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Girgaon, Mumbai - 400004
Stainless Steel 321H Welded Pipes
Stainless Steel 321H Welded Pipe Manufacturer & Stockist in India
Equipment operating under continuous high-temperature conditions demands piping materials that can retain their strength and corrosion resistance over extended service periods. Kamal Steels manufactures and stocks Stainless Steel 321H Welded Pipes for industries where elevated temperatures, pressure, and thermal cycling are part of everyday operations. Manufactured in accordance with ASTM A312 and ASME SA312 standards using Stainless Steel 321H (UNS S32109 / WNR 1.4878), our welded pipes are engineered to provide excellent oxidation resistance, enhanced creep strength, and dependable performance in demanding thermal environments.
Stainless Steel 321H is the high-carbon variant of the titanium-stabilized 321 grade, developed to improve mechanical strength and creep resistance during prolonged exposure to elevated temperatures. Its stabilized microstructure helps minimize carbide precipitation while maintaining excellent weldability and corrosion resistance, making SS 321H Welded Pipes a preferred choice for boilers, superheaters, heat exchangers, furnace equipment, petrochemical plants, refineries and power generation facilities.
Every Stainless Steel 321H Welded Pipe manufactured by Kamal Steels is produced using certified raw materials and subjected to stringent quality inspections, including weld integrity verification, dimensional accuracy checks, hydrostatic testing and complete material traceability. With extensive ready stock, project-specific manufacturing capabilities, and timely delivery, we provide reliable welded piping solutions that meet the demanding requirements of industrial projects across India and international markets.
Stainless Steel 321H Welded Pipe Specifications
| Product | Stainless Steel 321H Welded Pipe |
|---|---|
| Material Grade | 321H (UNS S32109) |
| Manufacturing Standard | ASTM A312 / ASME SA312 |
| Outside Diameter | 1/8" NB to 24" NB (6 mm to 610 mm) |
| Wall Thickness | SCH 5S to SCH XXS |
| Pipe Type | Welded, ERW, EFW & Fabricated |
| Length | Single Random, Double Random & Custom Cut Length |
| End Type | Plain End, Beveled End & Threaded |
| Surface Finish | Annealed & Pickled, Bright Annealed, 2B, No.1 & Polished |
| Inspection | Hydro Test, PMI, Radiography, Eddy Current Test & EN 10204 3.1 MTC |
Features & Benefits of Stainless Steel 321H Welded Pipes
Applications of Stainless Steel 321H Welded Pipes
Stainless Steel 321H Welded Pipes are specifically developed for high-temperature environments where enhanced creep strength and oxidation resistance are essential for reliable long-term operation.
Available Size Range
Kamal Steels offers Stainless Steel 321H Welded Pipes in a comprehensive range of sizes to meet the requirements of high-temperature piping systems across various industries. We also manufacture customized pipes based on customer drawings and project specifications.
Available Pipe Schedules
| Pipe Schedule | Availability |
|---|---|
| SCH 5S | Available |
| SCH 10S | Available |
| SCH 20 | Available |
| SCH 40S | Available |
| SCH 60 | Available |
| SCH 80S | Available |
| SCH 120 | Available |
| SCH 160 | Available |
| XS | Available |
| XXS | Available |
Surface Finish of Stainless Steel 321H Welded Pipes
To meet the performance and finishing requirements of different industries, Kamal Steels supplies Stainless Steel 321H Welded Pipes in a variety of surface finishes. Each finish enhances corrosion resistance, durability, and appearance while ensuring reliable service in demanding environments.
| Surface Finish | Description |
|---|---|
| Annealed & Pickled (AP) | Provides a clean surface with improved corrosion resistance after heat treatment. |
| Bright Annealed (BA) | Smooth and bright finish suitable for precision engineering applications. |
| 2B Finish | Standard industrial finish commonly used for fabrication and processing equipment. |
| No.1 Finish | Hot rolled finish recommended for high-temperature industrial service. |
| Polished Finish | Ideal for hygienic, pharmaceutical, food processing, and decorative applications. |
Manufacturing Standards
All Stainless Steel 321H Welded Pipes manufactured by Kamal Steels comply with globally recognized standards to ensure excellent dimensional accuracy, mechanical strength, corrosion resistance, and dependable performance in critical industrial applications.
| Standard | Description |
|---|---|
| ASTM A312 | Specification for seamless, welded and heavily cold-worked austenitic stainless steel pipes. |
| ASME SA312 | Pressure piping specification for stainless steel welded pipes. |
| ASTM A358 | Electric fusion welded austenitic chromium-nickel stainless steel pipes. |
| ASTM A778 | Specification covering welded austenitic stainless steel tubular products. |
| ASME B36.19M | Dimensions and tolerances for stainless steel pipes. |
| ASME B36.10M | Standard dimensions for welded and seamless steel pipes. |
Stainless Steel 321H Welded Pipe Chemical Composition
Stainless Steel 321H contains a controlled higher carbon content and titanium stabilization, providing excellent resistance to oxidation, intergranular corrosion, and improved creep strength at elevated temperatures.
| Element | Composition (%) |
|---|---|
| Carbon (C) | 0.04 – 0.10 |
| Manganese (Mn) | 2.00 Max |
| Silicon (Si) | 1.00 Max |
| Phosphorus (P) | 0.045 Max |
| Sulfur (S) | 0.030 Max |
| Chromium (Cr) | 17.00 – 19.00 |
| Nickel (Ni) | 9.00 – 12.00 |
| Titanium (Ti) | 5 × (C+N) Min – 0.70 Max |
| Nitrogen (N) | 0.10 Max |
| Iron (Fe) | Balance |
Mechanical Properties of Stainless Steel 321H Welded Pipe
Stainless Steel 321H Welded Pipes are engineered to provide reliable mechanical strength and long-term stability in high-temperature operating conditions.
| Property | Value |
|---|---|
| Tensile Strength | 515 MPa Minimum |
| Yield Strength (0.2% Offset) | 205 MPa Minimum |
| Elongation | 40% Minimum |
| Hardness | 95 HRB Maximum |
| Density | 7.90 g/cm³ |
| Melting Range | 1398 – 1454°C |
Equivalent Grades of Stainless Steel 321H Welded Pipe
| Standard | Equivalent Grade |
|---|---|
| ASTM / ASME | 321H |
| UNS | S32109 |
| Werkstoff No. | 1.4940 |
| EN | X8CrNiTi18-10 |
| JIS | SUS 321H |
| ISO | 321H |
Why Choose Kamal Steels?
Kamal Steels has established itself as a reliable manufacturer, supplier, stockist, and exporter of Stainless Steel 321H Welded Pipes by consistently delivering products that meet international quality standards. Our manufacturing process incorporates certified raw materials, advanced production techniques, and stringent quality inspections to ensure exceptional performance in demanding industrial environments. With a ready stock of standard sizes, customization capabilities, competitive pricing, and timely delivery, we are committed to providing dependable piping solutions for projects across India and worldwide.
Frequently Asked Questions
Stainless Steel 321H Welded Pipe is a high-carbon, titanium-stabilized austenitic stainless steel pipe developed for elevated temperature applications requiring excellent oxidation resistance and improved creep strength.
SS 321H contains a higher carbon content than SS 321, which improves its creep resistance and mechanical strength during prolonged exposure to high temperatures.
Kamal Steels manufactures SS 321H Welded Pipes in accordance with ASTM A312, ASME SA312, ASTM A358, ASTM A778, ASME B36.19M, and other applicable international standards.
We supply Stainless Steel 321H Welded Pipes from 1/8" NB to 24" NB in multiple schedules, wall thicknesses, and customized lengths based on customer requirements.
These pipes are widely used in refineries, petrochemical plants, power stations, boilers, superheaters, heat exchangers, furnace equipment, and high-temperature process piping systems.
Yes. Their titanium stabilization and higher carbon content make them suitable for continuous service at elevated temperatures while maintaining excellent mechanical properties.
Each pipe undergoes Hydrostatic Testing, Positive Material Identification (PMI), Radiographic Testing, Eddy Current Testing, Visual Inspection, and Dimensional Verification before dispatch.
Yes. Kamal Steels provides EN 10204 3.1 Mill Test Certificates with every shipment. Third-party inspection can also be arranged if required.
Yes. We manufacture customized pipes in various diameters, wall thicknesses, schedules, lengths, surface finishes, and end preparations according to project specifications.
Kamal Steels offers premium-quality Stainless Steel 321H Welded Pipes manufactured to international standards, backed by strict quality control, certified materials, competitive pricing, timely delivery, and reliable technical support for domestic and international customers.