321 Stainless Steel Pipe

Name: 321 Stainless Steel Pipe
Brand: JAYANT IMPEX
Price: 300.0 INR
Availability: InStock

300.0 INR/Piece

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Product Details:

Bend Radius As per application, standard pipe bending
Thread Type NPT / BSP (for threaded pipes)
Flexibility Rigid
Diameter 6 mm to 600 mm
Connection Type Butt Weld / Threaded / Socket Weld
Tensile Strength 515 MPa minimum
Sealing Type Metal to Metal
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321 Stainless Steel Pipe Price And Quantity

Minimum Order Quantity 1 Piece
Price 300.0 INR/Piece

321 Stainless Steel Pipe Product Specifications

Thickness 1 mm - 20 mm
Flexibility Rigid
Diameter 6 mm to 600 mm
Thread Type NPT / BSP (for threaded pipes)
Application Fluid Transport, Structural, Heat Exchangers
Material Grade 321 Stainless Steel
Material Stainless Steel
Outer Diameter 6 mm - 600 mm
Connection Type Butt Weld / Threaded / Socket Weld
Surface Treatment Polished / Pickled
Section Shape Round
Bend Radius As per application, standard pipe bending
Yield Strength 205 MPa minimum
Coating Type Uncoated / As per request
Standard ASTM A312 / A213
Connection Welded / Seamless
Tolerance 0.1 mm
Color Silver / Metallic
Rated Pressure Up to 400 Bar (depending on size and thickness)
Temperature Range -196C to 800C
Tensile Strength 515 MPa minimum
Shape Round
Usage Industrial, Chemical, Petrochemical, Construction
Product Type Stainless Steel Pipe
Sealing Type Metal to Metal
Length Standard & Customized (up to 6 meters or as required)

Corrosion Resistance Excellent, especially against intergranular corrosion
End Protection Plastic Caps / Beveled Ends
Packing Detail Wooden Cases / Bundles with Strapping
Heat Treatment Annealed
Density 8.0 g/cm3
Finish Matt / Bright / Mirror Finish (Optional)
Hardness 217 HB Max
Processing Service Cutting, Bending, Welding, Punching, Decoiling

Product Description

Technical Overview: AISI 321 vs. Standard Austenitics

Titanium Stabilization: Ti content is tied to carbon ( $text{Ti} = 5 times (text{C} + text{N}) text{ min}$ up to $0.70%$ ), preferentially forming titanium carbides rather than chromium carbides during heating.
Welding Advantage: Eliminates the need for post-weld annealing when operating in elevated temperature or corrosive service environments.
High-Temperature Performance: Higher creep rupture strength and stress rupture properties compared to SS 304 or SS 304L above $1000^circtext{F}$ ( $538^circtext{C}$ ).
Primary Applications: Aircraft exhaust manifolds, expansion joints, furnace components, heat exchanger tubes, and high-temperature chemical process lines.

Key Properties

Intergranular Corrosion Resistance: The titanium addition binds with carbon to form titanium carbides instead of chromium carbides. This prevents "weld decay" and intergranular corrosion in the critical temperature range ( $427^circtext{C}$ to $816^circtext{C}$ / $800^circtext{F}$ to $1500^circtext{F}$ ).
High-Temperature Performance: Retains high creep strength, stress rupture capability, and scaling resistance in continuous service up to $900^circtext{C}$ ( $1650^circtext{F}$ ).
Weldability & Formability: Highly weldable using standard fusion methods (typically welded using 347 filler wire). Unlike Grade 304, it does not require post-weld annealing to restore corrosion resistance.
Non-Magnetic: Austenitic structure (non-magnetic in the annealed state, though it can become slightly magnetic when cold-worked).

Chemical Composition (Typical Weight %)

Element	Content (%)
Chromium (Cr)	17.0 19.0%
Nickel (Ni)	9.0 12.0%
Titanium (Ti)	$5 times text{C min}$ (up to 0.70% max)
Carbon (C)	0.08% max (for 321H: 0.04 0.10%)
Manganese (Mn)	2.0% max
Silicon (Si)	1.0% max
Iron (Fe)	Balance

Common Mechanical Properties (Annealed)

Tensile Strength: $ge 515text{ MPa}$ ( $75text{ ksi}$ )
Yield Strength (0.2% Proof): $ge 205text{ MPa}$ ( $30text{ ksi}$ )
Elongation: $ge 40%$
Hardness: $le 217text{ HB}$ / $95text{ HRB}$

Typical Applications

Aerospace & Automotive: Aircraft exhaust manifolds, jet engine parts, engine headers, and catalytic converter tubing.
Oil, Gas & Petrochemical: Refinery equipment, flare stacks, thermal oxidizers, and high-temperature chemical transport lines.
Power Generation: Boiler superheaters, steam headers, and furnace components.
Industrial Equipment: Heat exchanger tubing, expansion joints, and bellows.

Common Specifications & Product Types

Specifications: ASTM A312 / ASME SA312 (Seamless, Welded, and Heavily Cold Worked Pipe), ASTM A269 (Tubing).
321 vs. 321H: Grade 321H (UNS S32109) has a higher controlled carbon content ( $0.04text{--}0.10%$ ) designed for even higher creep strength at temperatures above $537^circtext{C}$ ( $1000^circtext{F}$ ).

Premium Performance and Durability

321 Stainless Steel Pipe is specifically designed for longevity and reliability in demanding environments. Its excellent resistance to intergranular corrosion, superior mechanical properties, and high-temperature tolerance ensure performance even under rigorous industrial conditions. The pipes offer outstanding structural integrity and remain robust up to 800C, making them ideal for fluid transport, heat exchangers, and structural uses.

Versatile Finishes and Customization

Choose from a range of finishes such as matt, bright, or mirror to suit your project's aesthetic and functional requirements. The pipes support diverse processing services like cutting, bending, welding, punching, and decoiling, allowing for seamless integration into your specific application. Custom diameters, lengths, and end protections are available to meet unique operational demands.

Secure Packing and Reliable Delivery

Each 321 Stainless Steel Pipe undergoes meticulous packaging in wooden cases or securely strapped bundles, safeguarding its finish and structural integrity during storage and transit. End protection with plastic caps or beveled ends further prevents damage, ensuring that the pipes arrive in optimum condition, ready for immediate installation in your facility.

FAQ's of 321 Stainless Steel Pipe:

Q: How is end protection ensured for 321 Stainless Steel Pipes during shipping?

A: To protect the pipe ends from damage and contamination, 321 Stainless Steel Pipes are supplied with either durable plastic caps or precisely beveled ends. Additionally, the pipes are carefully packed in wooden cases or bundled and strapped, providing comprehensive protection throughout handling and transport.

Q: What are the main applications of 321 Stainless Steel Pipe?

A: These pipes are widely used in industrial sectors such as fluid transport, heat exchangers, petrochemical plants, structural frameworks, and construction due to their robust corrosion resistance, high tensile strength, and adaptability to various connection types and processing services.

Q: When should I choose a mirror finish over a matt or bright finish for these pipes?

A: A mirror finish is ideal for environments needing enhanced aesthetic appeal or additional ease of cleaning, such as in architectural or sanitary applications. Matt or bright finishes are preferred for mechanical strength and cost-efficiency in industrial settings.

Q: Where can 321 Stainless Steel Pipes be installed?

A: These pipes are suitable for installation in a range of environments, including chemical plants, refineries, construction sites, and industrial facilities, especially where exposure to corrosive substances or high temperatures is expected.

Q: What are the benefits of using 321 Stainless Steel Pipe over other stainless grades?

A: 321 Stainless Steel offers superior resistance to intergranular corrosion and excellent performance at elevated temperatures, making it more suitable than many other stainless grades for demanding industrial applications. Its durability also translates to lower maintenance and longer service life.

Q: How does the processing service enhance the utility of 321 Stainless Steel Pipes?

A: The pipes can be custom-processed by cutting, bending, welding, punching, or decoiling, allowing them to be tailored precisely to fit specific engineering designs or installation requirements, thereby improving operational efficiency and reducing waste.

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