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4340

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4340 Product Guide Product   | 4340 Alloy Steel Tolerance Guide product

Alloy Steel 4340 steel has high strength, toughness, wear resistance, and fatigue strength. It can be machined in all states other than hardened and it is easily welded. Additionally, 4340 can be cold worked easily in the annealed state. This material is typically used in military aircraft, automotive systems, hydraulic parts, machine tools, and a steel crankshafts.

 

We carry 4330 alloy steel in hex bar, rectangle bar, square bar, round bar & sheet/plate.

 

NEW! - We offer waterjet services for this product. Learn More | Request Quote >

 

Relevant Knowledge Hub Resources: 5 Reasons to Cut-to-Size | Understanding Steel

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2.25" Alloy Steel Round Bar 4340-Normalized Rough Turned - 
Part #: 7401

2.25" Alloy Steel Round Bar 4340-Normalized Rough Turned -
Part #: 7401

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Dimensions

  • Diameter: 2.25"
See all available dimensions for this product
  • 12″ (1 ft.) - $111.66 ea.
  • 24″ (2 ft.) - $211.07 ea.
  • 36″ (3 ft.) - $311.68 ea.

    Buy 4 at the 12 ft price!

  • 44″ (44 in.) - $371.95 ea.

    Order to avoid UPS additional handling fees

  • 48″ (4 ft.) - $404.14 ea.
  • 72″ (6 ft.) - $557.13 ea.
  • 96″ (8 ft.) - $713.38 ea.
  • 144″ (12 ft.) - $981.72 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

$111.66 ea.
$111.66 for 1
SALE! Save BIG on end of Year Deals!

2.375" Alloy Steel Round Bar 4340-Normalized Rough Turned - 
Part #: 7402

2.375" Alloy Steel Round Bar 4340-Normalized Rough Turned -
Part #: 7402

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alloy-steel-round-bar-4340-normalized-rough-turned-1superZoom

Dimensions

  • Diameter: 2.375"
See all available dimensions for this product
  • 12″ (1 ft.) - $151.92 ea.
  • 24″ (2 ft.) - $287.15 ea.
  • 36″ (3 ft.) - $424.03 ea.

    Buy 4 at the 12 ft price!

  • 44″ (44 in.) - $506.07 ea.

    Order to avoid UPS additional handling fees

  • 48″ (4 ft.) - $549.80 ea.
  • 72″ (6 ft.) - $757.93 ea.
  • 96″ (8 ft.) - $970.49 ea.
  • 144″ (12 ft.) - $1,335.56 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

$151.92 ea.
$151.92 for 1

2.5" Alloy Steel Round Bar 4340-Normalized Rough Turned - 
Part #: 7403

2.5" Alloy Steel Round Bar 4340-Normalized Rough Turned -
Part #: 7403

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alloy-steel-round-bar-4340-normalized-rough-turned-1superZoom

Dimensions

  • Diameter: 2.5"
See all available dimensions for this product
  • 12″ (1 ft.) - $247.56 ea.
  • 24″ (2 ft.) - $467.93 ea.
  • 36″ (3 ft.) - $691.01 ea.

    Buy 4 at the 12 ft price!

  • 44″ (44 in.) - $824.58 ea.

    Order to avoid UPS additional handling fees

  • 48″ (4 ft.) - $895.97 ea.
  • 72″ (6 ft.) - $1,235.13 ea.
  • 96″ (8 ft.) - $1,581.55 ea.
  • 144″ (12 ft.) - $2,176.44 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

$247.56 ea.
$247.56 for 1

2.5" x 3" Alloy Steel Rectangle Bar 4340 - 
Part #: 25393

2.5" x 3" Alloy Steel Rectangle Bar 4340 -
Part #: 25393

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Dimensions

  • Thickness: 2.5"
  • Width: 3"
See all available dimensions for this product
  • 12″ (1 ft.) - $352.39 ea.
  • 24″ (2 ft.) - $666.05 ea.
  • 36″ (3 ft.) - $983.56 ea.

    Buy 4 at the 12 ft price!

  • 44″ (44 in.) - $1,173.76 ea.

    Order to avoid UPS additional handling fees

  • 48″ (4 ft.) - $1,275.29 ea.
  • 72″ (6 ft.) - $1,758.05 ea.
  • 96″ (8 ft.) - $2,251.11 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.

QTY

$352.39 ea.
$352.39 for 1

2.5" Alloy Steel Plate 4340 - 
Part #: 28960

2.5" Alloy Steel Plate 4340-
Part #: 28960

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Dimensions

  • Thickness: 2.5"
  • Ships In: 5-7 Business Days
See all available dimensions for this product
Pricing and availability for this item changes frequently. Contact us now for a fast quote.

2.75" Alloy Steel Round Bar 4340-Normalized Rough Turned - 
Part #: 7405

2.75" Alloy Steel Round Bar 4340-Normalized Rough Turned -
Part #: 7405

Click for more details

alloy-steel-round-bar-4340-normalized-rough-turned-1superZoom

Dimensions

  • Diameter: 2.75"
See all available dimensions for this product
  • 12″ (1 ft.) - $165.19 ea.
  • 24″ (2 ft.) - $312.23 ea.
  • 36″ (3 ft.) - $461.09 ea.

    Buy 4 at the 12 ft price!

  • 44″ (44 in.) - $550.26 ea.

    Order to avoid UPS additional handling fees

  • 48″ (4 ft.) - $597.84 ea.
  • 72″ (6 ft.) - $824.15 ea.
  • 96″ (8 ft.) - $1,055.29 ea.
  • 144″ (12 ft.) - $1,452.24 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

$165.19 ea.
$165.19 for 1
quantity discountBuy More & Save up to 19% !
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Price ea.
Savings
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$132.83
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2.75" Alloy Steel Plate 4340 Annealed - 
Part #: 28997

2.75" Alloy Steel Plate 4340 Annealed-
Part #: 28997

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Dimensions

  • Thickness: 2.75"
  • Ships In: 5-7 Business Days
See all available dimensions for this product
Pricing and availability for this item changes frequently. Contact us now for a fast quote.

3" Alloy Steel Round Bar 4340-Normalized Rough Turned - 
Part #: 7406

3" Alloy Steel Round Bar 4340-Normalized Rough Turned -
Part #: 7406

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alloy-steel-round-bar-4340-normalized-rough-turned-1superZoom

Dimensions

  • Diameter: 3"
See all available dimensions for this product
  • 12″ (1 ft.) - $259.46 ea.
  • 24″ (2 ft.) - $490.41 ea.
  • 36″ (3 ft.) - $724.20 ea.

    Buy 4 at the 12 ft price!

  • 44″ (44 in.) - $864.23 ea.

    Order to avoid UPS additional handling fees

  • 48″ (4 ft.) - $939.00 ea.
  • 144″ (12 ft.) - $2,280.96 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

$259.46 ea.
$259.46 for 1

3" Alloy Steel Plate 4340 Annealed - 
Part #: 25345

3" Alloy Steel Plate 4340 Annealed-
Part #: 25345

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

Dimensions

  • Thickness: 3"
  • Ships In: 5-7 Business Days
See all available dimensions for this product
Pricing and availability for this item changes frequently. Contact us now for a fast quote.

3" x 6" Alloy Steel Rectangle Bar 4340 Hot Rolled - 
Part #: 25682

3" x 6" Alloy Steel Rectangle Bar 4340 Hot Rolled -
Part #: 25682

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

Dimensions

  • Thickness: 3"
  • Width: 6"
See all available dimensions for this product
  • 12″ (1 ft.) - $1,076.41 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.

QTY

$1,076.41 ea.
$1,076.41 for 1

3" Alloy Steel Square Bar 4340-Normalized & Tempered with Radius Corner - 
Part #: 28043

3" Alloy Steel Square Bar 4340-Normalized & Tempered with Radius Corner-
Part #: 28043

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stainless-square-bar-440c-oversize-1superZoom

Dimensions

  • Height: 3"
See all available dimensions for this product
Pricing and availability for this item changes frequently. Contact us now for a fast quote.

3.25" Alloy Steel Round Bar 4340-Hot Rolled, Normalized & Tempered - 
Part #: 28458

3.25" Alloy Steel Round Bar 4340-Hot Rolled, Normalized & Tempered-
Part #: 28458

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Dimensions

  • Diameter: 3.25"
See all available dimensions for this product
Pricing and availability for this item changes frequently. Contact us now for a fast quote.

3.5" Alloy Steel Round Bar 4340-Normalized Rough Turned - 
Part #: 7408

3.5" Alloy Steel Round Bar 4340-Normalized Rough Turned-
Part #: 7408

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alloy-steel-round-bar-4340-normalized-rough-turned-1superZoom

Dimensions

  • Diameter: 3.5"
See all available dimensions for this product
Pricing and availability for this item changes frequently. Contact us now for a fast quote.

3.5" Alloy Steel Round Bar 4340-Annealed Hot Rolled - 
Part #: 25270

3.5" Alloy Steel Round Bar 4340-Annealed Hot Rolled -
Part #: 25270

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alloy-steel-round-bar-4340-normalized-rough-turned-1superZoom

Dimensions

  • Diameter: 3.5"
See all available dimensions for this product
  • 12″ (1 ft.) - $446.71 ea.
  • 24″ (2 ft.) - $844.31 ea.
  • 36″ (3 ft.) - $1,246.84 ea.

    Buy 4 at the 12 ft price!

  • 44″ (44 in.) - $1,487.88 ea.

    Order to avoid UPS additional handling fees

  • 48″ (4 ft.) - $1,616.64 ea.
  • 72″ (6 ft.) - $2,228.60 ea.
  • 96″ (8 ft.) - $2,853.64 ea.
  • 144″ (12 ft.) - $3,927.04 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

$446.71 ea.
$446.71 for 1

3.5" Alloy Steel Plate 4340 Annealed - 
Part #: 25657

3.5" Alloy Steel Plate 4340 Annealed-
Part #: 25657

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

Dimensions

  • Thickness: 3.5"
  • Ships In: 5-7 Business Days
See all available dimensions for this product
Pricing and availability for this item changes frequently. Contact us now for a fast quote.

3.5" Alloy Steel Round Bar 4340-Hot Rolled, Normalized & Tempered - 
Part #: 28889

3.5" Alloy Steel Round Bar 4340-Hot Rolled, Normalized & Tempered-
Part #: 28889

Click for more details

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Dimensions

  • Diameter: 3.5"
See all available dimensions for this product
Pricing and availability for this item changes frequently. Contact us now for a fast quote.

4" Alloy Steel Plate 4340 Annealed - 
Part #: 25346

4" Alloy Steel Plate 4340 Annealed -
Part #: 25346

Click for more details

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

Dimensions

  • Thickness: 4"
See all available dimensions for this product
  • 12″ X 12″ (1 X 1 ft.) - $3,052.28 ea.
  • 12″ X 24″ (1 X 2 ft.) - $5,790.35 ea.
  • 12″ X 36″ (1 X 3 ft.) - $8,550.86 ea.
  • 12″ X 48″ (1 X 4 ft.) - $11,086.94 ea.
  • 24″ X 24″ (2 X 2 ft.) - $11,086.94 ea.
  • 24″ X 36″ (2 X 3 ft.) - $15,889.76 ea.
  • 24″ X 48″ (2 X 4 ft.) - $20,378.40 ea.
  • 36″ X 36″ (3 X 3 ft.) - $22,319.74 ea.
  • 36″ X 48″ (3 X 4 ft.) - $29,355.68 ea.
  • 36″ X 120″ (3 X 10 ft.) - $67,329.52 ea.
  • 48″ X 120″ (4 X 10 ft.) - $89,772.70 ea.
  • 48″ X 144″ (4 X 12 ft.) - $107,727.24 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.

QTY

$3,052.28 ea.
$3,052.28 for 1

4" x 6" Alloy Steel Rectangle Bar 4340 Hot Rolled - 
Part #: 25683

4" x 6" Alloy Steel Rectangle Bar 4340 Hot Rolled-
Part #: 25683

Click for more details

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

Dimensions

  • Thickness: 4"
  • Width: 6"
See all available dimensions for this product
Pricing and availability for this item changes frequently. Contact us now for a fast quote.
SALE! 30% off on 24" Length

4" Alloy Steel Round Bar 4340-Normalized Rough Turned - 
Part #: 7410

4" Alloy Steel Round Bar 4340-Normalized Rough Turned -
Part #: 7410

Click for more details

alloy-steel-round-bar-4340-normalized-rough-turned-1superZoom

Dimensions

  • Diameter: 4"
See all available dimensions for this product
  • 12″ (1 ft.) - $362.19 ea.
  • 24″ (2 ft.) - $479.22 ea.
  • 36″ (3 ft.) - $1,010.97 ea.

    Buy 4 at the 12 ft price!

  • 44″ (44 in.) - $1,206.45 ea.

    Order to avoid UPS additional handling fees

  • 48″ (4 ft.) - $1,310.80 ea.
  • 72″ (6 ft.) - $1,807.01 ea.
  • 96″ (8 ft.) - $2,313.81 ea.
  • 144″ (12 ft.) - $3,184.14 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

$362.19 ea.
$362.19 for 1

4.5" Alloy Steel Round Bar 4340-Normalized Rough Turned - 
Part #: 7411

4.5" Alloy Steel Round Bar 4340-Normalized Rough Turned-
Part #: 7411

Click for more details

alloy-steel-round-bar-4340-normalized-rough-turned-1superZoom

Dimensions

  • Diameter: 4.5"
See all available dimensions for this product
Pricing and availability for this item changes frequently. Contact us now for a fast quote.

4.5" Alloy Steel Plate 4340 Annealed - 
Part #: 25658

4.5" Alloy Steel Plate 4340 Annealed-
Part #: 25658

Click for more details

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

Dimensions

  • Thickness: 4.5"
  • Ships In: 5-7 Business Days
See all available dimensions for this product
Pricing and availability for this item changes frequently. Contact us now for a fast quote.

5" Alloy Steel Square Bar 4340 - 
Part #: 20337

5" Alloy Steel Square Bar 4340-
Part #: 20337

Click for more details

stainless-square-bar-440c-oversize-1superZoom

Dimensions

  • Height: 5"
See all available dimensions for this product
Pricing and availability for this item changes frequently. Contact us now for a fast quote.

5" Alloy Steel Plate 4340 Annealed - 
Part #: 25347

5" Alloy Steel Plate 4340 Annealed-
Part #: 25347

Click for more details

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

Dimensions

  • Thickness: 5"
  • Ships In: 5-7 Business Days
See all available dimensions for this product
Pricing and availability for this item changes frequently. Contact us now for a fast quote.

5" Alloy Steel Round Bar 4340-Normalized Rough Turned - 
Part #: 7413

5" Alloy Steel Round Bar 4340-Normalized Rough Turned -
Part #: 7413

Click for more details

alloy-steel-round-bar-4340-normalized-rough-turned-1superZoom

Dimensions

  • Diameter: 5"
See all available dimensions for this product
  • 12″ (1 ft.) - $615.10 ea.
  • 24″ (2 ft.) - $1,162.60 ea.
  • 144″ (12 ft.) - $5,407.46 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

$615.10 ea.
$615.10 for 1

0.1875" Alloy Steel Sheet 4340 Annealed - 
Part #: 27849

0.1875" Alloy Steel Sheet 4340 Annealed-
Part #: 27849

Click for more details

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

Dimensions

  • Ships In: 5-7 Business Days
See all available dimensions for this product
Pricing and availability for this item changes frequently. Contact us now for a fast quote.
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