With in-house quality testing and certification, you can count on quality materials delivered with proper documentation.
Stainless Steel 321/321h Seamless Tube Manufacturer.
SEAMLESS: DIN 1.4541 Tube | UNS S32100 Tube | JIS SUS 321 Tube | ASTM A213 TP321h Tube | BS 321S31 Tube | EN X6CrNiTi18-10| DIN 1.4878 Tube
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The Stainless Steel 321/321H Seamless Tubes are an austenitic nickel-chromium alloy with added titanium, making it ideal for use in elevated environments. MPJ is widely considered the best stockist, exporter and manufacturer of Stainless Steel 347/347h Seamless Tubes in India, having market expertise over decades of qualitative service. We have an exponential number of satisfied consumers in both national and international markets. Our brand has become a household name, mainly due to high-end quality products and services that we offer. Our stainless steel products are exported to various countries across the world, some of which include France, Denmark, Morocco, Switzerland, Belgium, Slovakia, Tanzania, Egypt, Tunisia, Namibia, Mauritius, United Arab Emirates, Qatar, Saudi Arabia, Jordan, Lebanon, Thailand , Myanmar, Philippines, Azerbaijan, Israel, Hong Kong, South Korea, Yemen and more.
For demanding applications that require higher strength and tolerance capabilities, Stainless Steel 321/321H Seamless Tubos are ideal due to its high quality, strength, and minimal price. In addition, the UNSS32100 (321) and UNSS32109 (321H) seamless tubes have other qualities such as higher tensile strength, ductility, durability, flexibility, and formability. Due to their wide range of applications, these tubes are suitable for a variety of industries. Some of them are oil and gas, chemical, pharmaceutical, pressure vessels, industrial boilers, petrochemicals, power generation, pulp and paper industries, condensers, heat exchangers, offshore drilling industries and many more.
The Stainless Steel 321/321H Seamless Tubes also have other properties that make them an ideal choice for aerospace engineering as well as many storage units, especially due to the non-corrosive nature of these seamless tubes. The Stainless Steel 321/321H Seamless Tubes are used in a variety of industrial applications and have been listed as one of the most popular products in all major industries. At MPJ, we offer seamless tubes with outside diameters from 6.0mm to 76.10mm and wall thicknesses from 0.50mm to 8.0mm. The shapes we offer include Round, Coil, and U-Shaped. These tubes are also available in various specifications, such as ASTM, ASME, DIN EN (Germany), NF (AFNOR), and JIS (Japan). In addition to that, we can also do customized manufacturing according to clients’ requirements.
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Stainless Steel 321/321h Seamless Tube Chemical Composition
| Grade | Range | Ni | Cr | P | Fe | C | Mn | N | Si | S | Ti |
|---|---|---|---|---|---|---|---|---|---|---|---|
| 321 | Min. | 9.0 | 17.0 | 0 | 65.045 | – | – | – | – | – | – |
| Max. | 12.0 | 19.0 | 0.045 | – | 0.08 | 2.0 | 0.10 | 1.0 | 0.030 | 5(C+N) -0.70 | |
| 321H | Min. | 9.0 | 17.0 | – | 65.25 | 0.04 | – | – | – | – | – |
| Max. | 12.0 | 19.0 | 0.045 | 0.010 | 2.00 | 0.10 | 1.00 | 0.030 | 4(C+N) -0.70 |
SS 321/321h Seamless Tubes Mechanical Properties
| Grade | Tensile Strength min (MPa) | Yield Strength 0.2% Proof min (MPa) | Hardness | Elongation (% in 50mm) min | |
|---|---|---|---|---|---|
| Brinell max (HB) | Rockwell B max (HR B) | ||||
| 321/321h | 515 | 205 | 217 | 95 | 40% |
SS ASTM A213 TP321h Tubing Equivalent Grades
| Grade | UNS No | Old British | Euronorm | Japanese JIS | Swedish SS | GOST | ||
|---|---|---|---|---|---|---|---|---|
| BS | En | No | Name | |||||
| 321 | S32100 | 321S31 | X6CrNiTi18-10 | 1.4541 | – | SUS 321 | 2337 | – |
| 321h | S32109 | 321S51 | X10CrNiTi18-10 | 1.4878 | – | SUS 321h | – | – |
321/321h Stainless Steel Tubes Standard Specifications
Spec. No.
Title
Scope
ASTM A213
Seamless Ferritic Stainless Steel and Austenitic Stainless Steel Tubes.
Pressure tubes, made from 16 grades of austenitic stainless steel and from 12 grades of ferritic Cr-Mo Alloy Steel.
ASTM A269
Austenitic Stainless Steel 304 Seamless Tubing for General Service.
13 grades of austenitic stainless steel tubing for general corrosion-resisting and high-temperature service. (Types 304, 304L, 316, 316L, 317, 321, 347, 348 and XM grades).
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Size Range
- Outer Diameter: 6.00 mm OD to 101.40 mm OD
- Wall Thickness: 0.50 mm to 8.00 mm
- Length: Upto 30 Meter
- Specifications: ASTM, ASME, DIN EN (GERMAN), NF (AFNOR), JIS (JAPAN)
Supply Condition
- Bright Annealed / Solution Annealed & Passivated
Features
- Ability to supply tubes with stringent NDT Testing, Special Chemistry, Lower Residual Stress values.
- OD Polishing : Grit Polish from 120 to 600.
- Closer Dimensional Tolerance & higher Corrosion Resistance etc.
- We offer customized cut Length to save time of our customers.
321/321h SS Seamless Tube Quality Control
To ensure a quality product, MPJ is holding certificate ISO 9001:2015, ISO 45001, OHSAS 14001, & CE-PED. We are also members of various renowned agencies and Chambers of Commerce including MASSMA, EEPC, FICCI, FIEO, Indian Merchants Chamber, etc. With state-of-the-art manufacturing processes, contemporary technologies, and proficient services, we consider: offering the finest quality, best in class products. Compliance with specifications as per standards, Outer Diameter, Thickness, Inside Diameter, Inside Finish, Marking, Ends, and Finishing. This ensures that we never face a rejection of the Stainless Steel 321h Seamless Tube supplied.
Brand – 
SS 321 Seamless Tubing are marked in requirement of the international standards.
Format: ” BRAND-SIZE-SPECIFICATION-GRADE-HEAT NUMBER-LOT NUMBER “
This marking helps for the identification of the tube and supported with the Material Test Report. It is 100% traceable to our mill.
Available Stainless Steel Seamless Tubing Grades
Stainless Steel 321 SMLS Tubes Packing & Documentation
ASTM A269 TP321h Seamless Tubes are surface wash and clean to remove all impurities and stock in the warehouse. Then it is wrapped in thin plastic and also it ends are protected by plastic caps to avoid any damage in transit. Stainless Steel 321 Seamless Tube is bundled in bubble wrap followed by assorting them in colored plastic bundles. An outer rope is tied to protect the tubing and they are packed in wooden box or container.
MPJ Provide Stainless Steel 321 Seamless Tube and SS 321hL Seamless Tubes with all necessary documents such as commercial invoice, packing list, Test Reports, HS Code, Country of Origin attested by the chamber of commerce, Fumigation Certificate, Warranty Letter, and Base Material Certificates. Every lot is supplied with a material test certificate as per EN 10204 NACE 3.1 standards indicating the chemical and mechanical properties of the Instrumentation Tubes.
We also confirm the guarantee of the seamless tubes supplied as per Purchase order specifications and attest the same in the Material Test Certificate. We also welcome any third party inspection from an agency nominated by the customer to comply with NACE 3.2 Certification if required by the customer at an extra cost.
SS 321/321h Seamless Tube Application Industries
- Oil & Gas Exploration
- Petrochemicals and Refineries
- Cross Country Pipe Line for Gas & Water
- Pipes for Engineering purpose
- Thermal, Nuclear and Solar Power Plants
- Desalination Plants
- Chemical Industries
- Aerospace
- Atomic Energy
- Pharmaceutical
- Food and Dairy
- Automobile
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