel Rectangle Bar 4140 Heat Treated -
Part #: mp-00002590

Click for more details

Dimensions

  • Thickness: 0.625"
See all available dimensions for this product
  • 12″ (1 ft.) - $23.76 ea.
  • 24″ (2 ft.) - $47.52 ea.
  • 36″ (3 ft.) - $71.28 ea.
  • 48″ (4 ft.) - $95.04 ea.
  • 60″ (5 ft.) - $118.80 ea.
  • 72″ (6 ft.) - $142.56 ea.

QTY

$23.76 ea.
$23.76 for 1
qty discount iconBuy More & Save up to 10% !
Qty
Price ea.
Savings
2-4
$23.05
2%
5-9
$22.57
5%
10+
$21.38
10%
More
Less
Sold and shipped by MSP Metals

0.375" X 2" Alloy Steel Rectangle Bar 4140 Heat Treated - 
Part #: mp-00002620

0.375" X 2" Alloy Steel Rectangle Bar 4140 Heat Treated -
Part #: mp-00002620

Click for more details

Dimensions

  • Thickness: 0.375"
See all available dimensions for this product
  • 12″ (1 ft.) - $25.97 ea.
  • 24″ (2 ft.) - $51.95 ea.
  • 36″ (3 ft.) - $77.92 ea.
  • 48″ (4 ft.) - $103.90 ea.
  • 60″ (5 ft.) - $129.87 ea.
  • 72″ (6 ft.) - $155.84 ea.

QTY

$25.97 ea.
$25.97 for 1
qty discount iconBuy More & Save up to 10% !
Qty
Price ea.
Savings
2-4
$25.19
3%
5-9
$24.67
5%
10+
$23.37
10%
More
Less
Sold and shipped by MSP Metals

0.5" X 2" Alloy Steel Rectangle Bar 4140 Heat Treated - 
Part #: mp-00002600

0.5" X 2" Alloy Steel Rectangle Bar 4140 Heat Treated -
Part #: mp-00002600

Click for more details

Dimensions

  • Thickness: 0.5"
See all available dimensions for this product
  • 12″ (1 ft.) - $27.13 ea.
  • 24″ (2 ft.) - $54.25 ea.
  • 36″ (3 ft.) - $81.38 ea.
  • 48″ (4 ft.) - $108.50 ea.
  • 60″ (5 ft.) - $135.63 ea.
  • 72″ (6 ft.) - $162.75 ea.

QTY

$27.13 ea.
$27.13 for 1
qty discount iconBuy More & Save up to 9% !
Qty
Price ea.
Savings
2-4
$26.32
2%
5-9
$25.77
5%
10+
$24.42
9%
More
Less
Sold and shipped by MSP Metals

0.75" X 1.5" Alloy Steel Rectangle Bar 4140 Heat Treated - 
Part #: mp-00002545

0.75" X 1.5" Alloy Steel Rectangle Bar 4140 Heat Treated -
Part #: mp-00002545

Click for more details

Dimensions

  • Thickness: 0.75"
See all available dimensions for this product
  • 12″ (1 ft.) - $28.80 ea.
  • 24″ (2 ft.) - $57.60 ea.
  • 36″ (3 ft.) - $86.40 ea.
  • 48″ (4 ft.) - $115.20 ea.
  • 60″ (5 ft.) - $144.00 ea.
  • 72″ (6 ft.) - $172.80 ea.

QTY

$28.80 ea.
$28.80 for 1
qty discount iconBuy More & Save up to 10% !
Qty
Price ea.
Savings
2-4
$27.94
2%
5-9
$27.36
5%
10+
$25.92
10%
More
Less
Sold and shipped by MSP Metals

0.25" X 3" Alloy Steel Rectangle Bar 4140 Heat Treated - 
Part #: mp-00002662

0.25" X 3" Alloy Steel Rectangle Bar 4140 Heat Treated -
Part #: mp-00002662

Click for more details

Dimensions

  • Thickness: 0.25"
See all available dimensions for this product
  • 12″ (1 ft.) - $30.65 ea.
  • 24″ (2 ft.) - $61.29 ea.
  • 36″ (3 ft.) - $91.94 ea.
  • 48″ (4 ft.) - $122.58 ea.
  • 60″ (5 ft.) - $153.23 ea.
  • 72″ (6 ft.) - $183.87 ea.

QTY

$30.65 ea.
$30.65 for 1
qty discount iconBuy More & Save up to 9% !
Qty
Price ea.
Savings
2-4
$29.73
3%
5-9
$29.12
4%
10+
$27.59
9%
More
Less
Sold and shipped by MSP Metals

0.625" X 2" Alloy Steel Rectangle Bar 4140 Heat Treated - 
Part #: mp-00002577

0.625" X 2" Alloy Steel Rectangle Bar 4140 Heat Treated -
Part #: mp-00002577

Click for more details

Dimensions

  • Thickness: 0.625"
See all available dimensions for this product
  • 12″ (1 ft.) - $31.68 ea.
  • 24″ (2 ft.) - $63.36 ea.
  • 36″ (3 ft.) - $95.04 ea.
  • 48″ (4 ft.) - $126.72 ea.
  • 60″ (5 ft.) - $158.40 ea.
  • 72″ (6 ft.) - $190.08 ea.

QTY

$31.68 ea.
$31.68 for 1
qty discount iconBuy More & Save up to 10% !
Qty
Price ea.
Savings
2-4
$30.73
2%
5-9
$30.10
4%
10+
$28.51
10%
More
Less
Sold and shipped by MSP Metals

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

Click for more details

Dimensions

  • Thickness: 1"
See all available dimensions for this product
  • 12″ (1 ft.) - $34.45 ea.
  • 24″ (2 ft.) - $68.90 ea.
  • 36″ (3 ft.) - $103.35 ea.
  • 48″ (4 ft.) - $137.80 ea.
  • 60″ (5 ft.) - $172.25 ea.
  • 72″ (6 ft.) - $206.70 ea.
Create Custom Cut

QTY

$34.45 ea.
$34.45 for 1
qty discount iconBuy More & Save up to 9% !
Qty
Price ea.
Savings
2-4
$33.42
2%
5-9
$32.73
4%
10+
$31.01
9%
More
Less
Sold and shipped by MSP Metals

0.75" X 2" Alloy Steel Rectangle Bar 4140 Heat Treated - 
Part #: mp-00002556

0.75" X 2" Alloy Steel Rectangle Bar 4140 Heat Treated -
Part #: mp-00002556

Click for more details

Dimensions

  • Thickness: 0.75"
See all available dimensions for this product
  • 12″ (1 ft.) - $38.16 ea.
  • 24″ (2 ft.) - $76.32 ea.
  • 36″ (3 ft.) - $114.48 ea.
  • 48″ (4 ft.) - $152.64 ea.
  • 60″ (5 ft.) - $190.80 ea.
  • 72″ (6 ft.) - $228.96 ea.

QTY

$38.16 ea.
$38.16 for 1
qty discount iconBuy More & Save up to 10% !
Qty
Price ea.
Savings
2-4
$37.02
2%
5-9
$36.25
5%
10+
$34.34
10%
More
Less
Sold and shipped by MSP Metals

0.375" X 3" Alloy Steel Rectangle Bar 4140 Heat Treated - 
Part #: mp-00002622

0.375" X 3" Alloy Steel Rectangle Bar 4140 Heat Treated -
Part #: mp-00002622

Click for more details

Dimensions

  • Thickness: 0.375"
See all available dimensions for this product
  • 12″ (1 ft.) - $38.48 ea.
  • 24″ (2 ft.) - $76.96 ea.
  • 36″ (3 ft.) - $115.44 ea.
  • 48″ (4 ft.) - $153.92 ea.
  • 60″ (5 ft.) - $192.40 ea.
  • 72″ (6 ft.) - $230.88 ea.

QTY

$38.48 ea.
$38.48 for 1
qty discount iconBuy More & Save up to 10% !
Qty
Price ea.
Savings
2-4
$37.33
2%
5-9
$36.56
4%
10+
$34.63
10%
More
Less
Sold and shipped by MSP Metals

0.25" X 4" Alloy Steel Rectangle Bar 4140 Heat Treated - 
Part #: mp-00002626

0.25" X 4" Alloy Steel Rectangle Bar 4140 Heat Treated -
Part #: mp-00002626

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Dimensions

  • Thickness: 0.25"
See all available dimensions for this product
  • 12″ (1 ft.) - $39.73 ea.
  • 24″ (2 ft.) - $79.45 ea.
  • 36″ (3 ft.) - $119.18 ea.
  • 48″ (4 ft.) - $158.90 ea.
  • 60″ (5 ft.) - $198.63 ea.
  • 72″ (6 ft.) - $238.35 ea.
Create Custom Cut

QTY

$39.73 ea.
$39.73 for 1
qty discount iconBuy More & Save up to 9% !
Qty
Price ea.
Savings
2-4
$38.54
2%
5-9
$37.74
5%
10+
$35.76
9%
More
Less
Sold and shipped by MSP Metals

0.5" X 3" Alloy Steel Rectangle Bar 4140 Heat Treated - 
Part #: mp-00002575

0.5" X 3" Alloy Steel Rectangle Bar 4140 Heat Treated -
Part #: mp-00002575

Click for more details

Dimensions

  • Thickness: 0.5"
See all available dimensions for this product
  • 12″ (1 ft.) - $41.08 ea.
  • 24″ (2 ft.) - $82.15 ea.
  • 36″ (3 ft.) - $123.23 ea.
  • 48″ (4 ft.) - $164.30 ea.
  • 60″ (5 ft.) - $205.38 ea.
  • 72″ (6 ft.) - $246.45 ea.

QTY

$41.08 ea.
$41.08 for 1
qty discount iconBuy More & Save up to 10% !
Qty
Price ea.
Savings
2-4
$39.85
2%
5-9
$39.03
4%
10+
$36.97
10%
More
Less
Sold and shipped by MSP Metals

1" X 2" Alloy Steel Rectangle Bar 4140 Heat Treated - 
Part #: mp-00002566

1" X 2" Alloy Steel Rectangle Bar 4140 Heat Treated -
Part #: mp-00002566

Click for more details

Dimensions

  • Thickness: 1"
See all available dimensions for this product
  • 12″ (1 ft.) - $46.15 ea.
  • 24″ (2 ft.) - $92.30 ea.
  • 36″ (3 ft.) - $138.45 ea.
  • 48″ (4 ft.) - $184.60 ea.
  • 60″ (5 ft.) - $230.75 ea.
  • 72″ (6 ft.) - $276.90 ea.

QTY

$46.15 ea.
$46.15 for 1
qty discount iconBuy More & Save up to 9% !
Qty
Price ea.
Savings
2-4
$44.77
2%
5-9
$43.84
5%
10+
$41.54
9%
More
Less
Sold and shipped by MSP Metals

0.625" X 3" Alloy Steel Rectangle Bar 4140 Heat Treated - 
Part #: mp-00002642

0.625" X 3" Alloy Steel Rectangle Bar 4140 Heat Treated -
Part #: mp-00002642

Click for more details

Dimensions

  • Thickness: 0.625"
See all available dimensions for this product
  • 12″ (1 ft.) - $47.52 ea.
  • 24″ (2 ft.) - $95.04 ea.
  • 36″ (3 ft.) - $142.56 ea.
  • 48″ (4 ft.) - $190.08 ea.
  • 60″ (5 ft.) - $237.60 ea.
  • 72″ (6 ft.) - $285.12 ea.

QTY

$47.52 ea.
$47.52 for 1
qty discount iconBuy More & Save up to 9% !
Qty
Price ea.
Savings
2-4
$46.09
3%
5-9
$45.14
5%
10+
$42.77
9%
More
Less
Sold and shipped by MSP Metals

0.375" X 4" Alloy Steel Rectangle Bar 4140 Heat Treated - 
Part #: mp-00002644

0.375" X 4" Alloy Steel Rectangle Bar 4140 Heat Treated -
Part #: mp-00002644

Click for more details

Dimensions

  • Thickness: 0.375"
See all available dimensions for this product
  • 12″ (1 ft.) - $50.99 ea.
  • 24″ (2 ft.) - $101.97 ea.
  • 36″ (3 ft.) - $152.96 ea.
  • 48″ (4 ft.) - $203.94 ea.
  • 60″ (5 ft.) - $254.93 ea.
  • 72″ (6 ft.) - $305.92 ea.

QTY

$50.99 ea.
$50.99 for 1
qty discount iconBuy More & Save up to 10% !
Qty
Price ea.
Savings
2-4
$49.46
3%
5-9
$48.44
5%
10+
$45.89
10%
More
Less
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"
See all available dimensions for this product
  • 12″ (1 ft.) - $52.00 ea.
  • 24″ (2 ft.) - $104.00 ea.
  • 36″ (3 ft.) - $156.00 ea.
  • 48″ (4 ft.) - $208.00 ea.
  • 60″ (5 ft.) - $260.00 ea.
  • 72″ (6 ft.) - $312.00 ea.
Create Custom Cut

QTY

$52.00 ea.
$52.00 for 1
qty discount iconBuy More & Save up to 10% !
Qty
Price ea.
Savings
2-4
$50.44
3%
5-9
$49.40
5%
10+
$46.80
10%
More
Less
Sold and shipped by MSP Metals
  • 1
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