Stainless Steel 321 Pipes | 321H SS Seamless Pipes Supplier

Name: Stainless Steel 321/321H Pipes
Brand: Solitaire Overseas

Stainless Steel 321 and 321H Pipes Supplier

Solitaire Overseas excels as a premier stainless steel 321 pipe supplier, providing top-quality Stainless Steel Pipes & tubes. Our alloy 321 pipe products are produced to satisfy strict national and international requirements. We provide a wide choice of SS321 and SS321 materials in many diameters, wall thicknesses, lengths, and sizes. Our products are offered at reasonable market pricing for both national and worldwide customers and available in customized versions to suit specific needs.

What is Stainless Steel 321 Pipe?

Stainless steel 321 pipe is a titanium-stabilized austenitic stainless steel with great corrosion resistance, particularly against intergranular corrosion at high temperatures (427°C - 816°C). Common problems in unstabilized grades like 304, chromium carbide precipitation is avoided by this stabilization.

Main characteristics of 321 stainless steel include:

Excellent resistance against both general and intergranular corrosion.

Excellent creep and stress rupture strength together with oxidation resistance up to 816°C.

Good toughness at low temperatures; minimum yield strength of 205 MPa; minimum tensile strength of 515 MPa; density of 8027 kg/m³.

Melting point between 1398-1446°C and hardness of 217 Brinell yields durability.

Formability:Elongation of 40%.

There are both seamless and welded pipe and tube versions of 321 stainless steel. While welded pipes give great creep resistance and help to address post-welding issues, seamless tubing provides outstanding strength and durability. Demanding uses include boilers, jet engine components, and exhaust systems—including 321 exhaust tubing.

Stainless Steel 321H Seamless Pipes

Stainless Steel 321H pipe is a stabilized austenitic stainless steel designed for high-temperature use (427-816°C / 800-1500°F). It has higher carbon content. It resists carbide precipitation, remains non-magnetic in the annealed condition, and can be hardened by cold working.

Types of Stainless Steel 321 Pipes

Solitaire Overseas has a wide range of Stainless Steel 321 Pipes for specific industrial use. Our SS 321 pipes are recognized for their excellent heat resistance, superior strength, and high performance in extreme environments. Below is a list of types of SS 321 Pipes we offer:

Stainless Steel 321 Seamless Pipe

Built from one piece of steel, the SS 321 Seamless Pipe lacks joints or welds. A pipe produced by this manufacturing process has exceptional resistance to pressure and corrosion, strength, and longevity. Perfect for use in boilers, jet engines, exhaust systems, and more. These pipes ideal for high-temperature applications—perform remarkably well between 800°C and 1500°C. Though the production method results in somewhat more cost, seamless pipes offer exceptional dependability and long service life. At Solitaire Overseas, we guarantee that our flawless pipes are created with the most modern technologies for maximum quality standards.

Stainless Steel 321 Welded Pipe

Our Stainless Steel 321 Welded Pipes are known for their excellent resistance to post-weld carburization, pitting, and corrosion. Made by connecting steel strips with electric resistance welding (ERW), these pipes retain remarkable mechanical strength and creep resistance. For many different industrial uses where structural integrity and corrosion resistance are absolutely vital, these welded pipes are perfect. Non-magnetic and retaining strength even at cryogenic temperatures, the 321 UNS S32100 ERW Pipe is Among the few Indian providers able to provide tailored solutions for welded pipes depending on your particular needs.

321 Round Pipe

The ASTM A312 TP 321 Round Pipe is the most commonly used pipe shape due to its versatility and efficient fluid and gas transport properties. Round pipes are utilized extensively in sectors like petrochemicals, power generation, and aerospace both in seamless and welded forms. Their round cross-section guarantees a consistent pressure distribution, so they are perfect for both low- and high-pressure uses. These pipes are available at Solitaire Overseas in polished, annealed, and bespoke surface treatments among other schedules and finishes.

Types of Stainless Steel 321 Pipe and 321H Seamless Tubing

Stainless Steel 321 Seamless Tubes
SS TP 321H Seamless Tubes
Stainless Steel 321 Tubes
SS 1.4878 Seamless Tubes
Stainless Steel 321 Cold Drawn Tubes
UNS S32109 Stainless Steel Seamless Tubing
Stainless Steel 321H Seamless Tube
SS TP321 Seamless Tubes

SS TP321H Cold Drawn Tubes
AISI SS TP 321H Tubing
Stainless Steel 321 Tubing
SS 1.4541 Seamless Tubing
Stainless Steel 321H Seamless Tubing
ASTM A213 Stainless Steel 321H Seamless Tubes
321H Stainless Steel Seamless Tubes
ASTM A213 TP321 SS Seamless Tubes

CONTACT US TO GET QUOTE FOR YOUR REQUIREMENT.

Our global reach guarantees on-time delivery, cost-effectiveness, and full compliance with industry standards, so your production stays on track.

SS Stainless Steel 321/321H Pipes Specifications

Specification

Specifications

ASTM A312, A358 / ASME SA312, SA358

Dimensions

ASTM, ASME and API

Seamless Pipe Size

1/2″ NB – 16″NB

ERW Pipe Size

1/2″ NB – 24″ NB

EFW Pipe Size :

6″ NB – 100″ NB

Outside Diameter :

6.00 mm OD up to 914.4 mm OD, Sizes up to 24” NB available

Length

Single Random, Double Random & Required Length

Thickness

0.3mm – 50 mm

Schedule

SCH20, SCH30, SCH40, STD, SCH80, XS, SCH60, SCH120, SCH140, SCH160, XXS

Type

Seamless, Welded, ERW, EFW

Form

Round Pipes, Square Pipes, Rectangular Pipe

End

Plain End, Beveled End, Treaded

Stainless Steel 321/321H Pipes Equivalent Grades

STANDARD	WERKSTOFF NR.	UNS	JIS	EN
SS 321	1.4541	S32100	SUS 321	X6CrNiTi18-10
SS 321H	1.4878	S32109	SUS 321H	X12CrNiTi18-9

SS 321/321H Pipes Chemical Composition

Element	SS 321	SS 321H
C	0.08 max	0.04 – 0.10
Mn	2.0 max	2.0 max
Si	1.0 max	1.0 max
P	0.045 max	0.045 max
S	0.030 max	0.030 max
Cr	17.00 - 19.00	17.00 - 19.00
N	0.10 max	0.10 max
Ni	9.00 - 12.00	9.00 – 12.00
Ti	5(C+N) – 0.70 max	4(C+N) – 0.70 max

Stainless Steel 321/321H Pipes Mechanical & Physical Properties

Element	SS 321/321H
Density	8.0 g/cm3
Melting Point	1457 °C (2650 °F)
Tensile Strength	Psi – 75000 , MPa – 515
Yield Strength (0.2%Offset)	Psi – 30000 , MPa – 205
Elongation	35 %

Stainless Steel 321/321H Pipe Application

SS 321 Pipes in various Application Industries

Food Processing Industry

Fabrication Industry

Oil and Gas Industry

Chemical Industry

Plumbing

General Purpose Applications

Heating

Water Supply Systems

Power Plant

Paper & Pulp Industry

Why Choose Us for Your 321/321H Pipe Needs?

At Solitaire Overseas, we are a trusted supplier of Stainless Steel 321 and 321H Pipes, known for our commitment to quality and customer satisfaction. Here’s why you should choose us:

Premium Quality: Our 321/321H pipes are made from high-quality materials and undergo strict quality checks to ensure top performance.
Custom Solutions: We offer customizable pipes in various sizes, shapes, and finishes to meet your specific needs.
Competitive Pricing: We provide high-quality products at affordable prices, ensuring value for your investment.
Fast Delivery: With efficient logistics, we guarantee on-time delivery to keep your projects on track.
Expertise: With years of experience, our knowledgeable team provides expert support and advice for your pipe requirements.
Global Reach: We serve clients worldwide across industries like aerospace, petrochemicals, and power generation.

FAQ

What is the difference between SS 321 and 321H?

The key difference between SS 321 and 321H is carbon content: SS 321 has a maximum of 0.08% carbon, while 321H ranges from 0.04% to 0.10%. Both have similar compositions.

What is a 321 stainless steel tube?

321 stainless steel is a heat-resistant grade known for its good corrosion resistance and strength at high temperatures. This austenitic alloy maintains toughness and overall strength even at cryogenic temperatures, making it suitable for a range of high-temperature applications.

What is type 321 stainless steel?

321 stainless steel, a titanium-stabilized austenitic grade, offers similar corrosion resistance to 304/304L.

Is 321 stainless better than 316?

The best choice between 321 and 316 stainless steel depends on your needs. For high-temperature strength and weld stability, 321 is the better option. If corrosion resistance in harsh environments like chemical processing or marine settings is paramount, 316 steel is the preferred choice.