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:

Connection Type Butt Weld / Threaded / Socket Weld
Flexibility Rigid
Thread Type NPT / BSP (for threaded pipes)
Diameter 6 mm to 600 mm
Bend Radius As per application, standard pipe bending
Tolerance 0.1 mm
Sealing Type Metal to Metal
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321 Stainless Steel Pipe Price And Quantity

Price 300.0 INR/Piece
Minimum Order Quantity 1 Piece

321 Stainless Steel Pipe Product Specifications

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

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

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 $1000^\circ\text{F}$ ( $538^\circ\text{C}$ ).
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 ( $427^\circ\text{C}$ to $816^\circ\text{C}$ / $800^\circ\text{F}$ to $1500^\circ\text{F}$ ).
High-Temperature Performance: Retains high creep strength, stress rupture capability, and scaling resistance in continuous service up to $900^\circ\text{C}$ ( $1650^\circ\text{F}$ ).
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: $\ge 515\text{ MPa}$ ( $75\text{ ksi}$ )
Yield Strength (0.2% Proof): $\ge 205\text{ MPa}$ ( $30\text{ ksi}$ )
Elongation: $\ge 40\%$
Hardness: $\le 217\text{ HB}$ / $95\text{ HRB}$

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 ( $0.04\text{--}0.10\%$ ) designed for even higher creep strength at temperatures above $537^\circ\text{C}$ ( $1000^\circ\text{F}$ ).

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