Shubham Metals is recognized among the top Stainless Steel 321 / 321H Buttweld Fittings manufacturers in Bangalore, India , delivering piping solutions capable of withstanding extreme thermal and chemical environments. SS 321 and SS 321H are titanium-stabilized austenitic stainless steels designed to resist intergranular corrosion caused by chromium carbide precipitation at high temperatures. Our fittings are manufactured in strict compliance with ASTM A403 WP321/321H, ASME B16.9, B16.28, and MSS-SP-43 standards, ensuring dimensional accuracy, pressure integrity, and long service life. These fittings are ideal for high-temperature piping systems in power plants, refineries, chemical reactors, and aerospace applications where both mechanical strength and corrosion resistance are critical.
Understanding Stainless Steel 321 & 321H – Titanium-Stabilized Alloys
Stainless Steel 321 is an austenitic stainless steel alloy with titanium addition to prevent intergranular corrosion during high-temperature service, typically up to 870°C (1600°F). SS 321H is a low-carbon variant (≤0.04%) that provides even better resistance to sensitization, making it suitable for welded and high-temperature pipelines. Both grades offer excellent oxidation resistance, thermal stability, and creep strength, making them preferred materials in industrial boilers, superheaters, and heat exchangers. Their ability to maintain mechanical integrity under cyclic thermal loads makes them indispensable for critical piping networks.
Wide Range of Stainless Steel 321 / 321H Buttweld Fittings
Our manufacturing facility produces a comprehensive portfolio of fittings suitable for high-temperature and corrosion-prone environments.
Product Portfolio Includes:
- 90° & 45° Elbows for directional change in thermal pipelines
- 180° Return Bends for compact system layouts
- Equal Tees for branch distribution in high-temperature lines
- Reducing Tees for flow management
- Concentric & Eccentric Reducers for pipeline size transition
- Stub Ends compatible with lap joint flanges
- End Caps for secure termination of hot pipelines
Construction Options:
- Seamless Buttweld Fittings for high-pressure thermal systems
- Welded Buttweld Fittings for cost-effective applications
- Custom Fabricated Fittings for specialized industrial requirements
Advanced Manufacturing Process – Precision for High-Temperature Service
Every SS 321 / 321H Buttweld Fitting undergoes rigorous manufacturing processes to guarantee thermal and corrosion performance. Certified stainless steel plates or pipes are hot or cold formed, trimmed, beveled, and polished to ensure welding compatibility and dimensional consistency. Final quality assurance includes wall thickness inspection, dimensional verification, surface quality checks, and traceable marking, ensuring each fitting can withstand extreme temperature fluctuations without structural failure.
Technical Specifications & Compliance Standards
|
Specification Parameter |
Details |
|
Material Grade |
Stainless Steel 321 / 321H |
|
ASTM Standard |
ASTM A403 WP321 / WP321H |
|
ASME Equivalent |
ASME SA403 WP321 / WP321H |
|
Dimensional Standard |
ASME B16.9 / B16.28 |
|
MSS Standard |
MSS-SP-43 |
|
Size Range |
½” NB to 48” NB |
|
Pressure Ratings |
As per schedule thickness |
|
Schedule |
SCH 5S to XXS |
|
End Preparation |
Beveled for welding |
|
Marking |
Grade, Size, Heat No., Standard |
Chemical Composition – Titanium-Stabilized Alloy
|
Element |
321 |
321H |
|
Chromium (Cr) |
17 – 19 |
17 – 19 |
|
Nickel (Ni) |
9 – 12 |
9 – 12 |
|
Titanium (Ti) |
5×C min |
5×C min |
|
Carbon (C) |
Max 0.08 |
Max 0.04 |
|
Manganese (Mn) |
Max 2 |
Max 2 |
|
Silicon (Si) |
Max 1 |
Max 1 |
|
Phosphorus (P) |
Max 0.045 |
Max 0.045 |
|
Sulfur (S) |
Max 0.03 |
Max 0.03 |
The titanium addition ensures resistance to intergranular corrosion during prolonged exposure to high-temperature service, particularly in welded joints.
Mechanical Properties – Reliable Under Thermal Stress
|
Property |
Value |
|
Tensile Strength |
515 MPa (Min) |
|
Yield Strength |
205 MPa (Min) |
|
Elongation |
40% (Min) |
|
Hardness |
201 HB (Max) |
|
Modulus of Elasticity |
193 GPa |
These properties allow SS 321 / 321H Buttweld Fittings to retain structural integrity under thermal cycling, pressure variations, and high-temperature industrial loads.
Testing, Inspection & Documentation
Every batch is supplied with Mill Test Certificates (MTC), and additional testing can be conducted for critical projects.
Available Testing Services:
- Positive Material Identification (PMI)
- Hydrostatic Testing
- Ultrasonic Testing (UT)
- Dye Penetrant Testing (DPT)
- Radiographic Testing (RT)
- Third-Party Inspection
This ensures compliance with global industrial standards and traceable quality assurance.
Industrial Applications of Stainless Steel 321 / 321H Buttweld Fittings
SS 321 / 321H Buttweld Fittings are ideal for high-temperature and corrosion-resistant pipelines across critical industries.
Major Industry Applications:
- Boilers, Superheaters & Heat Exchangers
- Chemical Processing Plants
- Petrochemical Refineries
- Power Generation Units
- Aerospace and High-Temperature Process Lines
- Food & Beverage Processing Lines with Heat Exposure
- Marine Applications and Offshore Thermal Piping
Why Choose Shubham Metals for SS 321 / 321H Buttweld Fittings?
Choosing Shubham Metals ensures high-temperature resistant, dimensionally accurate, and fully certified fittings tailored to industrial pipelines.
Our Advantages:
- Leading Stainless Steel 321 / 321H Buttweld Fittings manufacturer in Bangalore, India
- Titanium-stabilized alloys for long-term thermal reliability
- Advanced forming, finishing, and beveling technology
- Consistent dimensional accuracy
- Ready stock for urgent industrial requirements
- Competitive bulk pricing and PAN Bangalore, India delivery
- Export-ready fittings for global markets
- Dedicated technical support for EPC and industrial clients
Stainless Steel 321 / 321H Buttweld Fittings Suppliers in Bangalore, India
Shubham Metals is top Stainless Steel 321 / 321H Buttweld Fittings Suppliers in Bangalore, India , maintaining ready inventory of SS 321 / 321H Buttweld Fittings to support urgent industrial and chemical projects.
Supplier Benefits:
- Stock in multiple sizes and schedules
- Fast delivery across major industrial hubs
- Certified ASTM 321/321H materials
- Technical support for product selection
Stainless Steel 321 / 321H Buttweld Fittings Dealers in Bangalore, India
As a reliable Stainless Steel 321 / 321H Buttweld Fittings Dealers in Bangalore, India , Our dealership network ensures reliable access to high-temperature resistant fittings for contractors, fabricators, and industrial buyers.
Dealer Support Includes:
- Certified and genuine fittings
- Flexible minimum order quantities
- Prompt dispatch and coordination
- Technical guidance for high-temperature applications
Stainless Steel 321 / 321H Buttweld Fittings Exporters in Bangalore, India
Shubham Metals is a professional Stainless Steel 321 / 321H Buttweld Fittings Exporters in Bangalore, India , supplying global industrial markets with high-temperature resistant, titanium-stabilized piping components.
Export Capabilities:
- FOB & CIF shipment options
- Third-party inspection coordination
- Export documentation support
- Secure transit packaging
- Timely global delivery
Get in touch with Us for reliable Stainless Steel 321 / 321H Buttweld Fittings!
For high-temperature, titanium-stabilized Stainless Steel 321 / 321H Buttweld Fittings, Shubham Metals provides certified materials, technical assistance, and competitive pricing. Contact us today to request pricing, check stock, or discuss your industrial requirements.
Technical Specifications
| Stainless Steel 321/321H Buttweld Fittings – Technical Specifications | |
|---|---|
| UNS Number | S32100 |
| ASTM Specification | A312 TP321 |
| Size Range | Seamless 1/2" to 24", Welded 6" to 48" |
| Type | Elbow 45°/90°/180°, Tee (Equal/Reducing), Reducer (Concentric/Eccentric), Cap, Stub End, Cross |
| Wall Schedule | SCH 10 to XXS |
| Standards | ASME B16.9, B16.28, MSS-SP-43, MSS-SP-75 |
| Manufacturing | Cold-formed / Hot-formed / Forged |
| End Finish | Bevelled End as per ASME B16.25 |
| Testing | Hydrostatic, PMI, Hardness, IGC, Ultrasonic, Dye Penetrant |
| Certification | EN 10204 3.1 / 3.2 Mill Test Certificate |
