Metinox Overseas is a well-known manufacturer and distributor of SS 321/321H Seamless Pipes, which has high quality pipes that are up to the global standards. Late machinery and high-grade materials have been employed in manufacturing our pipes, which guarantee high durability and high performance in adverse conditions. The SS 321/321H Seamless Pipes are very resistant to oxidation and corrosion, and therefore are the ideal ones when working with high temperatures like in the chemical industry, aerospace, and in the petrochemical sector. They are best suited in those environments in which intergranular corrosion resistance and creep strength are required.
SS 321 is a titanium-stabilized stainless steel that works amazingly well in the resistance to corrosion/oxidation in the range of 427-816�C. The "H" variant of SS 321, or SS 321H, comes in as its High-Carbon counterpart, providing higher tensile strength and resistance to creep in the range of about 537�C. These two variants have exceptional welding qualities, making them widely used in such applications. The SS 321/321H Seamless Pipes offered by our company are made through the extrusion process to provide a welded, jointless structure that increases the overall tensile strength. These seamless pipes are ideal for applications in any industry where durable performance under heavy stress at higher temperatures is needed.
| Specification Parameter | Technical Details & Range |
| Industry Standards | ASTM A312 / ASME SA312 |
| Seamless Pipe Size | 1/2" NB to 16" NB (Standard); up to 24" NB available Ex-stock |
| Outside Diameter (OD) | 6.00 mm up to 914.4 mm (OD size steel tubes also available) |
| Thickness Range | 0.3 mm to 50 mm |
| Pipe Schedules | SCH 5, 10, 40, 80, 80S, 160, XXS, XS |
| Type & Form | Seamless; Round Pipes, Square Pipes, Rectangular Pipes |
| Length | Single Random, Double Random & Required Cut Lengths |
| End Connections | Plain End, Beveled End, Threaded |
| Outside Finish | 2B, No.1, No.4, No.8 Mirror Finish; Custom finishes as per client |
| Delivery Condition | Annealed & Pickled, Polished, Bright Annealed, Cold Drawn |
| EN 10216-5 (Seamless) | Grade 321/321H (1.4541) Seamless pipes for pressure purposes |
| EN 10217-7 (Welded) | Grade 321/321H (1.4878) Welded pipes for pressure purposes |
| Grade | C (%) | Mn (%) | Si (%) | P (%) | S (%) | Cr (%) | N (%) | Ni (%) | Ti (%) |
| SS 321 | 0.08 max | 2.0 max | 1.0 max | 0.045 max | 0.030 max | 17.00 - 19.00 | 0.10 max | 9.00 - 12.00 | 5(C+N)-0.70 max |
| SS 321H | 0.04 - 0.10 | 2.0 max | 1.0 max | 0.045 max | 0.030 max | 17.00 - 19.00 | 0.10 max | 9.00 - 12.00 | 4(C+N)-0.70 max |
| Property | Value (Imperial) | Value (Metric) |
| Tensile Strength (min) | 75,000 psi | 515 MPa |
| Yield Strength (0.2% Offset) (min) | 30,000 psi | 205 MPa |
| Elongation (min) | 35% | 35% |
| Hardness (Rockwell B) max | 95 HRB | � |
| Hardness (Brinell) max | � | 217 HB |
| Standard / Grade | UNS | Werkstoff Nr. | EN Designation | JIS (Japan) |
| SS 321 | S32100 | 1.4541 | X6CrNiTi18-10 | SUS 321 |
| SS 321H | S32109 | 1.4878 | X12CrNiTi18-9 | SUS 321H |
| Feature | SS 321 Seamless Pipe | SS 321H Seamless Pipe |
| Carbon Content | 0.08% Maximum | 0.04% � 0.10% (Higher range) |
| Titanium Stabilization | Ti = 5 times (C+N) min, 0.70% max | Ti = 4 times (C+N) min, 0.70% max |
| Grain Size | No specific requirement | ASTM No. 7 or coarser (Required) |
| Service Temperature | Up to 815�C (1500�F) | Above 537�C (1000�F) for creep |
| Creep Strength | Standard | Superior (Due to carbon & grain size) |
| Primary Advantage | General corrosion & weldability | Long-term thermal stability |
| Common Applications | Exhaust systems, manifolds | Boilers, Heat exchangers, Superheaters |
Metinox Overseas offers a comprehensive range of SS 321/321H pipe types to meet diverse industrial requirements.
SS 321_332H Seamless U-Shape Pipes
SS 321_332H Seamless Square Pipes
SS 321_332H Seamless Round Pipes
SS 321_332H Seamless Honed Tubes
SS 321_332H Seamless Coiled Tubing
SS 321_332 Seamless Rectangular Pipe
The process of making seamless SS 321/321H pipes is done in a controlled manner to provide strength, durability, and accuracy. The pipes are made through the process of extrusion, which ensures that there is no welding of the material. The following are the necessary steps in the making of these pipes.
SS 321/321H Seamless Pipes are also well known and famous in terms of thermal, oxidation, and corrosion resistance. These are the traits that make them a popular option for numerous industries. The following is a brief overview of some of the places they are applied:
These pipes are applied in such a critical part of the system as exhausts and turbine blades, where resistance to both heavy heat and oxidation is required. They are also dependable even in harsh environments.
In reactors, pipelines, and heat exchanger units, these pipes are exposed to harsh chemicals and high temperatures. The pipes' toughness makes them suitable for use in harsh conditions.
In food production, these pipes are used in processing food, beverages, and dairy products. They are resistant to heat and corrosion, which keeps everything safe and clean.
These pipes are the most important elements in power plants and boilers, especially steam lines and heat exchangers. They resist high temperatures and pressure, which keeps the system running.
SS 321/321H pipes are best used in transferring heat in chemical industries, petrochemical and nuclear industries. They are solid in resisting corrosion, as well as heat making them a strong option to use in such a challenging task.
These pipes are used in marine equipment and offshore platforms where they are immune to corrosion and harsh environments by salt water and are ideal in the harsh marine environment.
Such pipes are used in automotive exhaust systems and catalytic converters, where they should be able to withstand the high temperature and harsh environment of the engine exhaust gases.
Pharmaceuticals SS 321/321H pipes are applied in equipment used in the processing of chemicals and pharmaceuticals. Their resistance to corrosion is one of the most important factors in the safety and integrity of drug production.
These pipes are used in the transportation of chemicals and steam in recovery boilers and digesters in paper production due to their resistance to chemicals and high-pressure steam.
| Product Type | Price (INR / Kg) | Price (USD / Kg) | Notes |
| Standard SS 321 Seamless Pipe | ?320 � ?450 | 3.80 � 5.40 | General industrial grade. |
| SS 321H (High Carbon) Pipe | ?350 � ?520 | 4.20 � 6.20 | Higher cost due to carbon control. |
| Large Diameter (Over 8" NB) | ?480 � ?650 | 5.70 � 7.80 | Requires specialized extrusion. |
| Instrumentation Tubes | ?600 � ?850 | 7.20 � 10.20 | Precision drawn with tight tolerances. |
| Thick Wall (Heavy Sch.) | ?450 � ?600 | 5.40 � 7.20 | Based on the weight-to-diameter ratio. |
Choose Metinox Overseas � Your Reliable SS 321/321H Seamless Pipe Supplier & Exporter.
Let us support your projects with quality, precision, and performance.
SS 321H has a higher carbon content than SS 321, which enhances its high-temperature strength, making it suitable for applications where higher temperatures are involved.
SS 321 can withstand temperatures up to 900�C (1650�F), depending on the specific conditions.
Yes, Stainless Steel 321 and 321H are both highly weldable, especially with low heat input.
Yes, SS 321 and 321H are commonly used in food processing equipment due to their excellent resistance to corrosion and high temperatures.
To weld SS 321/321H Seamless Pipes, use TIG or MIG welding with compatible filler material (ER 321 or ER 347), and ensure proper heat control to prevent carbide precipitation. Post-weld heat treatment may also be required.
Stainless steel 304h seamless pipe, stainless steel 310h seamless pipe, stainless steel 316 316l seamless pipe, stainless steel 316ti seamless pipe, stainless steel 317 317l seamless pipe, stainless steel 347 347h seamless pipe, stainless steel 904l seamless pipe, 321 Stainless Steel schedule 160 Seamless Pipes, SS 321/321H Seamless Pipe Price List, Thick Walled Stainless Steel 321H Seamless Pipe Stockists in India, Seamless Stainless Steel UNS S32109 Pipe, Grade 321H Seamless Pipes, schedule 80 Stainless Steel 321H Seamless Pipes, Stainless Steel 321 Large Diameter Seamless Pipe, SS 321H Seamless Pipe exporter in India, SS 321 / 321H Seamless Pipe Distributor, ASTM A312 321 Stainless Steel Seamless Pipe, Seamless Stainless Steel 321/321H Pipes Manufacturer in Mumbai, 321 SS schedule 40/40S Seamless Pipe Supplier in India, Stainless Steel 321H Seamless Pipe Gauges, SS 321 schedule 10 Seamless Pipe
Bogota, Ho Chi Minh City, Visakhapatnam, Al Jubail, Sydney, Madrid, Busan, Ernakulam, Cairo, Seoul, Manama, Hanoi, Bhopal, Port-of-Spain, Los Angeles, Al Khobar, Jeddah, Rajkot, Vung Tau, Colombo, Navi Mumbai, Riyadh, Indore, Brisbane, Thiruvananthapuram, Lahore, New York, Toronto, Lagos, Secunderabad, Bengaluru, Courbevoie, Faridabad, Petaling Jaya, Chandigarh, Bangkok, Milan, Aberdeen, Kuwait City, Atyrau, Nashik, Moscow, Chiyoda, Gimhae-si, Chennai, Geoje-si, Coimbatore, Ranchi, Jaipur, Nagpur, Ankara, Hyderabad, Gurgaon, New Delhi, Kolkata, Kuala Lumpur, Kanpur, Houston, Dubai, Ahvaz, Granada, Pune, Hong Kong, Calgary, Ahmedabad, Rio de Janeiro, Doha, Santiago, Caracas, Dallas, Pimpri-Chinchwad, La Victoria, Muscat, London, Tehran, Noida, Istanbul, Melbourne, Ulsan, Ludhiana, Jamshedpur, Dammam, Jakarta, Algiers, Mumbai, Mexico City, Surat, Baroda, Montreal, Vadodara, Abu Dhabi, Edmonton, Singapore, Perth, Sharjah, Karachi, Haryana, Thane, Howrah.
Estonia, New Zealand, Mexico, Macau, Ukraine, Sweden, United States, Chile, Ireland, Switzerland, Denmark, Malaysia, Trinidad & Tobago, Morocco, Thailand, Russia, Azerbaijan, Hong Kong, Peru, Ghana, United Arab Emirates, Kuwait, Croatia, Costa Rica, Gambia, Netherlands, Philippines, Algeria, Qatar, Indonesia, Spain, Kenya, Nigeria, Slovakia, France, Egypt, South Africa, Argentina, Australia, Norway, Venezuela, Turkey, Bangladesh, Saudi Arabia, Tibet, Yemen, Czech Republic, Tunisia, Jordan, Bulgaria, United Kingdom, India, Angola, Libya, Romania, Vietnam, Canada, Austria, Singapore, Sri Lanka, Nepal, Hungary, Lebanon, South Korea, Gabon, Serbia, Greece, Israel, Namibia, Lithuania, Chile, Ecuador, Belgium, Kazakhstan, Taiwan, Germany, Zimbabwe, Mongolia, Oman, Nigeria, Brazil, Italy, Finland, Poland, Iran, Bahrain, Bhutan, Afghanistan, Mexico, Portugal, Belarus, Pakistan, Colombia, Iran, Iraq, Japan, Bolivia, China, Poland, Puerto Rico.
Get pricing within 24 hours!
