New Lower Shipping Rates! Get the industry's best ground prices and save more—especially on longer lengths.  

Shop all Products
Explore OLM Rewards
Deals
Get a Quick Quote!

Alloy Steel Hex Bar 4340

-3 Products

4340 is a high-strength, low-alloy steel containing chromium, nickel, and molybdenum that provides excellent toughness, fatigue strength, and wear resistance. Hex bars made from this heat-treatable 4340 alloy steel are commonly used for applications requiring high mechanical properties and durability, such as machine tools, automotive components, shafts, structural parts, and aerospace components. The hexagonal cross-section shape of the bar is well-suited for applications needing high strength and resistance to wear.

Sort by

Relevance
  • Relevance
  • Size
  • Price:Low to High
  • Product Name: A to Z
  • Product Name: Z to A
  • Price:High to Low

Close

Refine Your Results

Clear Search

Filters

Temper

Production Method

seller

Material

Shape

SALE! Save BIG on end of Year Deals!

5/8" Alloy Steel Hex Bar 4340 Cold Finished, Normalized & Tempered - 
Part #: 27781

5/8" Alloy Steel Hex Bar 4340 Cold Finished, Normalized & Tempered -
Part #: 27781

Click for more details

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

Dimensions

  • Across Flats: 0.625"
See all available dimensions for this product
  • 12″ (1 ft.) - $20.42 ea.
  • 24″ (2 ft.) - $39.75 ea.
  • 36″ (3 ft.) - $54.24 ea.

    Buy 4 at the 12 ft price!

  • 48″ (4 ft.) - $67.65 ea.
  • 72″ (6 ft.) - $95.52 ea.
  • 96″ (8 ft.) - $118.98 ea.
  • 144″ (12 ft.) - $148.12 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

$20.42 ea.
$20.42 for 1

1/2" Alloy Steel Hex Bar 4340 Cold Finished, Normalized & Tempered - 
Part #: 27933

1/2" Alloy Steel Hex Bar 4340 Cold Finished, Normalized & Tempered -
Part #: 27933

Click for more details

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

Dimensions

  • Across Flats: 0.5"
See all available dimensions for this product
  • 12″ (1 ft.) - $12.98 ea.
  • 24″ (2 ft.) - $25.28 ea.
  • 36″ (3 ft.) - $34.50 ea.

    Buy 4 at the 12 ft price!

  • 48″ (4 ft.) - $43.02 ea.
  • 72″ (6 ft.) - $60.75 ea.
  • 96″ (8 ft.) - $75.67 ea.
  • 144″ (12 ft.) - $94.20 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

$12.98 ea.
$12.98 for 1

1/2" Alloy Steel Hex Bar 4340-Normalized - 
Part #: 13587

1/2" Alloy Steel Hex Bar 4340-Normalized -
Part #: 13587

Click for more details

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

Dimensions

  • Across Flats: 0.5"
See all available dimensions for this product
  • 12″ (1 ft.) - $17.87 ea.
  • 24″ (2 ft.) - $34.80 ea.
  • 36″ (3 ft.) - $47.48 ea.

    Buy 4 at the 12 ft price!

  • 48″ (4 ft.) - $59.22 ea.
  • 72″ (6 ft.) - $83.64 ea.
  • 96″ (8 ft.) - $104.17 ea.
  • 144″ (12 ft.) - $129.67 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

$17.87 ea.
$17.87 for 1

Can't find what you're looking for?

Contact us for a custom quote