Stainless Steel 321H Pipes Manufacturer, Supplier & Exporter
What are Stainless Steel 321H Pipes?
Stainless Steel 321H Pipes is a high carbon titanium-stabilized austenitic stainless steel grade ideal for high temperature application. 321H SS pipe offers excellent protection against corrosion like intergranular corrosion and oxidation, as well creep & stress rupture, making them best in applications such as heat exchangers, boilers, pressure vessels, and in oil and gas, petrochemical and other power generation facilities. They are available in various forms such as SS ASTM A312 TP321H Seamless Pipes, welded pipes, EFW pipe and AISI 321H Schedule 40 Pipe and perform up to 900°C.
Stainless Steel 321H Pipes Manufacturer & Supplier
We’re well-established as a leading manufacturer and supplier of the highest grade of quality SS 321H Stainless Steel Pipes that adhere to stringent industry standards such as ASTM, ASME and AISI specification. Our Stainless Steel Pipes offer a higher rate of strength as compared to standard 316 or 304. This type of stainless steel tube also shows a good resistance to oxidation for a prolonged usage, especially in high temperatures and hostile surroundings.
We stand out to be the most reckoned ASME SA312 SS 321H Pipes Supplier in India and have kept ready stocks of various varieties like seamless stainless steel 321H pipes, welded stainless steel 321H pipes, electric fusion welded steel pipes and also fabrication works as per required lengths or end conditions to suit the requirements of various industries and cater to timely deliveries.
Our product range includes:
- SS ASTM A312 TP321H Seamless Pipes
- AISI 321H Schedule 40 Pipe
- ASTM A358 Stainless Steel 321H EFW Pipe Supplier
- UNS S32109 stainless steel pipe
- SS 321H seamless pipe
- UNS S32109 stainless steel pipes
- Custom-sized industrial process pipes
- Heat exchanger and boiler tubes
Being an experienced SS 321H pipe manufacturer, we understand the operational challenges faced by industries such as power plants, petrochemical processing, oil & gas, chemical manufacturing, fertilizer plants, pulp & paper, marine engineering, pharmaceutical manufacturing, and food processing. Every pipe undergoes strict quality inspections to ensure reliable performance under extreme pressure and elevated temperatures.
What is Stainless Steel 321H?
Stainless Steel 321H is a higher carbon form of 321 stainless steel. Enhanced carbon level boosts the creep strength and allows 321H stainless steel to exhibit a good creep rupture strength at higher temperatures, and it can continuously operate from 500°C to 900°C.
Titanium added to 321H grade 321 enhances mechanical stability by controlling the formation of chromium carbide when exposed to heat or when welded. Consequently, UNS S32109 stainless steel pipes possess improved resistance to sensitization and intergranular corrosion as compared to standard grades.
As such, 321H SS seamless pipe is most often specified for projects which include heating cycles and thermal fatigue.
Types of Stainless Steel 321H Pipes We Supply
We offer an extensive range of 321H Stainless Steel Pipes suitable for various industrial applications.
• SS ASTM A312 TP321H Seamless Pipes
Manufactured without welds, these pipes provide outstanding pressure resistance, excellent dimensional accuracy, and enhanced corrosion resistance. They are preferred for critical pressure systems and high-temperature process lines.
• ASTM A358 Stainless Steel 321H EFW Pipe
Electric Fusion Welded (EFW) pipes are produced for larger diameters where superior weld integrity and strength are required. These pipes are extensively used in petrochemical plants, refineries, and power generation facilities.
• AISI 321H Schedule 40 Pipe
Schedule 40 pipes offer an excellent balance between wall thickness and flow efficiency. They are widely used in industrial piping systems, steam pipelines, and heat transfer applications.
• Welded Stainless Steel 321H Pipes
Manufactured using high-quality welding techniques, welded pipes offer an economical solution for medium-pressure industrial systems while maintaining excellent corrosion resistance.
• Custom Fabricated Pipes
We also manufacture customized pipe sizes, lengths, finishes, and wall thicknesses according to customer specifications and international project requirements.
Features & Benefits of Stainless Steel 321H Pipes
Our Stainless Steel 321H Pipes are manufactured to meet stringent international quality standards and are designed for dependable performance in challenging industrial environments.
- Superior High-Temperature Strength: The higher carbon content in 321H Stainless Steel Pipes improves creep resistance and provides better mechanical strength at elevated temperatures compared to standard Grade 321 stainless steel.
- Outstanding Oxidation Resistance: These pipes offer excellent resistance to oxidation in continuous service temperatures up to approximately 900°C, making them ideal for heat-intensive industrial applications.
- Excellent Corrosion Resistance: The titanium-stabilized composition minimizes carbide precipitation, providing superior protection against intergranular corrosion after welding.
- Excellent Weldability: Our SS ASTM A312 TP321H Seamless Pipes and welded pipes can be fabricated and welded using conventional stainless steel welding processes without significant loss of corrosion resistance.
- Long Service Life: Because of their excellent mechanical strength and corrosion resistance, UNS S32109 stainless steel pipes provide extended operational life with reduced maintenance requirements.
- Wide Size Availability: As a leading Stainless steel 321H pipe stockist, we maintain a broad inventory of pipe sizes, wall thicknesses, and schedules to support urgent industrial requirements.
Applications of Stainless Steel 321H Pipes
Because of their excellent high-temperature properties, Stainless Steel 321H Pipes are used across numerous industries.
- Petrochemical Industry: Ideal for process piping, catalyst systems, reformers, and hydrocarbon processing plants.
- Oil & Gas Industry: Used in offshore platforms, refineries, gas processing facilities, and pipeline systems requiring superior corrosion resistance.
- Power Generation: Widely installed in steam lines, superheaters, reheaters, and boiler tubing due to their exceptional heat resistance.
- Chemical Processing Plants: Suitable for transporting aggressive chemicals, acids, solvents, and high-temperature process fluids.
- Heat Exchangers: The excellent thermal conductivity and oxidation resistance make SS 321H seamless pipe suitable for shell-and-tube heat exchangers.
- Fertilizer Industry: Used in ammonia plants, urea production facilities, and other chemical manufacturing processes.
- Pulp & Paper Industry: Performs reliably in corrosive environments involving bleaching chemicals and process fluids.
- Marine & Offshore Engineering: Excellent resistance to seawater exposure and elevated temperatures makes these pipes suitable for marine piping systems.
- Pharmaceutical & Food Processing: The hygienic surface finish and corrosion resistance make these pipes suitable for sanitary process systems.
Stainless Steel 321H Pipe Specifications
| Specification | Details |
| Product | Stainless Steel 321H Pipes |
| Grade | 321H Stainless Steel |
| UNS Number | UNS S32109 |
| ASTM Standard | ASTM A312 TP321H |
| ASME Standard | ASME SA312 TP321H |
| EFW Standard | ASTM A358 |
| Pipe Type | Seamless, Welded, EFW, Fabricated |
| Outer Diameter | 6 mm – 610 mm |
| Wall Thickness | SCH 5 to SCH XXS |
| Length | Single Random, Double Random, Cut Length |
| End Type | Plain End, Beveled End, Threaded |
| Surface Finish | Annealed, Pickled, Polished, Bright Annealed |
| Testing | PMI, Hydro Test, Flattening, Eddy Current, IGC Test, NDT |
| Origin | India |
SS 321H Pipe Dimensions and Schedule Chart
We supply SS 321H pipe dimensions and schedule chart in accordance with ASME B36.10M and ASME B36.19M standards.
| Nominal Pipe Size | Outside Diameter | Available Schedules |
| ½” | 21.3 mm | SCH 5, 10, 40, 80 |
| ¾” | 26.7 mm | SCH 5, 10, 40, 80 |
| 1″ | 33.4 mm | SCH 5, 10, 40, 80, 160 |
| 2″ | 60.3 mm | SCH 10, 40, 80, XS |
| 4″ | 114.3 mm | SCH 10, 40, 80 |
| 6″ | 168.3 mm | SCH 10, 20, 40, 80 |
| 8″ | 219.1 mm | SCH 10, 20, 40 |
| 10″ | 273.0 mm | SCH 10, 20, 40 |
| 12″ | 323.9 mm | SCH 10, 20, 40 |
ASTM A312 TP321H Chemical Composition
The following table shows the typical ASTM A312 TP321H chemical composition.
| Element | Composition (%) |
| Carbon (C) | 0.04 – 0.10 |
| Chromium (Cr) | 17.0 – 19.0 |
| Nickel (Ni) | 9.0 – 12.0 |
| Manganese (Mn) | 2.00 Max |
| Silicon (Si) | 1.00 Max |
| Phosphorus (P) | 0.045 Max |
| Sulfur (S) | 0.030 Max |
| Titanium (Ti) | 5 × (C + N) to 0.70 Max |
| Nitrogen (N) | 0.10 Max |
| Iron (Fe) | Balance |
SS 321H Mechanical Properties
| Property | Value |
| Tensile Strength | 515 MPa Minimum |
| Yield Strength (0.2% Offset) | 205 MPa Minimum |
| Elongation | 35% Minimum |
| Hardness | 95 HRB Maximum |
| Modulus of Elasticity | 193 GPa |
| Density | 8.0 g/cm³ |
Physical Properties of Stainless Steel 321H Pipes
| Property | Value |
| Density | 8.0 g/cm³ |
| Melting Range | 1398–1454°C |
| Thermal Conductivity (100°C) | 16.3 W/m·K |
| Electrical Resistivity | 0.72 µΩ·m |
| Specific Heat | 500 J/kg·K |
| Coefficient of Thermal Expansion | 16.5 µm/m·°C |
The excellent thermal stability of UNS S32109 stainless steel pipe allows it to maintain strength and corrosion resistance even during prolonged exposure to elevated temperatures.
Why Choose Us as Your SS 321H Pipe Supplier?
Selecting the right supplier is just as important as selecting the right material. We are committed to delivering products that meet international quality standards while providing dependable customer support.
Our advantages include:
- Trusted ASME SA312 SS 321H Pipes Supplier in India
- Experienced SS 321H seamless pipe exporter
- Reliable Stainless steel 321H pipe stockist
- Complete range of seamless, welded, and EFW pipes
- Competitive pricing with bulk order discounts
- Large ready stock for immediate dispatch
- Third-party inspection support
- Mill Test Certificates (MTC EN 10204 3.1)
- Customized sizes and lengths
- Worldwide shipping and export documentation
- Technical assistance for material selection
Our commitment to quality, timely deliveries, and customer satisfaction has made us a preferred supplier for clients across domestic and international markets.
Why Customers Choose Our Stainless Steel 321H Pipes
Customers continue to choose us because we focus on delivering products that combine quality, reliability, and value.
What Sets Us Apart?
- Trusted SS 321H pipe manufacturer
- Reliable ASME SA312 SS 321H Pipes Supplier in India
- Leading Stainless steel 321H pipe stockist
- Experienced SS 321H seamless pipe exporter
- Complete ASTM & ASME product range
- Ready stock for fast delivery
- Competitive pricing
- Strict quality assurance
- Worldwide shipping support
- Technical assistance from experienced professionals
Whether you require a single length of AISI 321H Schedule 40 Pipe or a complete project supply of SS ASTM A312 TP321H Seamless Pipes, we are committed to delivering products that meet international quality standards and customer expectations.
Related Stainless Steel Pipes Grades
- Stainless Steel 304 Pipe
- Stainless Steel 304l Pipe
- Stainless Steel 304H Pipe
- Stainless Steel 309H Pipe
- Stainless Steel 310 Pipe
- Stainless Steel 310S Pipe
- Stainless Steel 310H Pipe
- Stainless Steel 316 Pipe
- Stainless Steel 316L Pipe
- Stainless Steel 316H Pipe
- Stainless Steel 316TI Pipe
- Stainless Steel 317 Pipe
- Stainless Steel 317L Pipe
- Stainless Steel 321 Pipe
- Stainless Steel 321H Pipe
- Stainless Steel 347 Pipe
- Stainless Steel 347H Pipe
- Stainless Steel 410 Pipe
- Stainless Steel 446 Pipe
- Stainless Steel 904L Pipe
Request a Quote for Stainless Steel 321H Pipes
Looking for a dependable supplier of Stainless Steel 321H Pipes?
We supply premium-quality SS ASTM A312 TP321H Seamless Pipes, ASTM A358 Stainless Steel 321H EFW Pipe, AISI 321H Schedule 40 Pipe, and UNS S32109 stainless steel pipes in a wide range of sizes and schedules.
Contact our technical sales team today for:
- Latest pricing
- Mill Test Certificates (MTC)
- Product availability
- Technical support
- Bulk order discounts
- Custom manufacturing solutions
- Worldwide export assistance
Global Reach
Amardeep Steel Centre boasts a robust global presence, committed to delivering unparalleled service and quality to clients around the world. Our dedication to prompt delivery and exceptional customer care sets us apart in the industry. Major corporations across the USA, Europe, Asia, and other regions place their trust in our high-quality stainless steel 321H pipes. This widespread trust underscores our reputation for reliability and excellence. By consistently meeting and exceeding the expectations of our international clientele, we continue to solidify our position as a leader in the global steel market.
Countries We Export To
UNITED STATES, EUROPE, UK, UAE, SAUDI ARABIA, OMAN, KUWAIT, JORDAN, QATAR, INDONESIA, MALAYSIA, BRAZIL, SPAIN, ITALY, FRANCE, GERMANY, BAHRAIN, SRI LANKA, AZERBAIJAN, AUSTRALIA, AUSTRIA, PHILIPPINES, TURKEY, RUSSIA, IRAN, IRAQ, CANADA, KOREA, JAPAN, YEMEN, FINLAND, ZIMBABWE, HUNGARY, PORTUGAL, VIETNAM, MOROCCO, THAILAND, SOUTH AFRICA, MEXICO, SINGAPORE, GREECE, KUWAIT, POLAND, NEW ZEALAND, SWEDEN, SWITZERLAND, BELGIUM, BHUTAN, BANGLADESH, TAIWAN, ROMANIA, CAMBODIA, KAZAKHSTAN, AFGHANISTAN.
