Stainless Steel 321 Pipe
Rose Metal Industries is a trusted manufacturer, stockist, and exporter of premium-quality Stainless Steel 321 Pipes. Known for excellent corrosion resistance and high-temperature strength, SS 321 pipes are widely used in chemical, petrochemical, power generation, and marine industries across Tamil Nadu, Andhra Pradesh, Karnataka, Telangana, Puducherry (Pondicherry), and Andaman & Nicobar Islands as well as international markets. Our pipes meet stringent quality standards and global specifications to ensure long-term reliability.
SS 321 stainless steel is a titanium-stabilized austenitic grade that prevents intergranular corrosion and carbide precipitation during welding or high-temperature service. Rose Metal Industries offers both seamless and welded SS 321 pipes in multiple diameters, wall thicknesses, and finishes, including hot-finished, cold-drawn, and pickled surfaces. Our pipes are engineered for high-temperature applications such as heat exchangers, boiler tubes, and chemical transport pipelines.
Our SS 321 pipes undergo rigorous quality checks for chemical composition, mechanical properties, and dimensional accuracy. Industries in Chennai, Bengaluru, Hyderabad, Visakhapatnam, Vijayawada, Puducherry, and Port Blair rely on our ready-to-ship inventory for seamless project execution. Our production and stocking practices comply with ASTM A312, ASME SA312, and EN standards, ensuring international-quality pipes suitable for domestic and export applications..
Rose Metal Industries also provides customized SS 321 pipes, including specific diameters, wall thicknesses, cut-to-length options, and polished or bright finishes. Applications include high-temperature pipelines, offshore and marine piping, chemical processing lines, industrial boilers, furnace tubing, and thermal processing equipment. Our technical team assists clients in selecting the right pipe dimensions and grades for optimal performance.
Specifications of Stainless Steel 321 Pipes
| Specification | ASTM A312 / ASME SA312, EN 10216-5 |
|---|---|
| Grade | SS 321 / SS 321H |
| Type | Seamless, Welded (ERW, SAW) |
| Diameter | 1/2" to 24" (custom sizes available) |
| Wall Thickness | Schedule 5S to Schedule 160, Custom Thickness |
| Finish | Pickled, Polished, Hot Finished, Cold Drawn |
Chemical Composition (Typical wt%)
| Element | Content (%) |
|---|---|
| Carbon (C) | 0.08 max |
| Chromium (Cr) | 17.0 – 19.0 |
| Nickel (Ni) | 9.0 – 12.0 |
| Titanium (Ti) | ≥ 5 × C% |
| Manganese (Mn) | 2.0 max |
| Silicon (Si) | 0.75 max |
| Phosphorus (P) | 0.045 max |
| Sulfur (S) | 0.03 max |
| Iron (Fe) | Balance |
Mechanical Properties
| Property | Value |
|---|---|
| Tensile Strength | 515 MPa min |
| Yield Strength | 205 MPa min |
| Elongation | 40% min |
| Hardness | 217 HB max |
Equivalent Grades
| Standard | Grade |
|---|---|
| UNS | S32100 |
| EN | 1.4541 |
| JIS | SUS 321 |
Dimension Chart (Pipe OD & Wall Thickness)
| Nominal Diameter (inches) | Schedule | Wall Thickness (mm) |
|---|---|---|
| 1/2" | 10S | 2.77 |
| 1" | 40 | 3.73 |
| 2" | 80 | 6.02 |
| 4" | 160 | 12.70 |
| 6" | STD | 7.11 |
| 8" | XS | 9.53 |
Applications
- High-temperature piping in petrochemical and chemical plants
- Boiler tubes and heat exchangers
- Furnace and kiln piping
- Marine and offshore piping applications
- Power generation and thermal plant pipelines
- Industrial process piping requiring corrosion and oxidation resistance
We export SS 321 pipes globally to Europe, the Middle East, Southeast Asia, and other international markets. Each shipment is accompanied by complete documentation, including Mill Test Certificates (MTC), third-party inspection reports, and PMI analysis. This ensures full traceability, compliance with international standards, and peace of mind for our clients. Rose Metal Industries is recognized for reliability, timely delivery, and superior customer support.
With growing industrial demand in South India and international markets, Rose Metal Industries ensures SS 321 pipes provide long service life, excellent corrosion and oxidation resistance, and high-temperature durability. Our products are suitable for petrochemical, chemical, power, marine, and industrial applications, making us a preferred supplier across Tamil Nadu, Andhra Pradesh, Karnataka, Telangana, Puducherry, Andaman & Nicobar Islands, and beyond..
Frequently Asked Questions (FAQ)
Q1: What is the difference between SS 321 and SS 304 pipes?
A: SS 321 is titanium-stabilized to resist intergranular corrosion at high temperatures, while SS 304 is suitable for general-purpose applications at ambient conditions.
Q2: Do you provide Mill Test Certificates (MTC)?
A: Yes — Rose Metal Industries provides MTCs and can facilitate third-party inspection and PMI testing upon request.
Q3: Can you supply custom diameters, wall thicknesses, and finishes?
A: Yes — We supply both seamless and welded SS 321 pipes in custom sizes, cut-to-length, and surface finishes including polished, pickled, and hot/cold finished.
Q4: Do you supply SS 321 pipes in South India and islands?
A: Yes — We supply across Tamil Nadu, Andhra Pradesh, Karnataka, Telangana, Puducherry, and Andaman & Nicobar Islands.
Q5: Which industries commonly use SS 321 pipes?
A: Petrochemical, chemical, power generation, marine, offshore, furnace, boiler, and high-temperature industrial piping applications.