Everything You Need To Know About Stainless Steel 321 Pipe

Key Properties of Stainless Steel 321

Stainless steel 321 is an austenitic chromium-nickel stainless steel containing Titanium which is recommended for parts fabricated by welding which cannot subsequently be annealed. It offers excellent corrosion resistance to intergranular corrosion after welding. Type 321 is a stabilized austenitic stainless steel similar to type 304 but with a titanium addition. This titanium addition reduces or prevents carbide precipitation during welding and in 800 - 1500 °F (427 - 816 °C) service. It also improves the elevated temperature properties of the alloy. Type 321 provides excellent resistance to oxidation and corrosion and possesses good creep strength. Stainless steel 321 is therefore the stainless steel material of choice for applications in working environments up to 900° C. A drawback of Type 321 is that the titanium does not transfer well across a high temperature arc, so it is not recommended as a welding consumable.

Type 321 offers excellent resistance to oxidation and chemical corrosion. The alloy also possesses good creep strength. It can be readily formed or drawn though it is more difficult to form than other austenitic grades. The titanium content is typically five times that of the carbon content, and this addition reduces carbide precipitation during welding and improves elevated working temperature properties. Type 321 has usage in a wide range of applications including Oil & Gas, petrochemical, aerospace and general industry. Additionally, 321 stainless steel shouldn’t be used in cosmetic architecture because it does not polish well.

What are Stainless Steel 321 Pipes?

Grade 321 is an austenitic alloy, which is stabilized with the help of titanium. The Stainless Steel 321 Pipe provides excellent corrosion resistance properties and acts as a sterilizing agent. This grade was initially designed to combat intergranular corrosion, which the 304 grade was susceptible to in various ranges. The Stainless Steel 321 Pipe possesses excellent mechanical properties. These pipes have a density of 8027 gm/cm3 and can be elongated by 40% in various applications. With a melting point between 1398-1146 degrees C, the Stainless Steel 321 Tube is very durable in nature. These tubes have minimum yield strength of 205Mpa and tensile strength of a minimum of 515Mpa. The 321 Exhaust Tubing is extremely strong and doesn’t bend easily. These tubings have a hardness of 217 Brinell and can handle a lot of heat and smoke. We are the leading 321 Stainless Steel Tubing suppliers in China. We thrive to produce the best products, which are available to all at reasonable rates.

The 321 UNS S32100 ERW Pipe is produced through a welded joint in their cross-section. These pipes are joined together with electricity and are very long-lasting. The 1.4541 SS 321 Seamless Tube is non-magnetic in nature and cannot be hardened by hot-rolling procedures. These tubes also have excellent low-temperature working properties. The AISI 321 Schedule 40 Pipe is made up of thin walls. These pipes are preferred for low-pressure applications but work well in high-pressure systems as well. We belong to the group of 321 Tubing suppliers who can customize all our products in different shapes and sizes as per our client's requirements.

The ASTM A312 TP321 Pipe is the most preferred pipe shape amongst the different shapes of pipe available. This pipe may either be welded or seamless and is used to transports fluids and gases. The SA 312 TP 321 Rectangular Pipe is manufactured with a rectangular cross-section. These pipes are extremely strong and require low maintenance. For structural purposes and maintenance the w.nr. 1.4541 Square Pipe is used in many applications. These pipes have a modulus of elasticity in the tension of 193 Gpa. The pipe can also be easily fitted in inaccessible spots. The SS grade 1.4541 Polished Pipe is produced after the cold-rolling process. These pipes can be annealed or polished internally as well as externally depending on various parameters. If you have any queries or want to know more about the Stainless Steel 321 Pipe, contact us.

Specifications of stainless steel 321 seamless pipe

Seamless Pipes & Tubes Size	1 / 8" NB - 24" NB
Specifications	ASTM A/ASME SA213, A249, A269, A312, A358, A790
Standard	ASTM, ASME
Techniques	Hot-rolled, cold-drawn
Length	5.8M,6M & Required Length
Outer Diameter	6.00 mm OD up to 914.4 mm OD, Sizes up to 24” NB
Thickness	0.3mm – 50 mm, SCH 5, SCH10, SCH 40, SCH 80, SCH 80S, SCH 160, SCH XXS, SCH XS
Schedule	SCH20, SCH30, SCH40, STD, SCH80, XS, SCH60, SCH80, SCH120, SCH140, SCH160, XXS
Types	Seamless Pipes
Form	Round, Square, Rectangle, Hydraulic, Honed Tubes
End	Plain End, Beveled End, Treaded

Key Mechanical Properties of stainless steel 321 pipes

Corrosion Resistance: Like 304, stainless steel 321 pipes exhibit good all-around corrosion resistance. It was developed for usage in the 1800–1500 °F (416–816 °C) chromium carbide precipitation range, where unstabilized alloys, such as 304, are vulnerable to intergranular assault. The alloy 321 can be used in pure phosphoric acid at low temperatures, most diluted organic acids at moderate temperatures, up to 10% diluted solutions at high temperatures, and most diluted organic acids. Stainless steel 321 tubes resist polythionic acid stress corrosion cracking in hydrocarbon service. It can also be used in fluoride- or chloride-free caustic solutions at mild temperatures. Even at low concentrations, SS 321 does not function well in sulfuric acid service or chloride solutions.

Machining: The same hard, stringy chips will be produced by 304 stainless steel and 321 stainless steel. Slow speeds and heavy feeds will reduce this alloy’s tendency to work harder. 321 All typical welding methods, including submerged arc, work well for welding stainless steel. Most typically, AWS E/ER 347 or E/ER 321 are considered suitable weld fillers. The main distinction between this alloy and 304 and 304L stainless steel is the addition of titanium, which eliminates or delays carbide precipitation during welding.

Annealing: Annealing at air-cooled temperatures of 1800–2000°F (928–1093°C). Maximum ductility will be obtained using this procedure. See the comment on settled anneal under corrosion for the highest level of corrosion resistance. Heat treatment is not used to harden this stainless steel. Cold reduction is the only way to get high attributes.

Techniques for Hot and Cold Work: Forging, upsetting, and other hot work processes call for working temperatures of 2100-2300 degrees F (1149-1260 degrees C). Work with this stainless steel at no less than 1700 degrees Fahrenheit (927 degrees C). To maintain the highest level of corrosion resistance, the material must either be thoroughly annealed or water quenched after working. Compared to 304 stainless steel, this material requires greater initial stresses, yet despite this, it is a little bit more brittle and ductile and can be spun, drawn, stamped, and blanked.

Applications of 321 Stainless Steel Tube

321 stainless steel tube is used in so many different applications because of its resistance to corrosion and ability to withstand high temperatures in harsh environments. They are used to manufacture a range of components in the transportation industries and are frequently used in equipment that handles corrosive or harmful chemicals. Below, we outline a few key applications of 321 stainless steel.

Aerospace industry: To manufacture exhaust systems and heat exchangers.

Automotive industry: In catalytic converters and exhaust systems.

Chemical processing industry: For pipes, tanks and valves in chemical handling.

Food processing industry: To manufacture food processing equipment.

Medical industry: In medical equipment like dental tools and surgical implants.

Petrochemical industry: In boilers, heat exchangers, and pipes.