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321 Stainless Steel

-112 Products

321 Product Guide Product   | 321 Stainless Steel Tolerance Guide product

Reinforced with titanium, 321 stainless steel excels in high temperature environments, providing resistance to cracking and corrosion. Additionally, 321 stainless resists scaling at higher temperatures. The addition of titanium means that welding is not suggested for this alloy. Typically used in aircraft engines, expansion joints, thermal equipment, refinery equipment, and high temperature chemical processing equipment. In the automotive industry 321 is used for headers and exhaust systems.

 

We carry 321 in hex bar, cold finish hex bar, rectangle bar, annealed rectangle bar, round bar, round tube, seamless round tube, and sheet/plate.

 

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

 

Relevant Knowledge Hub Resources: 5 Reasons to Cut to Size | The Weldability of Stainless Steel

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1/205" Stainless Round Bar 321 - 
Part #: mp-00041817

1/205" Stainless Round Bar 321 -
Part #: mp-00041817

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Dimensions

  • Diameter: 0.505"
See all available dimensions for this product
  • 6″ (6 in.) - $168.25 ea.
  • 12″ (1 ft.) - $172.94 ea.
  • 24″ (2 ft.) - $172.01 ea.
  • 36″ (3 ft.) - $177.51 ea.
  • 48″ (4 ft.) - $182.81 ea.
  • 72″ (6 ft.) - $199.87 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

$168.25 ea.
$168.25 for 1
Sold and shipped by Slice of Stainless

9/16" Stainless Round Bar 321 - 
Part #: mp-00041861

9/16" Stainless Round Bar 321 -
Part #: mp-00041861

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Dimensions

  • Diameter: 0.5625"
See all available dimensions for this product
  • 6″ (6 in.) - $169.10 ea.
  • 12″ (1 ft.) - $174.64 ea.
  • 24″ (2 ft.) - $175.20 ea.
  • 36″ (3 ft.) - $182.22 ea.
  • 48″ (4 ft.) - $188.98 ea.
  • 72″ (6 ft.) - $209.12 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.

QTY

$169.10 ea.
$169.10 for 1
Sold and shipped by Slice of Stainless

0.625" Stainless Plate 321 - 
Part #: 14666

0.625" Stainless Plate 321 -
Part #: 14666

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Dimensions

  • Thickness: 0.625"
See all available dimensions for this product
  • 12″ X 12″ (1 X 1 ft.) - $735.35 ea.
  • 12″ X 24″ (1 X 2 ft.) - $1,395.01 ea.
  • 12″ X 36″ (1 X 3 ft.) - $2,060.07 ea.
  • 12″ X 48″ (1 X 4 ft.) - $2,671.06 ea.
  • 24″ X 24″ (2 X 2 ft.) - $2,671.06 ea.
  • 24″ X 36″ (2 X 3 ft.) - $3,828.18 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

$735.35 ea.
$735.35 for 1

5/8" Stainless Round Bar 321 - 
Part #: 17902

5/8" Stainless Round Bar 321 -
Part #: 17902

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Dimensions

  • Diameter: 0.625"
See all available dimensions for this product
  • 12″ (1 ft.) - $25.59 ea.
  • 24″ (2 ft.) - $49.78 ea.
  • 36″ (3 ft.) - $67.92 ea.

    Buy 4 at the 12 ft price!

  • 44″ (44 in.) - $77.94 ea.

    Order to avoid UPS additional handling fees

  • 48″ (4 ft.) - $84.69 ea.
  • 72″ (6 ft.) - $119.63 ea.
  • 96″ (8 ft.) - $148.99 ea.
  • 144″ (12 ft.) - $185.48 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

$25.59 ea.
$25.59 for 1

11/16" Stainless Round Bar 321 Cold Finish - 
Part #: 18435

11/16" Stainless Round Bar 321 Cold Finish -
Part #: 18435

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stainless-round-bar-321-cold-finish-1superZoom

Dimensions

  • Diameter: 0.6875"
See all available dimensions for this product
  • 12″ (1 ft.) - $40.48 ea.
  • 24″ (2 ft.) - $78.76 ea.
  • 36″ (3 ft.) - $107.50 ea.

    Buy 4 at the 12 ft price!

  • 44″ (44 in.) - $123.31 ea.

    Order to avoid UPS additional handling fees

  • 48″ (4 ft.) - $134.04 ea.
  • 72″ (6 ft.) - $189.32 ea.
  • 96″ (8 ft.) - $235.77 ea.
  • 144″ (12 ft.) - $293.50 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

$40.48 ea.
$40.48 for 1

0.75" Stainless Plate 321 - 
Part #: 20156

0.75" Stainless Plate 321-
Part #: 20156

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Dimensions

  • Thickness: 0.75"
See all available dimensions for this product
Pricing and availability for this item changes frequently. Contact us now for a fast quote.

3/4" Stainless Round Bar 321 - 
Part #: mp-00041733

3/4" Stainless Round Bar 321 -
Part #: mp-00041733

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Dimensions

  • Diameter: 0.75"
See all available dimensions for this product
  • 6″ (6 in.) - $172.92 ea.
  • 12″ (1 ft.) - $182.29 ea.
  • 24″ (2 ft.) - $189.63 ea.
  • 36″ (3 ft.) - $203.46 ea.
  • 48″ (4 ft.) - $216.78 ea.
  • 72″ (6 ft.) - $250.83 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

$172.92 ea.
$172.92 for 1
Sold and shipped by Slice of Stainless

13/16" Stainless Round Bar 321 - 
Part #: mp-00041760

13/16" Stainless Round Bar 321 -
Part #: mp-00041760

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Dimensions

  • Diameter: 0.8125"
See all available dimensions for this product
  • 6″ (6 in.) - $174.55 ea.
  • 12″ (1 ft.) - $185.54 ea.
  • 24″ (2 ft.) - $195.77 ea.
  • 36″ (3 ft.) - $212.49 ea.
  • 48″ (4 ft.) - $228.60 ea.
  • 72″ (6 ft.) - $268.56 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.

QTY

$174.55 ea.
$174.55 for 1
Sold and shipped by Slice of Stainless

7/8" Stainless Round Bar 321 - 
Part #: mp-00041724

7/8" Stainless Round Bar 321 -
Part #: mp-00041724

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Dimensions

  • Diameter: 0.875"
See all available dimensions for this product
  • 6″ (6 in.) - $176.30 ea.
  • 12″ (1 ft.) - $189.05 ea.
  • 24″ (2 ft.) - $202.39 ea.
  • 36″ (3 ft.) - $222.24 ea.
  • 48″ (4 ft.) - $241.37 ea.
  • 72″ (6 ft.) - $287.71 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

$176.30 ea.
$176.30 for 1
Sold and shipped by Slice of Stainless

15/16" Stainless Round Bar 321 Cold Finish - 
Part #: 18439

15/16" Stainless Round Bar 321 Cold Finish -
Part #: 18439

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stainless-round-bar-321-cold-finish-1superZoom

Dimensions

  • Diameter: 0.9375"
See all available dimensions for this product
  • 12″ (1 ft.) - $53.29 ea.
  • 24″ (2 ft.) - $103.72 ea.
  • 36″ (3 ft.) - $141.55 ea.

    Buy 4 at the 12 ft price!

  • 44″ (44 in.) - $162.39 ea.

    Order to avoid UPS additional handling fees

  • 48″ (4 ft.) - $176.51 ea.
  • 72″ (6 ft.) - $249.28 ea.
  • 96″ (8 ft.) - $310.48 ea.
  • 144″ (12 ft.) - $386.50 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

$53.29 ea.
$53.29 for 1

1" Stainless Hex Bar 321 Cold Finish - 
Part #: 18424

1" Stainless Hex Bar 321 Cold Finish -
Part #: 18424

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stainless-hex-bar-321-cold-finish-1superZoom

Dimensions

  • Across Flats: 1"
See all available dimensions for this product
  • 12″ (1 ft.) - $100.33 ea.
  • 24″ (2 ft.) - $195.20 ea.
  • 36″ (3 ft.) - $266.42 ea.

    Buy 4 at the 12 ft price!

  • 44″ (44 in.) - $305.72 ea.

    Order to avoid UPS additional handling fees

  • 48″ (4 ft.) - $332.20 ea.
  • 72″ (6 ft.) - $469.20 ea.
  • 96″ (8 ft.) - $584.40 ea.
  • 144″ (12 ft.) - $727.46 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

$100.33 ea.
$100.33 for 1

1" Stainless Plate 321 - 
Part #: 27566

1" Stainless Plate 321-
Part #: 27566

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Dimensions

  • Thickness: 1"
See all available dimensions for this product
Pricing and availability for this item changes frequently. Contact us now for a fast quote.

1" OD x 0.028" Wall x 0.944" ID Stainless Round Tube 321 Seamless - 
Part #: 28434

1" OD x 0.028" Wall x 0.944" ID Stainless Round Tube 321 Seamless-
Part #: 28434

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Placeholder for future product image

Dimensions

  • Outer Diameter: 1"
  • Wall: 0.028"
  • Inner Diameter: 0.944"
See all available dimensions for this product
Pricing and availability for this item changes frequently. Contact us now for a fast quote.

1" Stainless Round Bar 321 - 
Part #: mp-00041830

1" Stainless Round Bar 321 -
Part #: mp-00041830

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Dimensions

  • Diameter: 1"
See all available dimensions for this product
  • 6″ (6 in.) - $179.34 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.

QTY

$179.34 ea.
$179.34 for 1
Sold and shipped by Slice of Stainless

1 1/18" Stainless Hex Bar 321 Cold Finish - 
Part #: 18425

1 1/18" Stainless Hex Bar 321 Cold Finish -
Part #: 18425

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stainless-hex-bar-321-cold-finish-1superZoom

Dimensions

  • Across Flats: 1.125"
See all available dimensions for this product
  • 12″ (1 ft.) - $64.81 ea.
  • 24″ (2 ft.) - $126.13 ea.
  • 36″ (3 ft.) - $172.14 ea.

    Buy 4 at the 12 ft price!

  • 44″ (44 in.) - $197.48 ea.

    Order to avoid UPS additional handling fees

  • 48″ (4 ft.) - $214.62 ea.
  • 72″ (6 ft.) - $303.15 ea.
  • 96″ (8 ft.) - $377.57 ea.
  • 144″ (12 ft.) - $470.00 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

$64.81 ea.
$64.81 for 1

1 1/8" Stainless Round Bar 321 - 
Part #: mp-00041774

1 1/8" Stainless Round Bar 321 -
Part #: mp-00041774

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Dimensions

  • Diameter: 1.125"
See all available dimensions for this product
  • 6″ (6 in.) - $185.75 ea.
  • 12″ (1 ft.) - $205.73 ea.
  • 24″ (2 ft.) - $231.77 ea.
  • 36″ (3 ft.) - $264.47 ea.
  • 48″ (4 ft.) - $295.98 ea.
  • 72″ (6 ft.) - $368.62 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.

QTY

$185.75 ea.
$185.75 for 1
Sold and shipped by Slice of Stainless

1 1/4" Stainless Round Bar 321 - 
Part #: 18440

1 1/4" Stainless Round Bar 321 -
Part #: 18440

Click for more details

stainless-round-bar-321-cold-finish-1superZoom

Dimensions

  • Diameter: 1.25"
See all available dimensions for this product
  • 12″ (1 ft.) - $118.43 ea.
  • 24″ (2 ft.) - $230.46 ea.
  • 36″ (3 ft.) - $314.54 ea.

    Buy 4 at the 12 ft price!

  • 44″ (44 in.) - $360.83 ea.

    Order to avoid UPS additional handling fees

  • 48″ (4 ft.) - $392.20 ea.
  • 72″ (6 ft.) - $553.93 ea.
  • 96″ (8 ft.) - $689.91 ea.
  • 144″ (12 ft.) - $858.82 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

$118.43 ea.
$118.43 for 1

1.25" Stainless Plate 321 - 
Part #: 21183

1.25" Stainless Plate 321-
Part #: 21183

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stainless-plate-316-annealed-hrap-1superZoom

Dimensions

  • Thickness: 1.25"
See all available dimensions for this product
Pricing and availability for this item changes frequently. Contact us now for a fast quote.

1 3/8" Stainless Round Bar 321 Cold Finish - 
Part #: 18441

1 3/8" Stainless Round Bar 321 Cold Finish -
Part #: 18441

Click for more details

stainless-round-bar-321-cold-finish-1superZoom

Dimensions

  • Diameter: 1.375"
See all available dimensions for this product
  • 12″ (1 ft.) - $134.49 ea.
  • 24″ (2 ft.) - $261.69 ea.
  • 36″ (3 ft.) - $357.17 ea.

    Buy 4 at the 12 ft price!

  • 44″ (44 in.) - $409.64 ea.

    Order to avoid UPS additional handling fees

  • 48″ (4 ft.) - $445.33 ea.
  • 72″ (6 ft.) - $629.00 ea.
  • 96″ (8 ft.) - $783.42 ea.
  • 144″ (12 ft.) - $975.20 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

$134.49 ea.
$134.49 for 1

1 1/2" Stainless Round Bar 321-Annealed - 
Part #: 12884

1 1/2" Stainless Round Bar 321-Annealed -
Part #: 12884

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stainless-round-bar-321-cold-finish-1superZoom

Dimensions

  • Diameter: 1.5"
See all available dimensions for this product
  • 12″ (1 ft.) - $171.82 ea.
  • 24″ (2 ft.) - $334.30 ea.
  • 36″ (3 ft.) - $456.29 ea.

    Buy 4 at the 12 ft price!

  • 44″ (44 in.) - $523.33 ea.

    Order to avoid UPS additional handling fees

  • 48″ (4 ft.) - $568.93 ea.
  • 72″ (6 ft.) - $803.54 ea.
  • 96″ (8 ft.) - $1,000.80 ea.
  • 144″ (12 ft.) - $1,245.82 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

$171.82 ea.
$171.82 for 1

1 1/2" Stainless Hex Bar 321 Cold Finish - 
Part #: 18428

1 1/2" Stainless Hex Bar 321 Cold Finish -
Part #: 18428

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stainless-hex-bar-321-cold-finish-1superZoom

Dimensions

  • Across Flats: 1.5"
See all available dimensions for this product
  • 12″ (1 ft.) - $214.69 ea.
  • 24″ (2 ft.) - $417.67 ea.
  • 36″ (3 ft.) - $570.09 ea.

    Buy 4 at the 12 ft price!

  • 44″ (44 in.) - $653.89 ea.

    Order to avoid UPS additional handling fees

  • 48″ (4 ft.) - $710.84 ea.
  • 72″ (6 ft.) - $1,003.98 ea.
  • 96″ (8 ft.) - $1,250.43 ea.
  • 144″ (12 ft.) - $1,556.56 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

$214.69 ea.
$214.69 for 1

1 1/2" OD x 0.035" Wall x 1.43" ID Stainless Round Tube 321 Seamless - 
Part #: 27715

1 1/2" OD x 0.035" Wall x 1.43" ID Stainless Round Tube 321 Seamless-
Part #: 27715

Click for more details

stainless-round-tube-316-seamless-1superZoom

Dimensions

  • Outer Diameter: 1.5"
  • Wall: 0.035"
  • Inner Diameter: 1.43"
See all available dimensions for this product
Pricing and availability for this item changes frequently. Contact us now for a fast quote.

1.5" Stainless Plate 321 - 
Part #: 28478

1.5" Stainless Plate 321-
Part #: 28478

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Placeholder for future product image

Dimensions

  • Thickness: 1.5"
See all available dimensions for this product
Pricing and availability for this item changes frequently. Contact us now for a fast quote.

1.5" OD x 0.065" Wall x 1.37" ID 321 Stainless Steel Round Tube Welded-#8 Mirror Polished - 
Part #: mp-00038235

1.5" OD x 0.065" Wall x 1.37" ID 321 Stainless Steel Round Tube Welded-#8 Mirror Polished -
Part #: mp-00038235

Click for more details

Dimensions

  • Outer Diameter: 1.5"
  • Wall: 0.065"
  • Inner Diameter: 1.37"
  • Ships In: 1-3 Business Days
See all available dimensions for this product
  • 60″ (5 ft.) - $362.95 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

$362.95 ea.
$362.95 for 1
Sold and shipped by Stainless Headers Mfg.

1.5" OD x 0.035" Wall x 1.43" ID 321 Stainless Steel Round Tube Welded-#4 Brushed Finish - 
Part #: mp-00038243

1.5" OD x 0.035" Wall x 1.43" ID 321 Stainless Steel Round Tube Welded-#4 Brushed Finish -
Part #: mp-00038243

Click for more details

Dimensions

  • Outer Diameter: 1.5"
  • Wall: 0.035"
  • Inner Diameter: 1.43"
  • Ships In: 1-3 Business Days
See all available dimensions for this product
  • 24″ (2 ft.) - $225.95 ea.
  • 48″ (4 ft.) - $453.95 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

$225.95 ea.
$225.95 for 1
Sold and shipped by Stainless Headers Mfg.
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