Stainless Steel 321 and 321H are popular austenitic stainless steel grades known for their exceptional resistance to high-temperature environments and corrosion. Buttweld fittings play a crucial role in various industries, including petrochemical, chemical, and power generation, by facilitating secure and leak-free connections between pipes and other components. Stainless Steel 321 and 321H Buttweld Fittings are sought after for their superior performance and durability in these demanding applications.
Key Features and Benefits:
Corrosion Resistance: Stainless Steel 321 and 321H exhibit excellent resistance to various corrosive environments, including organic and inorganic acids, making them suitable for handling chemicals and acids without deteriorating.
High-Temperature Resistance: These alloys can withstand elevated temperatures up to 900°C (1652°F) due to the addition of titanium, which stabilizes the material against sensitization and intergranular corrosion.
Excellent Weldability: Stainless Steel 321 and 321H are easily weldable, allowing for secure and reliable connections in complex piping systems. Their ability to maintain their corrosion resistance after welding is a significant advantage.
Durability: These alloys are highly durable and long-lasting, reducing maintenance and replacement costs in industrial settings.
Versatility: Stainless Steel 321H is a higher carbon version of 321, which offers improved high-temperature strength. This allows for flexibility in choosing the most suitable grade for specific applications.
Table Of Content
Common Applications:
Stainless Steel 321 and 321H Buttweld Fittings find widespread use in various industries, including:
Petrochemical Industry: These fittings are ideal for handling corrosive petrochemical products and high-temperature processes, ensuring safe and reliable connections.
Chemical Industry: The corrosion-resistant properties of these alloys make them perfect for transporting and processing various chemicals and acids.
Power Generation: Stainless Steel 321 and 321H Buttweld Fittings are vital for power plants, where they are exposed to high-temperature and high-pressure conditions.
Food and Beverage Industry: They are used in the production and processing of food and beverages, thanks to their corrosion resistance and hygiene properties.
Aerospace and Automotive: These fittings are employed in the aerospace and automotive sectors due to their ability to withstand extreme temperatures and environmental conditions.
ASTM A403 / ASME SA403
ANSI B16.9, B16.25, B16.28, MSS-SP-43, MSS-SP-48, MSS-SP-59
Seamless Butt Weld Fittings : 1/2″ – 10″ Welded Butt Weld Fittings : 1/2″ – 48″
Seamless / Welded / Fabricated
SCH10, SCH20, SCH30, STD SCH40, SCH60, XS, SCH 80, SCH 100, SCH 120, SCH 140, SCH 160, XXS available with NACE MR 01-75
from 2 to 40 mm
R=1D, 2D, 3D, 5D, 6D, 8D, 10D or Custom
90 Deg. Elbow, 45 Degree Elbow, LR/SR Elbow, Reducers, Tee, Cross, Bends 1.5d, 3d, 5d, 10d, U bend, 180 Deg Bend, Short / Long stubends, End Cap, Lap-joint Stub End
| STANDARD | WERKSTOFF NR. | UNS |
| SS 321 | 1.4541 | S32100 |
| SS 321H | 1.4878 | S32109 |
| Grade | Ni | C | Mn | P | S | Si | Cr | Mo | N | TI | |
| 321 | Max | 12.00 | 0.08 | 2.00 | 0.045 | 0.030 | 1.00 | 19.0 | 3 – 4 | 0.10 max | 0.70 |
| Min | 9.00 | - | - | - | - | - | 17.0 | - | - | 5(C+N) | |
| 321H | Max | 12.00 | 0.08 | 2.00 | 0.045 | 0.030 | 1.75 | 19.0 | 3 – 4 | 0.10 | 0.70 |
| Min | 9.00 | 0.04 | - | - | - | - | 17.0 | - | - | 4(C+N) | |
| Grade | Tensile Strength (MPa) min | Yield Strength 0.2% Proof (MPa) min | Elongation (% in 50mm) min | Hardness | |
| Rockwell B (HR B) max | Brinell (HB) max | ||||
| 321 | 515 | 205 | 40% | 95 | 217 |
| 321H | 515 | 205 | 40% | 95 | 217 |
Oil & Gas Industrires
Chemical Industries
Construction Industries
Offshore Pipelines & Pipe Works
Petrochemical Industry
Shipbuilding Industries
Hydraulic Applications
Piping Systems
Refining Industry
Food Processing Industry
Pulp & Paper Industry
Power Plant Industry
Costa Rica, Iran, Netherlands, Libya, Ecuador, Bangladesh, Croatia, Poland, Kazakhstan, Qatar, Colombia, Nigeria, Afghanistan, Germany, Algeria, Lahore, Puerto Rico, Philippines, Romania, Mongolia, Lithuania, Bolivia, Estonia, Switzerland, France, Russia, South Africa, United Kingdom, Saudi Arabia, Bhutan, Oman, Portugal, Chile, Ghana, Thailand, Algiera, China, Hungary, New Zealand, Slovakia, Italy, Singapore, columbia, Yemen, Tunisia, Israel, Mexico, Gabon, Vietnam, Czech Republic, Hong Kong, Belgium, Azerbaijan, Peru, Namibia, India, Macau, Indonesia, Sweden, Serbia, Finland, Gambia, Denmark, Jordan, Bahrain, Kuwait, United Arab Emirates, Trinidad & Tobago, Greece, Nepal, Ukraine, South Korea, Tibet, Canada, Australia, United States, Belarus, Taiwan, Pakistan, Kenya, Lebanon, Brazil, Bulgaria, Zimbabwe, Morocco, Spain, Egypt, Venezuela, Norway, Angola, Argentina, Ireland, Austria, Japan, Iraq, Turkey, Malaysia, Sri Lanka.
New Delhi, Howrah, Noida, Chennai, Secunderabad, Thiruvananthapuram, Ludhiana, Gurgaon, Surat, Ranchi, Nagpur, Rajkot, Chandigarh, Ernakulam, Hyderabad, Kolkata, Pune, Thane, Bhopal, Navi Mumbai, Haryana, Bengaluru, Visakhapatnam, Jamshedpur, Mumbai, Ahmedabad, Faridabad, Jaipur, Nashik, Kanpur, Indore, Pimpri-Chinchwad.
