Shop all Products

Aluminum
Stainless Steel
Steel
Copper
Brass
Bronze
Nickel
Titanium
Other Metals
Other Raw Materials
Manufacturing Accessories
Finishing Products

888-527-3331 or LiveChat

Get a Quick Quote!

Deals

Get a Quick Quote!

Home
Long Products
Rectangle Flat Bar
Alloy Steel
Alloy Steel Rectangle Bar
4340
Alloy Steel Rectangle Bar 4340

Alloy Steel Rectangle Bar 4340

-15 Products

Alloy Steel 4340 Product Guide

| Alloy Steel 4340 Rectangle Bar Tolerances

Alloy Steel 4340 Flat Bar is normally used for aerospace, heavy-duty industrial, and automotive applications. 4340 steel stock has high strength, toughness, wear resistance, and fatigue strength. It can be machined in all states other than hardened and it is easily welded. 4340 flat bar stock is available in full size. Please contact sales@onlinemetals.com for a quote in a custom size.

Sort by

Displaying 1 - 15 of 15 results

25 Per Page

25 Per Page
50 Per Page
100 Per Page

Size

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

Sort by

Displaying 1 - 15 of 15 results

25 Per Page

25 Per Page
50 Per Page
100 Per Page

Refine Your Results

Select Material

Select Shape

Select Alloy

Clear Search

Filters

Material

Alloy Steel

Shape

Bar-Rectangle

Alloy/Type

4340

Temper

N&T

Normalized

Normalized & Tempered

Production Method

Cold Drawn

Hot Rolled

Unit of Measure

inch

seller

Onlinemetals.com

%7B%22item_id%22%3A%2225678%22%2C%22item_name%22%3A%220.25%5C%22+x+2%5C%22+Alloy+Steel+Rectangle+Bar+4340+Cold+Drawn%22%2C%22item_brand%22%3A%22%22%2C%22item_category%22%3A%22Alloy+Steel%22%2C%22item_category2%22%3A%22Bar-Rectangle%22%2C%22item_category3%22%3A%224340%22%2C%22item_category4%22%3A%22Normalized%22%2C%22item_category5%22%3A%22Cold+Drawn%22%2C%22item_category6%22%3A%22%2F%22%2C%22item_category7%22%3A%22%22%2C%22item_category8%22%3A%22false%22%2C%22item_category9%22%3A%22false%22%2C%22item_list_id%22%3A%22%22%2C%22item_list_name%22%3A%22%22%2C%22item_variant%22%3A%22%22%2C%22price%22%3A%22%22%2C%22quantity%22%3A%22%22%7D

0.25" x 2" Alloy Steel Rectangle Bar 4340 Cold Drawn -
Part #: 25678

0.25" x 2" Alloy Steel Rectangle Bar 4340 Cold Drawn -

Part #: 25678

Click for more details

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

Compare

Dimensions

Thickness: 0.25"
Width: 2"

See all available dimensions for this product

Select a Cut Size for Price Select a Cut Size

12″ (1 ft.) - $41.08 ea.
24″ (2 ft.) - $79.92 ea.
36″ (3 ft.) - $109.08 ea.
Buy 4 at the 12 ft price!
44″ (44 in.) - $125.07 ea.
Order to avoid UPS additional handling fees
48″ (4 ft.) - $136.01 ea.
72″ (6 ft.) - $192.11 ea.
96″ (8 ft.) - $239.26 ea.

Save on shipping!

You can select smaller lengths and switch from freight to standard shipping and save!

How does selecting smaller lengths reduce shipping costs?

Reducing your order from an oversize item that requires expensive freight services to a smaller bundle makes it eligible for less expensive (and faster!) standard shipping services.

*Material tolerances will remain +/- 0.125".

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

$41.08 ea.

$41.08 for 1

SALE! 30% off on 24" Length

%7B%22item_id%22%3A%2225679%22%2C%22item_name%22%3A%220.5%5C%22+x+2%5C%22+Alloy+Steel+Rectangle+Bar+4340+Cold+Drawn%22%2C%22item_brand%22%3A%22%22%2C%22item_category%22%3A%22Alloy+Steel%22%2C%22item_category2%22%3A%22Bar-Rectangle%22%2C%22item_category3%22%3A%224340%22%2C%22item_category4%22%3A%22Normalized%22%2C%22item_category5%22%3A%22Cold+Drawn%22%2C%22item_category6%22%3A%22%2F%22%2C%22item_category7%22%3A%22%22%2C%22item_category8%22%3A%22false%22%2C%22item_category9%22%3A%22false%22%2C%22item_list_id%22%3A%22%22%2C%22item_list_name%22%3A%22%22%2C%22item_variant%22%3A%22%22%2C%22price%22%3A%22%22%2C%22quantity%22%3A%22%22%7D

0.5" x 2" Alloy Steel Rectangle Bar 4340 Cold Drawn -
Part #: 25679

0.5" x 2" Alloy Steel Rectangle Bar 4340 Cold Drawn -

Part #: 25679

Click for more details

Compare

Dimensions

Thickness: 0.5"
Width: 2"

See all available dimensions for this product

Select a Cut Size for Price Select a Cut Size

12″ (1 ft.) - $85.86 ea.
24″ (2 ft.) - $116.94 ea.
36″ (3 ft.) - $228.04 ea.
Buy 4 at the 12 ft price!
44″ (44 in.) - $261.66 ea.
Order to avoid UPS additional handling fees
48″ (4 ft.) - $284.33 ea.
72″ (6 ft.) - $401.58 ea.
96″ (8 ft.) - $500.17 ea.
144″ (12 ft.) - $622.60 ea.

Save on shipping!

You can select smaller lengths and switch from freight to standard shipping and save!

How does selecting smaller lengths reduce shipping costs?

Best shipping value:

Single Heat Lot Required

Why are heat lots important?

QTY

$85.86 ea.

$85.86 for 1

0.5" x 3" Alloy Steel Rectangle Bar 4340 Normalized, Tempered, and Cold Drawn -
Part #: 28842

0.5" x 3" Alloy Steel Rectangle Bar 4340 Normalized, Tempered, and Cold Drawn-

Part #: 28842

Click for more details

Dimensions

Thickness: 0.5"
Width: 3"

See all available dimensions for this product

Pricing and availability for this item changes frequently. Contact us now for a fast quote.

0.75" x 2" Alloy Steel Rectangle Bar 4340 -
Part #: 23150

0.75" x 2" Alloy Steel Rectangle Bar 4340-

Part #: 23150

Click for more details

Dimensions

Thickness: 0.75"
Width: 2"

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

%7B%22item_id%22%3A%2212788%22%2C%22item_name%22%3A%220.75%5C%22+x+1%5C%22+Alloy+Steel+Rectangle+Bar+4340%22%2C%22item_brand%22%3A%22%22%2C%22item_category%22%3A%22Alloy+Steel%22%2C%22item_category2%22%3A%22Bar-Rectangle%22%2C%22item_category3%22%3A%224340%22%2C%22item_category4%22%3A%22%22%2C%22item_category5%22%3A%22%22%2C%22item_category6%22%3A%22%2F%22%2C%22item_category7%22%3A%22%22%2C%22item_category8%22%3A%22false%22%2C%22item_category9%22%3A%22true%22%2C%22item_list_id%22%3A%22%22%2C%22item_list_name%22%3A%22%22%2C%22item_variant%22%3A%22%22%2C%22price%22%3A%22%22%2C%22quantity%22%3A%22%22%7D

0.75" x 1" Alloy Steel Rectangle Bar 4340 -
Part #: 12788

0.75" x 1" Alloy Steel Rectangle Bar 4340 -

Part #: 12788

Click for more details

Compare

Dimensions

Thickness: 0.75"
Width: 1"

See all available dimensions for this product

Select a Cut Size for Price Select a Cut Size

12″ (1 ft.) - $160.07 ea.
24″ (2 ft.) - $218.01 ea.
36″ (3 ft.) - $425.08 ea.
Buy 4 at the 12 ft price!
44″ (44 in.) - $487.46 ea.
Order to avoid UPS additional handling fees
48″ (4 ft.) - $530.05 ea.
72″ (6 ft.) - $748.64 ea.
84″ (7 ft.) - $447.58 ea.
96″ (8 ft.) - $932.40 ea.

Save on shipping!

You can select smaller lengths and switch from freight to standard shipping and save!

How does selecting smaller lengths reduce shipping costs?

Best shipping value:

Single Heat Lot Required

Why are heat lots important?

Create Custom Cut

QTY

$160.07 ea.

$160.07 for 1

0.75" x 1.5" Alloy Steel Rectangle Bar 4340 -
Part #: 26418

0.75" x 1.5" Alloy Steel Rectangle Bar 4340-

Part #: 26418

Click for more details

Dimensions

Thickness: 0.75"
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.

%7B%22item_id%22%3A%2225673%22%2C%22item_name%22%3A%221%5C%22+x+2%5C%22+Alloy+Steel+Rectangle+Bar+4340+Cold+Drawn%22%2C%22item_brand%22%3A%22%22%2C%22item_category%22%3A%22Alloy+Steel%22%2C%22item_category2%22%3A%22Bar-Rectangle%22%2C%22item_category3%22%3A%224340%22%2C%22item_category4%22%3A%22%22%2C%22item_category5%22%3A%22Cold+Drawn%22%2C%22item_category6%22%3A%22%2F%22%2C%22item_category7%22%3A%22%22%2C%22item_category8%22%3A%22false%22%2C%22item_category9%22%3A%22false%22%2C%22item_list_id%22%3A%22%22%2C%22item_list_name%22%3A%22%22%2C%22item_variant%22%3A%22%22%2C%22price%22%3A%22%22%2C%22quantity%22%3A%22%22%7D

1" x 2" Alloy Steel Rectangle Bar 4340 Cold Drawn -
Part #: 25673

1" x 2" Alloy Steel Rectangle Bar 4340 Cold Drawn -

Part #: 25673

Click for more details

Compare

Dimensions

Thickness: 1"
Width: 2"

See all available dimensions for this product

Select a Cut Size for Price Select a Cut Size

12″ (1 ft.) - $149.02 ea.
24″ (2 ft.) - $289.90 ea.
36″ (3 ft.) - $395.70 ea.
Buy 4 at the 12 ft price!
44″ (44 in.) - $453.86 ea.
Order to avoid UPS additional handling fees
48″ (4 ft.) - $493.36 ea.
72″ (6 ft.) - $696.86 ea.
96″ (8 ft.) - $867.91 ea.
144″ (12 ft.) - $1,080.38 ea.

Save on shipping!

You can select smaller lengths and switch from freight to standard shipping and save!

How does selecting smaller lengths reduce shipping costs?

Best shipping value:

Single Heat Lot Required

Why are heat lots important?

QTY

$149.02 ea.

$149.02 for 1

1" x 2.5" Alloy Steel Rectangle Bar 4340 Normalized, Tempered, and Cold Drawn -
Part #: 28207

1" x 2.5" Alloy Steel Rectangle Bar 4340 Normalized, Tempered, and Cold Drawn-

Part #: 28207

Click for more details

Dimensions

Thickness: 1"
Width: 2.5"

See all available dimensions for this product

Pricing and availability for this item changes frequently. Contact us now for a fast quote.

1.25" x 4" Alloy Steel Rectangle Bar 4340 -
Part #: 27859

1.25" x 4" Alloy Steel Rectangle Bar 4340-

Part #: 27859

Click for more details

Dimensions

Thickness: 1.25"
Width: 4"

See all available dimensions for this product

Pricing and availability for this item changes frequently. Contact us now for a fast quote.

1.5" x 3" Alloy Steel Rectangle Bar 4340 Normalized, Tempered, and Cold Drawn -
Part #: 28810

1.5" x 3" Alloy Steel Rectangle Bar 4340 Normalized, Tempered, and Cold Drawn-

Part #: 28810

Click for more details

Dimensions

Thickness: 1.5"
Width: 3"

See all available dimensions for this product

Pricing and availability for this item changes frequently. Contact us now for a fast quote.

1.75" x 3" Alloy Steel Rectangle Bar 4340 -
Part #: 23157

1.75" x 3" Alloy Steel Rectangle Bar 4340-

Part #: 23157

Click for more details

Dimensions

Thickness: 1.75"
Width: 3"

See all available dimensions for this product

Pricing and availability for this item changes frequently. Contact us now for a fast quote.

%7B%22item_id%22%3A%2225681%22%2C%22item_name%22%3A%222%5C%22+x+6%5C%22+Alloy+Steel+Rectangle+Bar+4340+Hot+Rolled%22%2C%22item_brand%22%3A%22%22%2C%22item_category%22%3A%22Alloy+Steel%22%2C%22item_category2%22%3A%22Bar-Rectangle%22%2C%22item_category3%22%3A%224340%22%2C%22item_category4%22%3A%22Normalized%22%2C%22item_category5%22%3A%22Hot+Rolled%22%2C%22item_category6%22%3A%22%2F%22%2C%22item_category7%22%3A%22%22%2C%22item_category8%22%3A%22false%22%2C%22item_category9%22%3A%22false%22%2C%22item_list_id%22%3A%22%22%2C%22item_list_name%22%3A%22%22%2C%22item_variant%22%3A%22%22%2C%22price%22%3A%22%22%2C%22quantity%22%3A%22%22%7D

2" x 6" Alloy Steel Rectangle Bar 4340 Hot Rolled -
Part #: 25681

2" x 6" Alloy Steel Rectangle Bar 4340 Hot Rolled -

Part #: 25681

Click for more details

Compare

Dimensions

Thickness: 2"
Width: 6"

See all available dimensions for this product

Select a Cut Size for Price Select a Cut Size

12″ (1 ft.) - $440.54 ea.
44″ (44 in.) - $1,467.42 ea.
Order to avoid UPS additional handling fees
48″ (4 ft.) - $1,594.34 ea.

Save on shipping!

You can select smaller lengths and switch from freight to standard shipping and save!

How does selecting smaller lengths reduce shipping costs?

Best shipping value:

Single Heat Lot Required

Why are heat lots important?

QTY

$440.54 ea.

$440.54 for 1

%7B%22item_id%22%3A%2225393%22%2C%22item_name%22%3A%222.5%5C%22+x+3%5C%22+Alloy+Steel+Rectangle+Bar+4340%22%2C%22item_brand%22%3A%22%22%2C%22item_category%22%3A%22Alloy+Steel%22%2C%22item_category2%22%3A%22Bar-Rectangle%22%2C%22item_category3%22%3A%224340%22%2C%22item_category4%22%3A%22N%26T%22%2C%22item_category5%22%3A%22%22%2C%22item_category6%22%3A%22%2F%22%2C%22item_category7%22%3A%22%22%2C%22item_category8%22%3A%22false%22%2C%22item_category9%22%3A%22false%22%2C%22item_list_id%22%3A%22%22%2C%22item_list_name%22%3A%22%22%2C%22item_variant%22%3A%22%22%2C%22price%22%3A%22%22%2C%22quantity%22%3A%22%22%7D

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

2.5" x 3" Alloy Steel Rectangle Bar 4340 -

Part #: 25393

Click for more details

Compare

Dimensions

Thickness: 2.5"
Width: 3"

See all available dimensions for this product

Select a Cut Size for Price Select a Cut Size

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.

Save on shipping!

You can select smaller lengths and switch from freight to standard shipping and save!

How does selecting smaller lengths reduce shipping costs?

Best shipping value:

Single Heat Lot Required

Why are heat lots important?

QTY

$352.39 ea.

$352.39 for 1

%7B%22item_id%22%3A%2225682%22%2C%22item_name%22%3A%223%5C%22+x+6%5C%22+Alloy+Steel+Rectangle+Bar+4340+Hot+Rolled%22%2C%22item_brand%22%3A%22%22%2C%22item_category%22%3A%22Alloy+Steel%22%2C%22item_category2%22%3A%22Bar-Rectangle%22%2C%22item_category3%22%3A%224340%22%2C%22item_category4%22%3A%22Normalized%22%2C%22item_category5%22%3A%22Hot+Rolled%22%2C%22item_category6%22%3A%22%2F%22%2C%22item_category7%22%3A%22%22%2C%22item_category8%22%3A%22false%22%2C%22item_category9%22%3A%22false%22%2C%22item_list_id%22%3A%22%22%2C%22item_list_name%22%3A%22%22%2C%22item_variant%22%3A%22%22%2C%22price%22%3A%22%22%2C%22quantity%22%3A%22%22%7D

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

3" x 6" Alloy Steel Rectangle Bar 4340 Hot Rolled -

Part #: 25682

Click for more details

Compare

Dimensions

Thickness: 3"
Width: 6"

See all available dimensions for this product

Select a Cut Size for Price Select a Cut Size

12″ (1 ft.) - $1,076.41 ea.

Save on shipping!

You can select smaller lengths and switch from freight to standard shipping and save!

How does selecting smaller lengths reduce shipping costs?

Best shipping value:

Single Heat Lot Required

Why are heat lots important?

QTY

$1,076.41 ea.

$1,076.41 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

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.

Can't find what you're looking for?

You Have Added QTY to Your Cart

Product Name Part #

Dimensions

Size:

Go To Cart Continue shopping

Discounted shipping and material on all carts over $1000. Call Us or Click Here for a quote!

888-527-3331 or LiveChat

Alloy Steel Rectangle Bar 4340

-15 Products

Sort by

Displaying 1 - 15 of 15 results

Sort by

Displaying 1 - 15 of 15 results

Filters

Material

Shape

Alloy/Type

Temper

Production Method

Unit of Measure

seller

Part #: 25678

QTY

Part #: 25679

QTY

Part #: 28842

Part #: 23150

Part #: 12788

QTY

Part #: 26418

Part #: 25673

QTY

Part #: 28207

Part #: 27859

Part #: 28810

Part #: 23157

Part #: 25681

QTY

Part #: 25393

QTY

Part #: 25682

QTY

Part #: 25683

Can't find what you're looking for?