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321 Stainless Steel

-84 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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0.5" OD x 0.035" Wall x 0.43" ID Stainless Round Tube 321 Seamless - 
Part #: 28172

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

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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.

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.) - $732.65 ea.
  • 12″ X 24″ (1 X 2 ft.) - $1,384.19 ea.
  • 12″ X 36″ (1 X 3 ft.) - $2,043.85 ea.
  • 12″ X 48″ (1 X 4 ft.) - $2,649.43 ea.
  • 24″ X 24″ (2 X 2 ft.) - $2,649.43 ea.
  • 24″ X 36″ (2 X 3 ft.) - $3,795.74 ea.
Create Custom Cut

QTY

$732.65 ea.
$732.65 for 1

0.625" Stainless Round Bar 321 - 
Part #: 17902

0.625" Stainless Round Bar 321 -
Part #: 17902

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Dimensions

  • Diameter: 0.625"
See all available dimensions for this product
  • 12″ (1 ft.) - $27.04 ea.
  • 24″ (2 ft.) - $52.61 ea.
  • 36″ (3 ft.) - $71.81 ea.
  • 44″ (44 in.) - $87.75 ea.

    Order to avoid UPS additional handling fees

  • 48″ (4 ft.) - $89.54 ea.
  • 72″ (6 ft.) - $126.45 ea.
  • 96″ (8 ft.) - $157.49 ea.
  • 144″ (12 ft.) - $196.06 ea.
Create Custom Cut

QTY

$27.04 ea.
$27.04 for 1
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Price ea.
Savings
5-9
$25.69
4%
10-14
$24.34
9%
15-24
$22.98
15%
25-49
$21.63
20%
50+
$20.28
25%
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0.625" Stainless Hex Bar 321 Cold Finish - 
Part #: 18418

0.625" Stainless Hex Bar 321 Cold Finish -
Part #: 18418

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Dimensions

  • Across Flats: 0.625"
See all available dimensions for this product
  • 12″ (1 ft.) - $53.75 ea.
  • 24″ (2 ft.) - $104.55 ea.
  • 36″ (3 ft.) - $142.72 ea.
  • 44″ (44 in.) - $174.40 ea.

    Order to avoid UPS additional handling fees

  • 48″ (4 ft.) - $177.96 ea.
  • 72″ (6 ft.) - $251.34 ea.
  • 96″ (8 ft.) - $313.03 ea.
  • 144″ (12 ft.) - $389.68 ea.
Create Custom Cut

QTY

$53.75 ea.
$53.75 for 1
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Qty
Price ea.
Savings
5-9
$51.06
5%
10-14
$48.38
9%
15-24
$45.69
14%
25-49
$43.00
20%
50+
$40.31
25%
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0.6875" Stainless Round Bar 321 Cold Finish - 
Part #: 18435

0.6875" Stainless Round Bar 321 Cold Finish -
Part #: 18435

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Dimensions

  • Diameter: 0.6875"
See all available dimensions for this product
  • 12″ (1 ft.) - $32.70 ea.
  • 24″ (2 ft.) - $63.63 ea.
  • 36″ (3 ft.) - $86.85 ea.
  • 44″ (44 in.) - $106.14 ea.

    Order to avoid UPS additional handling fees

  • 48″ (4 ft.) - $108.31 ea.
  • 72″ (6 ft.) - $152.97 ea.
  • 96″ (8 ft.) - $190.51 ea.
  • 144″ (12 ft.) - $237.16 ea.
Create Custom Cut

QTY

$32.70 ea.
$32.70 for 1
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Qty
Price ea.
Savings
5-9
$31.07
4%
10-14
$29.43
10%
15-24
$27.80
14%
25-49
$26.16
20%
50+
$24.53
24%
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0.75" Stainless Round Bar 321 - 
Part #: 18436

0.75" Stainless Round Bar 321 -
Part #: 18436

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Dimensions

  • Diameter: 0.75"
See all available dimensions for this product
  • 12″ (1 ft.) - $33.70 ea.
  • 24″ (2 ft.) - $65.56 ea.
  • 36″ (3 ft.) - $89.48 ea.
  • 44″ (44 in.) - $109.34 ea.

    Order to avoid UPS additional handling fees

  • 48″ (4 ft.) - $111.57 ea.
  • 72″ (6 ft.) - $157.59 ea.
  • 96″ (8 ft.) - $196.27 ea.
  • 144″ (12 ft.) - $244.30 ea.
Create Custom Cut

QTY

$33.70 ea.
$33.70 for 1
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Qty
Price ea.
Savings
5-9
$32.02
4%
10-14
$30.33
10%
15-24
$28.65
14%
25-49
$26.96
20%
50+
$25.28
24%
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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.

0.875" Stainless Round Bar 321 Cold Finish - 
Part #: 18438

0.875" Stainless Round Bar 321 Cold Finish -
Part #: 18438

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Dimensions

  • Diameter: 0.875"
See all available dimensions for this product
  • 12″ (1 ft.) - $84.97 ea.
  • 24″ (2 ft.) - $165.28 ea.
  • 36″ (3 ft.) - $225.61 ea.
  • 44″ (44 in.) - $275.66 ea.

    Order to avoid UPS additional handling fees

  • 48″ (4 ft.) - $281.29 ea.
  • 72″ (6 ft.) - $397.29 ea.
  • 96″ (8 ft.) - $494.82 ea.
  • 144″ (12 ft.) - $615.96 ea.
Create Custom Cut

QTY

$84.97 ea.
$84.97 for 1
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Qty
Price ea.
Savings
5-9
$80.72
5%
10-14
$76.47
10%
15-24
$72.22
15%
25-49
$67.98
19%
50+
$63.73
24%
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0.9375" Stainless Round Bar 321 Cold Finish - 
Part #: 18439

0.9375" Stainless Round Bar 321 Cold Finish -
Part #: 18439

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Dimensions

  • Diameter: 0.9375"
See all available dimensions for this product
  • 12″ (1 ft.) - $52.03 ea.
  • 24″ (2 ft.) - $101.24 ea.
  • 36″ (3 ft.) - $138.18 ea.
  • 44″ (44 in.) - $168.84 ea.

    Order to avoid UPS additional handling fees

  • 48″ (4 ft.) - $172.29 ea.
  • 72″ (6 ft.) - $243.35 ea.
  • 96″ (8 ft.) - $303.08 ea.
  • 144″ (12 ft.) - $377.28 ea.
Create Custom Cut

QTY

$52.03 ea.
$52.03 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.) - $49.82 ea.
  • 24″ (2 ft.) - $96.92 ea.
  • 36″ (3 ft.) - $132.29 ea.
  • 44″ (44 in.) - $161.65 ea.

    Order to avoid UPS additional handling fees

  • 48″ (4 ft.) - $164.95 ea.
  • 72″ (6 ft.) - $232.97 ea.
  • 96″ (8 ft.) - $290.16 ea.
  • 144″ (12 ft.) - $361.20 ea.
Create Custom Cut

QTY

$49.82 ea.
$49.82 for 1

1" Stainless Round Bar 321 - 
Part #: 13471

1" Stainless Round Bar 321 -
Part #: 13471

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

Dimensions

  • Diameter: 1"
See all available dimensions for this product
  • 12″ (1 ft.) - $113.07 ea.
  • 24″ (2 ft.) - $220.02 ea.
  • 36″ (3 ft.) - $300.30 ea.
  • 44″ (44 in.) - $366.93 ea.

    Order to avoid UPS additional handling fees

  • 48″ (4 ft.) - $374.42 ea.
  • 72″ (6 ft.) - $528.85 ea.
  • 96″ (8 ft.) - $658.65 ea.
  • 144″ (12 ft.) - $819.92 ea.
Create Custom Cut

QTY

$113.07 ea.
$113.07 for 1
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Qty
Price ea.
Savings
5-9
$107.42
4%
10-14
$101.76
10%
15-24
$96.11
14%
25-49
$90.46
19%
50+
$84.80
25%
More
Less

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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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.

1.125" Stainless Hex Bar 321 Cold Finish - 
Part #: 18425

1.125" 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.
  • 44″ (44 in.) - $210.33 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.
Create Custom Cut

QTY

$64.81 ea.
$64.81 for 1

1.125" Stainless Round Bar 321- Annealed - 
Part #: 7876

1.125" Stainless Round Bar 321- Annealed -
Part #: 7876

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Dimensions

  • Diameter: 1.125"
See all available dimensions for this product
  • 12″ (1 ft.) - $94.30 ea.
  • 24″ (2 ft.) - $183.48 ea.
  • 36″ (3 ft.) - $250.46 ea.
  • 44″ (44 in.) - $306.03 ea.

    Order to avoid UPS additional handling fees

  • 48″ (4 ft.) - $312.28 ea.
  • 72″ (6 ft.) - $441.05 ea.
  • 96″ (8 ft.) - $549.34 ea.
  • 144″ (12 ft.) - $683.80 ea.
Create Custom Cut

QTY

$94.30 ea.
$94.30 for 1
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Qty
Price ea.
Savings
5-9
$89.59
4%
10-14
$84.87
10%
15-24
$80.16
14%
25-49
$75.44
20%
50+
$70.73
24%
More
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1.25" Stainless Round Bar 321 - 
Part #: 18440

1.25" Stainless Round Bar 321 -
Part #: 18440

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

Dimensions

  • Diameter: 1.25"
See all available dimensions for this product
  • 12″ (1 ft.) - $115.49 ea.
  • 24″ (2 ft.) - $224.69 ea.
  • 36″ (3 ft.) - $306.68 ea.
  • 48″ (4 ft.) - $382.39 ea.
  • 72″ (6 ft.) - $540.10 ea.
  • 96″ (8 ft.) - $672.68 ea.
  • 144″ (12 ft.) - $837.34 ea.
Create Custom Cut

QTY

$115.49 ea.
$115.49 for 1
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Qty
Price ea.
Savings
5-9
$109.72
4%
10-14
$103.94
10%
15-24
$98.17
14%
25-49
$92.39
20%
50+
$86.62
24%
More
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1.25" Stainless Plate 321 - 
Part #: 21183

1.25" Stainless Plate 321-
Part #: 21183

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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.

1.375" Stainless Round Bar 321 Cold Finish - 
Part #: 18441

1.375" Stainless Round Bar 321 Cold Finish -
Part #: 18441

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

Dimensions

  • Diameter: 1.375"
See all available dimensions for this product
  • 12″ (1 ft.) - $131.44 ea.
  • 24″ (2 ft.) - $255.70 ea.
  • 36″ (3 ft.) - $349.02 ea.
  • 48″ (4 ft.) - $435.19 ea.
  • 72″ (6 ft.) - $614.66 ea.
  • 96″ (8 ft.) - $765.54 ea.
  • 144″ (12 ft.) - $952.96 ea.
Create Custom Cut

QTY

$131.44 ea.
$131.44 for 1
qty discount iconBuy More & Save up to 25% !
Qty
Price ea.
Savings
5-9
$124.87
4%
10-14
$118.30
9%
15-24
$111.72
15%
25-49
$105.15
20%
50+
$98.58
25%
More
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1.5" Stainless Round Bar 321-Annealed - 
Part #: 12884

1.5" 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.
  • 44″ (44 in.) - $557.55 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.
Create Custom Cut

QTY

$171.82 ea.
$171.82 for 1
qty discount iconBuy More & Save up to 24% !
Qty
Price ea.
Savings
3-4
$163.23
4%
5-6
$154.64
9%
7-12
$146.05
14%
13-24
$137.46
19%
25+
$128.87
24%
More
Less

1.5" Stainless Hex Bar 321 Cold Finish - 
Part #: 18428

1.5" 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.
  • 44″ (44 in.) - $696.62 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.
Create Custom Cut

QTY

$214.69 ea.
$214.69 for 1

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

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

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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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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 0.035" 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

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Dimensions

  • Outer Diameter: 1.5"
  • Wall: 0.035"
  • Inner Diameter: 1.43"
See all available dimensions for this product
  • 12″ (1 ft.) - $113.95 ea.
  • 24″ (2 ft.) - $225.95 ea.
  • 36″ (3 ft.) - $441.95 ea.
  • 48″ (4 ft.) - $453.95 ea.
  • 60″ (5 ft.) - $563.95 ea.
Create Custom Cut

QTY

$113.95 ea.
$113.95 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"
See all available dimensions for this product
  • 12″ (1 ft.) - $109.95 ea.
  • 24″ (2 ft.) - $213.95 ea.
  • 36″ (3 ft.) - $312.95 ea.
  • 48″ (4 ft.) - $405.95 ea.
  • 60″ (5 ft.) - $504.95 ea.
Create Custom Cut

QTY

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

1.625" Stainless Hex Bar 321 Cold Finish - 
Part #: 18429

1.625" Stainless Hex Bar 321 Cold Finish -
Part #: 18429

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

Dimensions

  • Across Flats: 1.625"
See all available dimensions for this product
  • 12″ (1 ft.) - $131.41 ea.
  • 24″ (2 ft.) - $255.67 ea.
  • 36″ (3 ft.) - $348.96 ea.
  • 44″ (44 in.) - $426.41 ea.

    Order to avoid UPS additional handling fees

  • 48″ (4 ft.) - $435.11 ea.
  • 72″ (6 ft.) - $614.56 ea.
  • 96″ (8 ft.) - $765.42 ea.
  • 144″ (12 ft.) - $952.80 ea.
Create Custom Cut

QTY

$131.41 ea.
$131.41 for 1
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