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Home
321 Stainless Steel

321 Stainless Steel

-84 Products

321 Product Guide

| 321 Stainless Steel Tolerance Guide

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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Onlinemetals.com

Stainless Headers Mfg.

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321

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%7B%22item_id%22%3A%2224308%22%2C%22item_name%22%3A%222.75%5C%22+Stainless+Round+Bar+321+Cold+Finish%22%2C%22item_brand%22%3A%22%22%2C%22item_category%22%3A%22Stainless+Steel%22%2C%22item_category2%22%3A%22Bar-Round%22%2C%22item_category3%22%3A%22321%22%2C%22item_category4%22%3A%22%22%2C%22item_category5%22%3A%22Cold+Finished%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

2.75" Stainless Round Bar 321 Cold Finish -
Part #: 24308

2.75" Stainless Round Bar 321 Cold Finish -

Part #: 24308

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

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Dimensions

Diameter: 2.75"

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12″ (1 ft.) - $577.93 ea.

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QTY

$577.93 ea.

$577.93 for 1

Buy More & Save up to 24% !

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Price ea.

Savings

[{"min":"3","max":"4","price":"549.03","dqty":"3-4","dprice":"$549.03","dsaving":"5%","isSelected":null},{"min":"5","max":"6","price":"520.14","dqty":"5-6","dprice":"$520.14","dsaving":"9%","isSelected":null},{"min":"7","max":"12","price":"491.24","dqty":"7-12","dprice":"$491.24","dsaving":"15%","isSelected":null},{"min":"13","max":"24","price":"462.34","dqty":"13-24","dprice":"$462.34","dsaving":"20%","isSelected":null},{"min":"25","max":"9999","price":"433.45","dqty":"25+","dprice":"$433.45","dsaving":"24%","isSelected":null}]

3-4

$549.03

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$520.14

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$491.24

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%7B%22item_id%22%3A%22mp-00038326%22%2C%22item_name%22%3A%223%5C%22+OD+x+0.065%5C%22+Wall+x+2.87%5C%22+ID+321+Stainless+Steel+Round+Tube+Welded-%234+Brushed+Finish%22%2C%22item_brand%22%3A%22%22%2C%22item_category%22%3A%22Stainless+Steel%22%2C%22item_category2%22%3A%22Tube-Round%22%2C%22item_category3%22%3A%22321%22%2C%22item_category4%22%3A%22ANNEALED%22%2C%22item_category5%22%3A%22Welded%22%2C%22item_category6%22%3A%22true%2F%22%2C%22item_category7%22%3A%22%22%2C%22item_category8%22%3A%22true%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

3" OD x 0.065" Wall x 2.87" ID 321 Stainless Steel Round Tube Welded-#4 Brushed Finish -
Part #: mp-00038326

3" OD x 0.065" Wall x 2.87" ID 321 Stainless Steel Round Tube Welded-#4 Brushed Finish -

Part #: mp-00038326

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Dimensions

Outer Diameter: 3"
Wall: 0.065"
Inner Diameter: 2.87"

See all available dimensions for this product

Select a Cut Size for Price Select a Cut Size

12″ (1 ft.) - $55.95 ea.
24″ (2 ft.) - $116.95 ea.
36″ (3 ft.) - $247.95 ea.
48″ (4 ft.) - $270.95 ea.
60″ (5 ft.) - $337.95 ea.

Create Custom Cut

QTY

$55.95 ea.

$55.95 for 1

Sold and shipped by Stainless Headers Mfg.

%7B%22item_id%22%3A%22mp-00038342%22%2C%22item_name%22%3A%223%5C%22+OD+x+0.065%5C%22+Wall+x+2.87%5C%22+ID+321+Stainless+Steel+Round+Tube+Welded-%238+Mirror+Polished%22%2C%22item_brand%22%3A%22%22%2C%22item_category%22%3A%22Stainless+Steel%22%2C%22item_category2%22%3A%22Tube-Round%22%2C%22item_category3%22%3A%22321%22%2C%22item_category4%22%3A%22ANNEALED%22%2C%22item_category5%22%3A%22Welded%22%2C%22item_category6%22%3A%22true%2F%22%2C%22item_category7%22%3A%22%22%2C%22item_category8%22%3A%22true%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

3" OD x 0.065" Wall x 2.87" ID 321 Stainless Steel Round Tube Welded-#8 Mirror Polished -
Part #: mp-00038342

3" OD x 0.065" Wall x 2.87" ID 321 Stainless Steel Round Tube Welded-#8 Mirror Polished -

Part #: mp-00038342

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Dimensions

Outer Diameter: 3"
Wall: 0.065"
Inner Diameter: 2.87"

See all available dimensions for this product

Select a Cut Size for Price Select a Cut Size

12″ (1 ft.) - $67.95 ea.
24″ (2 ft.) - $153.95 ea.
36″ (3 ft.) - $317.95 ea.
48″ (4 ft.) - $466.95 ea.
60″ (5 ft.) - $597.95 ea.

Create Custom Cut

QTY

$67.95 ea.

$67.95 for 1

Sold and shipped by Stainless Headers Mfg.

%7B%22item_id%22%3A%22mp-00038344%22%2C%22item_name%22%3A%223%5C%22+OD+x+0.065%5C%22+Wall+x+2.87%5C%22+ID+321+Stainless+Steel+Round+Tube+Welded%22%2C%22item_brand%22%3A%22%22%2C%22item_category%22%3A%22Stainless+Steel%22%2C%22item_category2%22%3A%22Tube-Round%22%2C%22item_category3%22%3A%22321%22%2C%22item_category4%22%3A%22ANNEALED%22%2C%22item_category5%22%3A%22Welded%22%2C%22item_category6%22%3A%22true%2F%22%2C%22item_category7%22%3A%22%22%2C%22item_category8%22%3A%22true%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

3" OD x 0.065" Wall x 2.87" ID 321 Stainless Steel Round Tube Welded -
Part #: mp-00038344

3" OD x 0.065" Wall x 2.87" ID 321 Stainless Steel Round Tube Welded -

Part #: mp-00038344

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Dimensions

Outer Diameter: 3"
Wall: 0.065"
Inner Diameter: 2.87"

See all available dimensions for this product

Select a Cut Size for Price Select a Cut Size

12″ (1 ft.) - $47.95 ea.
24″ (2 ft.) - $92.95 ea.
36″ (3 ft.) - $135.95 ea.
48″ (4 ft.) - $176.95 ea.
60″ (5 ft.) - $219.95 ea.

Create Custom Cut

QTY

$47.95 ea.

$47.95 for 1

Sold and shipped by Stainless Headers Mfg.

%7B%22item_id%22%3A%2227516%22%2C%22item_name%22%3A%223.25%5C%22+Stainless+Round+Bar+321+Rough+Turned%22%2C%22item_brand%22%3A%22%22%2C%22item_category%22%3A%22Stainless+Steel%22%2C%22item_category2%22%3A%22Bar-Round%22%2C%22item_category3%22%3A%22321%22%2C%22item_category4%22%3A%22%22%2C%22item_category5%22%3A%22Rough+Turned%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

3.25" Stainless Round Bar 321 Rough Turned -
Part #: 27516

3.25" Stainless Round Bar 321 Rough Turned -

Part #: 27516

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Dimensions

Diameter: 3.25"

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Select a Cut Size for Price Select a Cut Size

144″ (12 ft.) - $7,684.50 ea.

Create Custom Cut

QTY

$7,684.50 ea.

$7,684.50 for 1

%7B%22item_id%22%3A%2228038%22%2C%22item_name%22%3A%223.5%5C%22+Stainless+Round+Bar+321+Rough+Turned%22%2C%22item_brand%22%3A%22%22%2C%22item_category%22%3A%22Stainless+Steel%22%2C%22item_category2%22%3A%22Bar-Round%22%2C%22item_category3%22%3A%22321%22%2C%22item_category4%22%3A%22%22%2C%22item_category5%22%3A%22Rough+Turned%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

3.5" Stainless Round Bar 321 Rough Turned -
Part #: 28038

3.5" Stainless Round Bar 321 Rough Turned -

Part #: 28038

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Dimensions

Diameter: 3.5"

See all available dimensions for this product

Select a Cut Size for Price Select a Cut Size

12″ (1 ft.) - $743.16 ea.
24″ (2 ft.) - $1,404.08 ea.
36″ (3 ft.) - $2,073.20 ea.
44″ (44 in.) - $2,633.73 ea. - For Unwavering Customers, Unmatched Priced Shipping
48″ (4 ft.) - $2,687.48 ea.
72″ (6 ft.) - $3,702.15 ea.
96″ (8 ft.) - $4,738.76 ea.
144″ (12 ft.) - $6,581.60 ea.

Create Custom Cut

QTY

$743.16 ea.

$743.16 for 1

Buy More & Save up to 25% !

Qty

Price ea.

Savings

[{"min":"3","max":"4","price":"706.00","dqty":"3-4","dprice":"$706.00","dsaving":"5%","isSelected":null},{"min":"5","max":"6","price":"668.84","dqty":"5-6","dprice":"$668.84","dsaving":"10%","isSelected":null},{"min":"7","max":"12","price":"631.69","dqty":"7-12","dprice":"$631.69","dsaving":"14%","isSelected":null},{"min":"13","max":"24","price":"594.53","dqty":"13-24","dprice":"$594.53","dsaving":"19%","isSelected":null},{"min":"25","max":"9999","price":"557.37","dqty":"25+","dprice":"$557.37","dsaving":"25%","isSelected":null}]

3-4

$706.00

5-6

$668.84

10%

7-12

$631.69

14%

13-24

$594.53

19%

25+

$557.37

25%

Less

4.5" Stainless Round Bar T-321 -
Part #: 23922

4.5" Stainless Round Bar T-321-

Part #: 23922

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Dimensions

Diameter: 4.5"

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

7" Stainless Round Bar 321 Cold Finish -
Part #: 27939

7" Stainless Round Bar 321 Cold Finish-

Part #: 27939

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Dimensions

Diameter: 7"

See all available dimensions for this product

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

2" Stainless Plate 321 -
Part #: 25670

2" Stainless Plate 321-

Part #: 25670

Click for more details

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

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