{"title":"Tube - 321 Stainless Steel","description":"\u003cp\u003eOur selection of 321 Stainless Tubing is an excellent choice for high temperature, performance automotive applications, including fabricating full exhaust systems, downpipes, or headers.\u003c\/p\u003e\n\u003cul\u003e\n\u003cli\u003eFabricate Headers, Exhausts, Downpipes, and more!\u003cbr\u003e\n\u003c\/li\u003e\n\u003cli\u003eHigh quality 321 Stainless Steel\u003cbr\u003e\n\u003c\/li\u003e\n\u003cli\u003eAvailable in 2-foot and 4-foot lengths\u003c\/li\u003e\n\u003cli\u003eOutside diameters ranging from 1.500\" to 3.000\"\u003cbr\u003e\n\u003c\/li\u003e\n\u003cli\u003eAvailable with a Polished OD \u003c\/li\u003e\n\u003cli\u003eA perfect fit for our Stainless Steel\u003cspan\u003e \u003c\/span\u003e\u003ca title=\"Stainless V-Band Clamps and Flanges | Ace Race Parts\" href=\"https:\/\/www.aceraceparts.com\/collections\/v-band-clamps-flanges-304-stainless\"\u003eV-Band Clamps \u0026amp; Flanges\u003c\/a\u003e, Stainless Steel\u003cspan\u003e \u003c\/span\u003e\u003ca title=\"Stainless Exhaust Mandrel Bends | Ace Race Parts\" href=\"https:\/\/www.aceraceparts.com\/collections\/mandrel-bends-stainless-steel\" target=\"_blank\"\u003eMandrel Bends\u003c\/a\u003e, Stainless Steel\u003cspan\u003e \u003c\/span\u003e\u003ca title=\"Stainless Steel Exhaust Flanges | Ace Race Parts\" href=\"https:\/\/www.aceraceparts.com\/collections\/flanges-gaskets-exhaust-flanges-gaskets\"\u003eExhaust Flanges\u003c\/a\u003e, and Stainless Steel\u003cspan\u003e \u003c\/span\u003e\u003ca title=\"Stainless Flex Bellows and Flex Couplings | Ace Race Parts\" href=\"https:\/\/www.aceraceparts.com\/collections\/flex-couplings\"\u003eFlex Bellows \u0026amp; Flex Couplings\u003c\/a\u003e\n\u003c\/li\u003e\n\u003c\/ul\u003e","products":[{"product_id":"2-250-od-x-16ga-0-065-round-tube-polished-od-321-stainless-4-foot-length","title":"2.250\" OD x 16ga (0.065\") Round Tube - Polished OD - 321 Stainless - 4 Foot Length","description":"\u003cp\u003eAce Race Parts 321 Stainless Steel Tubing is manufactured in an ISO 9001 certified facility and is the highest quality and lowest price 321 Stainless Steel tubing available in the automotive, industrial, and marine markets today. Our 321 Stainless tube is manufactured to the ASTM A269 specification and offers a clean, high quality welding experience due to an extensive testing and inspection process prior to shipment. Our 321 Stainless tubing is an exceptional choice for high performance, lightweight, and high temperature exhaust systems and other automotive applications. \u003c\/p\u003e\n\u003cp\u003e321 Stainless tubing is available in outside diameter ranges from 1.500\" to 3.000\" and is available in convenient 4'-0\" lengths. With a high quality brushed finish on the outside of the tube, our 321 Stainless tubing offers a high quality welding experience and is ensured to fit perfectly with our 321 Stainless Mandrel Bends, 304 Stainless \u003ca rel=\"noopener noreferrer\" title=\"V-Band, V-Band Clamps, Exhaust V-Bands, V-Band Flanges\" href=\"https:\/\/www.aceraceparts.com\/collections\/v-bands\/stainless-steel\" target=\"_blank\"\u003eV-Band Clamps \u0026amp; Flanges\u003c\/a\u003e, 304 and 321 Stainless \u003ca rel=\"noopener noreferrer\" title=\"Exhaust Bellow, Flex Coupling, Exhaust Coupling, Flex Bellows\" href=\"https:\/\/www.aceraceparts.com\/collections\/flex-couplings\" target=\"_blank\"\u003eFlex Bellows and Flex Bellows\u003c\/a\u003e, Stainless \u003ca rel=\"noopener noreferrer\" title=\"O2 Sensor Bungs, Bung Plugs, Bungs\" href=\"https:\/\/www.aceraceparts.com\/collections\/o2-sensor-bungs\/O2-Bungs\" target=\"_blank\"\u003eBungs\u003c\/a\u003e, and Stainless \u003ca rel=\"noopener noreferrer\" title=\"Exhaust Flange, Exhaust Flanges, Stainless Exhaust Flanges, Exhaust Gaskets\" href=\"https:\/\/www.aceraceparts.com\/collections\/exhaust-turbo-inlet-turbo-outlet-header-exhaust-flanges\" target=\"_blank\"\u003eExhaust Flanges\u003c\/a\u003e. \u003cbr\u003e\u003c\/p\u003e\n\u003ch3 style=\"text-align: center;\"\u003e\u003cspan\u003eWHAT IS 321 STAINLESS STEEL?\u003c\/span\u003e\u003c\/h3\u003e\n\u003cp\u003e321 Stainless Steel, like 304 Stainless Steel, is a low carbon, chromium nickel alloy with good intergranular corrosion resistance. 304 Stainless has good corrosion resistance up to 1,562°F (850°C); whereas, 321 Stainless allows for a higher temperature limit, including long term exposure to high temperatures, up to 1,652°F (900°C) due to the addition of Titanium, which acts as a stabilizer. 321 Stainless Steel's main advantage over 304 Stainless Steel in high temperature environments is that 321 Stainless offers better resistance to stress fractures. This higher resistance to stress fractures has advantages in automotive applications where differences in the Coefficient of Thermal Expansion (heat-related expansion and contraction which occurs at different rates) are greatest — typically between the engine and the manifold(s). 321 Stainless is better suited to handle this type of heat-related stress, as compared to 304 Stainless. While 304 Stainless is suitable for a wide variety of automotive applications, 321 Stainless is the superior choice for high temperature applications, and especially applications that see long term exposure to high temperatures like race cars, and offers a higher resistance to stress fractures and heat-related corrosion. For welding 321 Stainless Steel (including welding 321 Stainless to 304 Stainless) we recommend ER347 Filler Rod.\u003c\/p\u003e\n\u003cp\u003e\u003cstrong style=\"line-height: 1.4;\"\u003e\u003cb\u003eDETAILED SPECIFICATIONS:\u003c\/b\u003e\u003c\/strong\u003e\u003c\/p\u003e\n\u003ctable\u003e\n\u003ctbody\u003e\n\u003ctr\u003e\n\u003ctd\u003e\u003cstrong\u003eOutside Diameter\u003c\/strong\u003e\u003c\/td\u003e\n\u003ctd\u003e\u003cstrong\u003e2.250\"\u003c\/strong\u003e\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eWall Thickness (Specified)\u003c\/td\u003e\n\u003ctd\u003e16ga (0.065\")\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003e\n\u003cdiv\u003e\n\u003cspan style=\"font-family: -apple-system, BlinkMacSystemFont, 'San Francisco', 'Segoe UI', Roboto, 'Helvetica Neue', sans-serif; font-size: 0.875rem;\"\u003eInside Diameter \u003c\/span\u003e\u003cbr\u003e\u003cmeta charset=\"utf-8\"\u003e\n\u003c\/div\u003e\n\u003c\/td\u003e\n\u003ctd\u003e\n\u003cdiv\u003e\n\u003cspan style=\"font-family: -apple-system, BlinkMacSystemFont, 'San Francisco', 'Segoe UI', Roboto, 'Helvetica Neue', sans-serif; font-size: 0.875rem;\"\u003e2.120\" (approximately)\u003c\/span\u003e\u003cbr\u003e\u003cmeta charset=\"utf-8\"\u003e\n\u003c\/div\u003e\n\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eLength\u003c\/td\u003e\n\u003ctd\u003e48\"\u003cbr\u003e\n\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003ePounds Per Foot (Specified)\u003c\/td\u003e\n\u003ctd\u003e1.531 Lbs\/Ft\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eFinish\u003c\/td\u003e\n\u003ctd\u003e180 Grit Brushed\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eSpecification\u003c\/td\u003e\n\u003ctd\u003eASTM A269\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003c\/tbody\u003e\n\u003c\/table\u003e","brand":"Ace Race Parts","offers":[{"title":"Default Title","offer_id":40819565396031,"sku":"20201","price":108.0,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0972\/8304\/files\/Tube-2020-750x_72f4dd18-f64d-40b7-8d51-ebf13f1352cc.jpg?v=1715359045"},{"product_id":"2-500-od-x-16ga-0-065-round-tube-polished-od-321-stainless-4-foot-length","title":"2.500\" OD x 16ga (0.065\") Round Tube - Polished OD - 321 Stainless - 4 Foot Length","description":"\u003cp\u003eAce Race Parts 321 Stainless Steel Tubing is manufactured in an ISO 9001 certified facility and is the highest quality and lowest price 321 Stainless Steel tubing available in the automotive, industrial, and marine markets today. Our 321 Stainless tube is manufactured to the ASTM A269 specification and offers a clean, high quality welding experience due to an extensive testing and inspection process prior to shipment. Our 321 Stainless tubing is an exceptional choice for high performance, lightweight, and high temperature exhaust systems and other automotive applications. \u003c\/p\u003e\n\u003cp\u003e321 Stainless tubing is available in outside diameter ranges from 1.500\" to 3.000\" and is available in convenient 4'-0\" lengths. With a high quality brushed finish on the outside of the tube, our 321 Stainless tubing offers a high quality welding experience and is ensured to fit perfectly with our 321 Stainless Mandrel Bends, 304 Stainless \u003ca rel=\"noopener noreferrer\" title=\"V-Band, V-Band Clamps, Exhaust V-Bands, V-Band Flanges\" href=\"https:\/\/www.aceraceparts.com\/collections\/v-bands\/stainless-steel\" target=\"_blank\"\u003eV-Band Clamps \u0026amp; Flanges\u003c\/a\u003e, 304 and 321 Stainless \u003ca rel=\"noopener noreferrer\" title=\"Exhaust Bellow, Flex Coupling, Exhaust Coupling, Flex Bellows\" href=\"https:\/\/www.aceraceparts.com\/collections\/flex-couplings\" target=\"_blank\"\u003eFlex Bellows and Flex Bellows\u003c\/a\u003e, Stainless \u003ca rel=\"noopener noreferrer\" title=\"O2 Sensor Bungs, Bung Plugs, Bungs\" href=\"https:\/\/www.aceraceparts.com\/collections\/o2-sensor-bungs\/O2-Bungs\" target=\"_blank\"\u003eBungs\u003c\/a\u003e, and Stainless \u003ca rel=\"noopener noreferrer\" title=\"Exhaust Flange, Exhaust Flanges, Stainless Exhaust Flanges, Exhaust Gaskets\" href=\"https:\/\/www.aceraceparts.com\/collections\/exhaust-turbo-inlet-turbo-outlet-header-exhaust-flanges\" target=\"_blank\"\u003eExhaust Flanges\u003c\/a\u003e. \u003cbr\u003e\u003c\/p\u003e\n\u003ch3 style=\"text-align: center;\"\u003e\u003cspan\u003eWHAT IS 321 STAINLESS STEEL?\u003c\/span\u003e\u003c\/h3\u003e\n\u003cp\u003e321 Stainless Steel, like 304 Stainless Steel, is a low carbon, chromium nickel alloy with good intergranular corrosion resistance. 304 Stainless has good corrosion resistance up to 1,562°F (850°C); whereas, 321 Stainless allows for a higher temperature limit, including long term exposure to high temperatures, up to 1,652°F (900°C) due to the addition of Titanium, which acts as a stabilizer. 321 Stainless Steel's main advantage over 304 Stainless Steel in high temperature environments is that 321 Stainless offers better resistance to stress fractures. This higher resistance to stress fractures has advantages in automotive applications where differences in the Coefficient of Thermal Expansion (heat-related expansion and contraction which occurs at different rates) are greatest — typically between the engine and the manifold(s). 321 Stainless is better suited to handle this type of heat-related stress, as compared to 304 Stainless. While 304 Stainless is suitable for a wide variety of automotive applications, 321 Stainless is the superior choice for high temperature applications, and especially applications that see long term exposure to high temperatures like race cars, and offers a higher resistance to stress fractures and heat-related corrosion. For welding 321 Stainless Steel (including welding 321 Stainless to 304 Stainless) we recommend ER347 Filler Rod.\u003cbr\u003e\u003c\/p\u003e","brand":"Ace Race Parts","offers":[{"title":"Default Title","offer_id":40819573162047,"sku":"20202","price":120.0,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0972\/8304\/files\/Tube-2020-750x_69683808-8749-4c55-b8c9-7b3955a6f518.jpg?v=1715359403"},{"product_id":"3-000-od-x-16ga-0-065-round-tube-polished-od-321-stainless-4-foot-length","title":"3.000\" OD x 16ga (0.065\") Round Tube - Polished OD - 321 Stainless - 4 Foot Length","description":"\u003cp\u003eAce Race Parts 321 Stainless Steel Tubing is manufactured in an ISO 9001 certified facility and is the highest quality and lowest price 321 Stainless Steel tubing available in the automotive, industrial, and marine markets today. Our 321 Stainless tube is manufactured to the ASTM A269 specification and offers a clean, high quality welding experience due to an extensive testing and inspection process prior to shipment. Our 321 Stainless tubing is an exceptional choice for high performance, lightweight, and high temperature exhaust systems and other automotive applications. \u003c\/p\u003e\n\u003cp\u003e321 Stainless tubing is available in outside diameter ranges from 1.500\" to 3.000\" and is available in convenient 4'-0\" lengths. With a high quality brushed finish on the outside of the tube, our 321 Stainless tubing offers a high quality welding experience and is ensured to fit perfectly with our 321 Stainless Mandrel Bends, 304 Stainless \u003ca rel=\"noopener noreferrer\" title=\"V-Band, V-Band Clamps, Exhaust V-Bands, V-Band Flanges\" href=\"https:\/\/www.aceraceparts.com\/collections\/v-bands\/stainless-steel\" target=\"_blank\"\u003eV-Band Clamps \u0026amp; Flanges\u003c\/a\u003e, 304 and 321 Stainless \u003ca rel=\"noopener noreferrer\" title=\"Exhaust Bellow, Flex Coupling, Exhaust Coupling, Flex Bellows\" href=\"https:\/\/www.aceraceparts.com\/collections\/flex-couplings\" target=\"_blank\"\u003eFlex Bellows and Flex Bellows\u003c\/a\u003e, Stainless \u003ca rel=\"noopener noreferrer\" title=\"O2 Sensor Bungs, Bung Plugs, Bungs\" href=\"https:\/\/www.aceraceparts.com\/collections\/o2-sensor-bungs\/O2-Bungs\" target=\"_blank\"\u003eBungs\u003c\/a\u003e, and Stainless \u003ca rel=\"noopener noreferrer\" title=\"Exhaust Flange, Exhaust Flanges, Stainless Exhaust Flanges, Exhaust Gaskets\" href=\"https:\/\/www.aceraceparts.com\/collections\/exhaust-turbo-inlet-turbo-outlet-header-exhaust-flanges\" target=\"_blank\"\u003eExhaust Flanges\u003c\/a\u003e. \u003cbr\u003e\u003c\/p\u003e\n\u003ch3 style=\"text-align: center;\"\u003e\u003cspan\u003eWHAT IS 321 STAINLESS STEEL?\u003c\/span\u003e\u003c\/h3\u003e\n\u003cp\u003e321 Stainless Steel, like 304 Stainless Steel, is a low carbon, chromium nickel alloy with good intergranular corrosion resistance. 304 Stainless has good corrosion resistance up to 1,562°F (850°C); whereas, 321 Stainless allows for a higher temperature limit, including long term exposure to high temperatures, up to 1,652°F (900°C) due to the addition of Titanium, which acts as a stabilizer. 321 Stainless Steel's main advantage over 304 Stainless Steel in high temperature environments is that 321 Stainless offers better resistance to stress fractures. This higher resistance to stress fractures has advantages in automotive applications where differences in the Coefficient of Thermal Expansion (heat-related expansion and contraction which occurs at different rates) are greatest — typically between the engine and the manifold(s). 321 Stainless is better suited to handle this type of heat-related stress, as compared to 304 Stainless. While 304 Stainless is suitable for a wide variety of automotive applications, 321 Stainless is the superior choice for high temperature applications, and especially applications that see long term exposure to high temperatures like race cars, and offers a higher resistance to stress fractures and heat-related corrosion. For welding 321 Stainless Steel (including welding 321 Stainless to 304 Stainless) we recommend ER347 Filler Rod.\u003cbr\u003e\u003c\/p\u003e","brand":"Ace Race Parts","offers":[{"title":"Default Title","offer_id":40819575816255,"sku":"20203","price":140.0,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0972\/8304\/files\/Tube-2020-750x_5c8bb43c-b2fb-4338-8113-7f15e63e70e8.jpg?v=1715359588"},{"product_id":"1-500-od-x-18ga-0-049-round-tube-polished-od-321-stainless-4-foot-length","title":"1.500\" OD x 18ga (0.049\") Round Tube - Polished OD - 321 Stainless - 4 Foot Length","description":"\u003cp\u003eAce Race Parts 321 Stainless Steel Tubing is manufactured in an ISO 9001 certified facility and is the highest quality and lowest price 321 Stainless Steel tubing available in the automotive, industrial, and marine markets today. Our 321 Stainless tube is manufactured to the ASTM A269 specification and offers a clean, high quality welding experience due to an extensive testing and inspection process prior to shipment. Our 321 Stainless tubing is an exceptional choice for high performance, lightweight, and high temperature exhaust systems and other automotive applications. \u003c\/p\u003e\n\u003cp\u003e321 Stainless tubing is available in outside diameter ranges from 1.500\" to 3.000\" and is available in convenient 4'-0\" lengths. With a high quality brushed finish on the outside of the tube, our 321 Stainless tubing offers a high quality welding experience and is ensured to fit perfectly with our 321 Stainless Mandrel Bends, 304 Stainless \u003ca rel=\"noopener noreferrer\" title=\"V-Band, V-Band Clamps, Exhaust V-Bands, V-Band Flanges\" href=\"https:\/\/www.aceraceparts.com\/collections\/v-bands\/stainless-steel\" target=\"_blank\"\u003eV-Band Clamps \u0026amp; Flanges\u003c\/a\u003e, 304 and 321 Stainless \u003ca rel=\"noopener noreferrer\" title=\"Exhaust Bellow, Flex Coupling, Exhaust Coupling, Flex Bellows\" href=\"https:\/\/www.aceraceparts.com\/collections\/flex-couplings\" target=\"_blank\"\u003eFlex Bellows and Flex Bellows\u003c\/a\u003e, Stainless \u003ca rel=\"noopener noreferrer\" title=\"O2 Sensor Bungs, Bung Plugs, Bungs\" href=\"https:\/\/www.aceraceparts.com\/collections\/o2-sensor-bungs\/O2-Bungs\" target=\"_blank\"\u003eBungs\u003c\/a\u003e, and Stainless \u003ca rel=\"noopener noreferrer\" title=\"Exhaust Flange, Exhaust Flanges, Stainless Exhaust Flanges, Exhaust Gaskets\" href=\"https:\/\/www.aceraceparts.com\/collections\/exhaust-turbo-inlet-turbo-outlet-header-exhaust-flanges\" target=\"_blank\"\u003eExhaust Flanges\u003c\/a\u003e. \u003cbr\u003e\u003c\/p\u003e\n\u003ch3 style=\"text-align: center;\"\u003e\u003cspan\u003eWHAT IS 321 STAINLESS STEEL?\u003c\/span\u003e\u003c\/h3\u003e\n\u003cp\u003e321 Stainless Steel, like 304 Stainless Steel, is a low carbon, chromium nickel alloy with good intergranular corrosion resistance. 304 Stainless has good corrosion resistance up to 1,562°F (850°C); whereas, 321 Stainless allows for a higher temperature limit, including long term exposure to high temperatures, up to 1,652°F (900°C) due to the addition of Titanium, which acts as a stabilizer. 321 Stainless Steel's main advantage over 304 Stainless Steel in high temperature environments is that 321 Stainless offers better resistance to stress fractures. This higher resistance to stress fractures has advantages in automotive applications where differences in the Coefficient of Thermal Expansion (heat-related expansion and contraction which occurs at different rates) are greatest — typically between the engine and the manifold(s). 321 Stainless is better suited to handle this type of heat-related stress, as compared to 304 Stainless. While 304 Stainless is suitable for a wide variety of automotive applications, 321 Stainless is the superior choice for high temperature applications, and especially applications that see long term exposure to high temperatures like race cars, and offers a higher resistance to stress fractures and heat-related corrosion. For welding 321 Stainless Steel (including welding 321 Stainless to 304 Stainless) we recommend ER347 Filler Rod.\u003cbr\u003e\u003c\/p\u003e","brand":"Ace Race Parts","offers":[{"title":"Default Title","offer_id":41614109442111,"sku":"20197-1","price":75.0,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0972\/8304\/files\/Tube-2020-750x_5c8bb43c-b2fb-4338-8113-7f15e63e70e8.jpg?v=1715359588"},{"product_id":"1-625-od-x-16ga-0-065-round-tube-polished-od-321-stainless-4-foot-length","title":"1.625\" OD x 16ga (0.065\") Round Tube - Polished OD - 321 Stainless - 4 Foot Length","description":"\u003cp\u003eAce Race Parts 321 Stainless Steel Tubing is manufactured in an ISO 9001 certified facility and is the highest quality and lowest price 321 Stainless Steel tubing available in the automotive, industrial, and marine markets today. Our 321 Stainless tube is manufactured to the ASTM A269 specification and offers a clean, high quality welding experience due to an extensive testing and inspection process prior to shipment. Our 321 Stainless tubing is an exceptional choice for high performance, lightweight, and high temperature exhaust systems and other automotive applications. \u003c\/p\u003e\n\u003cp\u003e321 Stainless tubing is available in outside diameter ranges from 1.500\" to 3.000\" and is available in convenient 4'-0\" lengths. With a high quality brushed finish on the outside of the tube, our 321 Stainless tubing offers a high quality welding experience and is ensured to fit perfectly with our 321 Stainless Mandrel Bends, 304 Stainless \u003ca rel=\"noopener noreferrer\" title=\"V-Band, V-Band Clamps, Exhaust V-Bands, V-Band Flanges\" href=\"https:\/\/www.aceraceparts.com\/collections\/v-bands\/stainless-steel\" target=\"_blank\"\u003eV-Band Clamps \u0026amp; Flanges\u003c\/a\u003e, 304 and 321 Stainless \u003ca rel=\"noopener noreferrer\" title=\"Exhaust Bellow, Flex Coupling, Exhaust Coupling, Flex Bellows\" href=\"https:\/\/www.aceraceparts.com\/collections\/flex-couplings\" target=\"_blank\"\u003eFlex Bellows and Flex Bellows\u003c\/a\u003e, Stainless \u003ca rel=\"noopener noreferrer\" title=\"O2 Sensor Bungs, Bung Plugs, Bungs\" href=\"https:\/\/www.aceraceparts.com\/collections\/o2-sensor-bungs\/O2-Bungs\" target=\"_blank\"\u003eBungs\u003c\/a\u003e, and Stainless \u003ca rel=\"noopener noreferrer\" title=\"Exhaust Flange, Exhaust Flanges, Stainless Exhaust Flanges, Exhaust Gaskets\" href=\"https:\/\/www.aceraceparts.com\/collections\/exhaust-turbo-inlet-turbo-outlet-header-exhaust-flanges\" target=\"_blank\"\u003eExhaust Flanges\u003c\/a\u003e. \u003cbr\u003e\u003c\/p\u003e\n\u003ch3 style=\"text-align: center;\"\u003e\u003cspan\u003eWHAT IS 321 STAINLESS STEEL?\u003c\/span\u003e\u003c\/h3\u003e\n\u003cp\u003e321 Stainless Steel, like 304 Stainless Steel, is a low carbon, chromium nickel alloy with good intergranular corrosion resistance. 304 Stainless has good corrosion resistance up to 1,562°F (850°C); whereas, 321 Stainless allows for a higher temperature limit, including long term exposure to high temperatures, up to 1,652°F (900°C) due to the addition of Titanium, which acts as a stabilizer. 321 Stainless Steel's main advantage over 304 Stainless Steel in high temperature environments is that 321 Stainless offers better resistance to stress fractures. This higher resistance to stress fractures has advantages in automotive applications where differences in the Coefficient of Thermal Expansion (heat-related expansion and contraction which occurs at different rates) are greatest — typically between the engine and the manifold(s). 321 Stainless is better suited to handle this type of heat-related stress, as compared to 304 Stainless. While 304 Stainless is suitable for a wide variety of automotive applications, 321 Stainless is the superior choice for high temperature applications, and especially applications that see long term exposure to high temperatures like race cars, and offers a higher resistance to stress fractures and heat-related corrosion. For welding 321 Stainless Steel (including welding 321 Stainless to 304 Stainless) we recommend ER347 Filler Rod.\u003cbr\u003e\u003c\/p\u003e","brand":"Ace Race Parts","offers":[{"title":"Default Title","offer_id":41614110523455,"sku":"20198","price":79.0,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0972\/8304\/files\/Tube-2020-750x_5c8bb43c-b2fb-4338-8113-7f15e63e70e8.jpg?v=1715359588"},{"product_id":"1-750-od-x-18ga-0-049-round-tube-polished-od-321-stainless-4-foot-length","title":"1.750\" OD x 18ga (0.049\") Round Tube - Polished OD - 321 Stainless - 4 Foot Length","description":"\u003cp\u003eAce Race Parts 321 Stainless Steel Tubing is manufactured in an ISO 9001 certified facility and is the highest quality and lowest price 321 Stainless Steel tubing available in the automotive, industrial, and marine markets today. Our 321 Stainless tube is manufactured to the ASTM A269 specification and offers a clean, high quality welding experience due to an extensive testing and inspection process prior to shipment. Our 321 Stainless tubing is an exceptional choice for high performance, lightweight, and high temperature exhaust systems and other automotive applications. \u003c\/p\u003e\n\u003cp\u003e321 Stainless tubing is available in outside diameter ranges from 1.500\" to 3.000\" and is available in convenient 4'-0\" lengths. With a high quality brushed finish on the outside of the tube, our 321 Stainless tubing offers a high quality welding experience and is ensured to fit perfectly with our 321 Stainless Mandrel Bends, 304 Stainless \u003ca rel=\"noopener noreferrer\" title=\"V-Band, V-Band Clamps, Exhaust V-Bands, V-Band Flanges\" href=\"https:\/\/www.aceraceparts.com\/collections\/v-bands\/stainless-steel\" target=\"_blank\"\u003eV-Band Clamps \u0026amp; Flanges\u003c\/a\u003e, 304 and 321 Stainless \u003ca rel=\"noopener noreferrer\" title=\"Exhaust Bellow, Flex Coupling, Exhaust Coupling, Flex Bellows\" href=\"https:\/\/www.aceraceparts.com\/collections\/flex-couplings\" target=\"_blank\"\u003eFlex Bellows and Flex Bellows\u003c\/a\u003e, Stainless \u003ca rel=\"noopener noreferrer\" title=\"O2 Sensor Bungs, Bung Plugs, Bungs\" href=\"https:\/\/www.aceraceparts.com\/collections\/o2-sensor-bungs\/O2-Bungs\" target=\"_blank\"\u003eBungs\u003c\/a\u003e, and Stainless \u003ca rel=\"noopener noreferrer\" title=\"Exhaust Flange, Exhaust Flanges, Stainless Exhaust Flanges, Exhaust Gaskets\" href=\"https:\/\/www.aceraceparts.com\/collections\/exhaust-turbo-inlet-turbo-outlet-header-exhaust-flanges\" target=\"_blank\"\u003eExhaust Flanges\u003c\/a\u003e. \u003cbr\u003e\u003c\/p\u003e\n\u003ch3 style=\"text-align: center;\"\u003e\u003cspan\u003eWHAT IS 321 STAINLESS STEEL?\u003c\/span\u003e\u003c\/h3\u003e\n\u003cp\u003e321 Stainless Steel, like 304 Stainless Steel, is a low carbon, chromium nickel alloy with good intergranular corrosion resistance. 304 Stainless has good corrosion resistance up to 1,562°F (850°C); whereas, 321 Stainless allows for a higher temperature limit, including long term exposure to high temperatures, up to 1,652°F (900°C) due to the addition of Titanium, which acts as a stabilizer. 321 Stainless Steel's main advantage over 304 Stainless Steel in high temperature environments is that 321 Stainless offers better resistance to stress fractures. This higher resistance to stress fractures has advantages in automotive applications where differences in the Coefficient of Thermal Expansion (heat-related expansion and contraction which occurs at different rates) are greatest — typically between the engine and the manifold(s). 321 Stainless is better suited to handle this type of heat-related stress, as compared to 304 Stainless. While 304 Stainless is suitable for a wide variety of automotive applications, 321 Stainless is the superior choice for high temperature applications, and especially applications that see long term exposure to high temperatures like race cars, and offers a higher resistance to stress fractures and heat-related corrosion. For welding 321 Stainless Steel (including welding 321 Stainless to 304 Stainless) we recommend ER347 Filler Rod.\u003cbr\u003e\u003c\/p\u003e","brand":"Ace Race Parts","offers":[{"title":"Default Title","offer_id":41614119862335,"sku":"20199-1","price":88.0,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0972\/8304\/files\/Tube-2020-750x_5c8bb43c-b2fb-4338-8113-7f15e63e70e8.jpg?v=1715359588"}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0972\/8304\/collections\/Tube-2020-750x_cafea985-d52f-46c9-85aa-a060dbb3db36.jpg?v=1664386248","url":"https:\/\/www.aceraceparts.com\/collections\/tube-321-stainless-steel\/dhlrestricted.oembed","provider":"Ace Race Parts","version":"1.0","type":"link"}