Shop all Products
Explore OLM Rewards

Open for Orders 24/7!

Deals
Get a Quick Quote!
round-tube-large-new-min-4superZoom

Stainless Steel Round Tube 321

-49 Products

Stainless Steel 321 Product 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.

 We offer 321 stainless steel tubing in seamless.

 

Relevant Knowledge Hub Resources: Understanding Steel | The Weldability of Stainless Steel

Automotive Icon Automotive Store
alt text here

Sort by

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

Close

Refine Your Results

Clear Search

Filters

Temper

Production Method

Finish

seller

Material

Shape

Online Metals #1 in Freight Shipping!

3/8" OD x 0.095" Wall x 0.185" ID Stainless Round Tube 321 Seamless - 
Part #: 23519

3/8" OD x 0.095" Wall x 0.185" ID Stainless Round Tube 321 Seamless-
Part #: 23519

Click for more details

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

Dimensions

  • Outer Diameter: 0.375"
  • Wall: 0.095"
  • Inner Diameter: 0.185"
See all available dimensions for this product
Pricing and availability for this item changes frequently. Contact us now for a fast quote.

3/8" OD x 0.035" Wall x 0.305" ID Stainless Round Tube 321 Seamless - 
Part #: 28171

3/8" OD x 0.035" Wall x 0.305" ID Stainless Round Tube 321 Seamless-
Part #: 28171

Click for more details

Placeholder for future product image

Dimensions

  • Outer Diameter: 0.375"
  • Wall: 0.035"
  • Inner Diameter: 0.305"
See all available dimensions for this product
Pricing and availability for this item changes frequently. Contact us now for a fast quote.

1/2" OD x 0.035" Wall x 0.43" ID Stainless Round Tube 321 Seamless - 
Part #: 28172

1/2" OD x 0.035" Wall x 0.43" ID Stainless Round Tube 321 Seamless-
Part #: 28172

Click for more details

Placeholder for future product image

Dimensions

  • Outer Diameter: 0.5"
  • Wall: 0.035"
  • Inner Diameter: 0.43"
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

Click for more details

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 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" 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.

1.5" OD x 0.065" Wall x 1.37" ID 321 Stainless Steel Round Tube Welded-#4 Brushed Finish - 
Part #: mp-00038295

1.5" OD x 0.065" Wall x 1.37" ID 321 Stainless Steel Round Tube Welded-#4 Brushed Finish -
Part #: mp-00038295

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
  • 24″ (2 ft.) - $85.95 ea.
  • 60″ (5 ft.) - $232.95 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

$85.95 ea.
$85.95 for 1
Sold and shipped by Stainless Headers Mfg.

1.5" OD x 0.049" Wall x 1.402" ID 321 Stainless Steel Round Tube Welded-#4 Brushed Finish - 
Part #: mp-00038290

1.5" OD x 0.049" Wall x 1.402" ID 321 Stainless Steel Round Tube Welded-#4 Brushed Finish -
Part #: mp-00038290

Click for more details

Dimensions

  • Outer Diameter: 1.5"
  • Wall: 0.049"
  • Inner Diameter: 1.402"
  • Ships In: 1-3 Business Days
See all available dimensions for this product
  • 12″ (1 ft.) - $175.95 ea.
  • 36″ (3 ft.) - $671.95 ea.
  • 48″ (4 ft.) - $683.95 ea.
  • 60″ (5 ft.) - $850.95 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

$175.95 ea.
$175.95 for 1
Sold and shipped by Stainless Headers Mfg.

1.5" OD x 0.049" Wall x 1.402" ID 321 Stainless Steel Round Tube Welded - 
Part #: mp-00038347

1.5" OD x 0.049" Wall x 1.402" ID 321 Stainless Steel Round Tube Welded -
Part #: mp-00038347

Click for more details

Dimensions

  • Outer Diameter: 1.5"
  • Wall: 0.049"
  • Inner Diameter: 1.402"
  • Ships In: 1-3 Business Days
See all available dimensions for this product
  • 48″ (4 ft.) - $636.95 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

$636.95 ea.
$636.95 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 - 
Part #: mp-00038357

1.5" OD x 0.035" Wall x 1.43" ID 321 Stainless Steel Round Tube Welded -
Part #: mp-00038357

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
  • 12″ (1 ft.) - $109.95 ea.
  • 48″ (4 ft.) - $405.95 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

$109.95 ea.
$109.95 for 1
Sold and shipped by Stainless Headers Mfg.

1.625" OD x 0.065" Wall x 1.495" ID 321 Stainless Steel Round Tube Welded-#4 Brushed Finish - 
Part #: mp-00038278

1.625" OD x 0.065" Wall x 1.495" ID 321 Stainless Steel Round Tube Welded-#4 Brushed Finish -
Part #: mp-00038278

Click for more details

Dimensions

  • Outer Diameter: 1.625"
  • Wall: 0.065"
  • Inner Diameter: 1.495"
  • Ships In: 1-3 Business Days
See all available dimensions for this product
  • 24″ (2 ft.) - $119.95 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

$119.95 ea.
$119.95 for 1
Sold and shipped by Stainless Headers Mfg.

1.625" OD x 0.065" Wall x 1.495" ID 321 Stainless Steel Round Tube Welded - 
Part #: mp-00038313

1.625" OD x 0.065" Wall x 1.495" ID 321 Stainless Steel Round Tube Welded -
Part #: mp-00038313

Click for more details

Dimensions

  • Outer Diameter: 1.625"
  • Wall: 0.065"
  • Inner Diameter: 1.495"
  • Ships In: 1-3 Business Days
See all available dimensions for this product
  • 12″ (1 ft.) - $54.95 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

$54.95 ea.
$54.95 for 1
Sold and shipped by Stainless Headers Mfg.

1.75" OD x 0.049" Wall x 1.652" ID 321 Stainless Steel Round Tube Welded - 
Part #: mp-00038248

1.75" OD x 0.049" Wall x 1.652" ID 321 Stainless Steel Round Tube Welded -
Part #: mp-00038248

Click for more details

Dimensions

  • Outer Diameter: 1.75"
  • Wall: 0.049"
  • Inner Diameter: 1.652"
  • Ships In: 1-3 Business Days
See all available dimensions for this product
  • 60″ (5 ft.) - $512.95 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

$512.95 ea.
$512.95 for 1
Sold and shipped by Stainless Headers Mfg.

1.75" OD x 0.035" Wall x 1.68" ID 321 Stainless Steel Round Tube Welded-#4 Brushed Finish - 
Part #: mp-00038256

1.75" OD x 0.035" Wall x 1.68" ID 321 Stainless Steel Round Tube Welded-#4 Brushed Finish -
Part #: mp-00038256

Click for more details

Dimensions

  • Outer Diameter: 1.75"
  • Wall: 0.035"
  • Inner Diameter: 1.68"
  • Ships In: 1-3 Business Days
See all available dimensions for this product
  • 36″ (3 ft.) - $648.95 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

$648.95 ea.
$648.95 for 1
Sold and shipped by Stainless Headers Mfg.

1.75" OD x 0.065" Wall x 1.62" ID 321 Stainless Steel Round Tube Welded-#8 Mirror Polished - 
Part #: mp-00038274

1.75" OD x 0.065" Wall x 1.62" ID 321 Stainless Steel Round Tube Welded-#8 Mirror Polished -
Part #: mp-00038274

Click for more details

Dimensions

  • Outer Diameter: 1.75"
  • Wall: 0.065"
  • Inner Diameter: 1.62"
  • Ships In: 1-3 Business Days
See all available dimensions for this product
  • 24″ (2 ft.) - $105.95 ea.
  • 36″ (3 ft.) - $208.95 ea.
  • 48″ (4 ft.) - $302.95 ea.
  • 60″ (5 ft.) - $386.95 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

$105.95 ea.
$105.95 for 1
Sold and shipped by Stainless Headers Mfg.

1.75" OD x 0.049" Wall x 1.652" ID 321 Stainless Steel Round Tube Welded-#4 Brushed Finish - 
Part #: mp-00038307

1.75" OD x 0.049" Wall x 1.652" ID 321 Stainless Steel Round Tube Welded-#4 Brushed Finish -
Part #: mp-00038307

Click for more details

Dimensions

  • Outer Diameter: 1.75"
  • Wall: 0.049"
  • Inner Diameter: 1.652"
  • Ships In: 1-3 Business Days
See all available dimensions for this product
  • 48″ (4 ft.) - $467.95 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

$467.95 ea.
$467.95 for 1
Sold and shipped by Stainless Headers Mfg.

1.75" OD x 0.065" Wall x 1.62" ID 321 Stainless Steel Round Tube Welded - 
Part #: mp-00038309

1.75" OD x 0.065" Wall x 1.62" ID 321 Stainless Steel Round Tube Welded -
Part #: mp-00038309

Click for more details

Dimensions

  • Outer Diameter: 1.75"
  • Wall: 0.065"
  • Inner Diameter: 1.62"
  • Ships In: 1-3 Business Days
See all available dimensions for this product
  • 24″ (2 ft.) - $70.95 ea.
  • 48″ (4 ft.) - $133.95 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

$70.95 ea.
$70.95 for 1
Sold and shipped by Stainless Headers Mfg.

1.75" OD x 0.035" Wall x 1.68" ID 321 Stainless Steel Round Tube Welded - 
Part #: mp-00038308

1.75" OD x 0.035" Wall x 1.68" ID 321 Stainless Steel Round Tube Welded -
Part #: mp-00038308

Click for more details

Dimensions

  • Outer Diameter: 1.75"
  • Wall: 0.035"
  • Inner Diameter: 1.68"
  • Ships In: 1-3 Business Days
See all available dimensions for this product
  • 12″ (1 ft.) - $163.95 ea.
  • 60″ (5 ft.) - $754.95 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

$163.95 ea.
$163.95 for 1
Sold and shipped by Stainless Headers Mfg.

1.75" OD x 0.065" Wall x 1.62" ID 321 Stainless Steel Round Tube Welded-#4 Brushed Finish - 
Part #: mp-00038314

1.75" OD x 0.065" Wall x 1.62" ID 321 Stainless Steel Round Tube Welded-#4 Brushed Finish -
Part #: mp-00038314

Click for more details

Dimensions

  • Outer Diameter: 1.75"
  • Wall: 0.065"
  • Inner Diameter: 1.62"
  • Ships In: 1-3 Business Days
See all available dimensions for this product
  • 12″ (1 ft.) - $40.95 ea.
  • 24″ (2 ft.) - $83.95 ea.
  • 48″ (4 ft.) - $188.95 ea.
  • 60″ (5 ft.) - $234.95 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

$40.95 ea.
$40.95 for 1
Sold and shipped by Stainless Headers Mfg.

1.875" OD x 0.065" Wall x 1.745" ID 321 Stainless Steel Round Tube Welded-#4 Brushed Finish - 
Part #: mp-00038228

1.875" OD x 0.065" Wall x 1.745" ID 321 Stainless Steel Round Tube Welded-#4 Brushed Finish -
Part #: mp-00038228

Click for more details

Dimensions

  • Outer Diameter: 1.875"
  • Wall: 0.065"
  • Inner Diameter: 1.745"
  • Ships In: 1-3 Business Days
See all available dimensions for this product
  • 24″ (2 ft.) - $84.95 ea.
  • 36″ (3 ft.) - $178.95 ea.
  • 60″ (5 ft.) - $241.95 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

$84.95 ea.
$84.95 for 1
Sold and shipped by Stainless Headers Mfg.

1.875" OD x 0.065" Wall x 1.745" ID 321 Stainless Steel Round Tube Welded - 
Part #: mp-00038273

1.875" OD x 0.065" Wall x 1.745" ID 321 Stainless Steel Round Tube Welded -
Part #: mp-00038273

Click for more details

Dimensions

  • Outer Diameter: 1.875"
  • Wall: 0.065"
  • Inner Diameter: 1.745"
  • Ships In: 1-3 Business Days
See all available dimensions for this product
  • 36″ (3 ft.) - $101.95 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

$101.95 ea.
$101.95 for 1
Sold and shipped by Stainless Headers Mfg.

1.875" OD x 0.065" Wall x 1.745" ID 321 Stainless Steel Round Tube Welded-#8 Mirror Polished - 
Part #: mp-00038350

1.875" OD x 0.065" Wall x 1.745" ID 321 Stainless Steel Round Tube Welded-#8 Mirror Polished -
Part #: mp-00038350

Click for more details

Dimensions

  • Outer Diameter: 1.875"
  • Wall: 0.065"
  • Inner Diameter: 1.745"
  • Ships In: 1-3 Business Days
See all available dimensions for this product
  • 24″ (2 ft.) - $109.95 ea.
  • 48″ (4 ft.) - $324.95 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

$109.95 ea.
$109.95 for 1
Sold and shipped by Stainless Headers Mfg.

2" OD x 0.035" Wall x 1.93" ID 321 Stainless Steel Round Tube Welded-#4 Brushed Finish - 
Part #: mp-00038227

2" OD x 0.035" Wall x 1.93" ID 321 Stainless Steel Round Tube Welded-#4 Brushed Finish -
Part #: mp-00038227

Click for more details

Dimensions

  • Outer Diameter: 2"
  • Wall: 0.035"
  • Inner Diameter: 1.93"
  • Ships In: 1-3 Business Days
See all available dimensions for this product
  • 12″ (1 ft.) - $135.95 ea.
  • 24″ (2 ft.) - $269.95 ea.
  • 36″ (3 ft.) - $528.95 ea.
  • 60″ (5 ft.) - $676.95 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

$135.95 ea.
$135.95 for 1
Sold and shipped by Stainless Headers Mfg.

2" OD x 0.065" Wall x 1.87" ID 321 Stainless Steel Round Tube Welded-#8 Mirror Polished - 
Part #: mp-00038242

2" OD x 0.065" Wall x 1.87" ID 321 Stainless Steel Round Tube Welded-#8 Mirror Polished -
Part #: mp-00038242

Click for more details

Dimensions

  • Outer Diameter: 2"
  • Wall: 0.065"
  • Inner Diameter: 1.87"
  • Ships In: 1-3 Business Days
See all available dimensions for this product
  • 12″ (1 ft.) - $50.95 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

$50.95 ea.
$50.95 for 1
Sold and shipped by Stainless Headers Mfg.
  • 1

Can't find what you're looking for?

Contact us for a custom quote