Stainless Steel 321 Flanges

Stainless Steel 321 Threaded Flanges, SS DIN 1.4541 RTJ Flanges Suppling at Qatar, ASTM A240 SS Forged Flanges Manufacturer, Stainless Steel 321 Reducing Flanges, SS 321 Flanges Manufacturing at Spain, Stainless Steel 321 Flanges Suppling at Egypt, ASME 16.47 Series B Steel Flanges Manufacturer & Stockist in Mumbai, India.

Alpha Overseas(AOS) manufactures and trades SS 321 Flanges, which is advantageous for high temperature service because of its good mechanical properties. A limitation with Alloy 321 Flanges is that titanium does not transfer well across a high temperature arc, so is not recommended as a welding consumable. Grade 321 Flanges has extensive use in aircraft parts, such as exhaust systems where operating temperatures are higher than 800 Degree F. Type 321 Flanges cannot be hardened by thermal treatment, but hardness and strength can be increased substantially by cold working, with subsequent reduction in ductility. To be a true “stabilized” grade, AISI 321 Flanges has to have Titanium (Ti) content at least 5 times of Carbon’s (C). This titanium addition in 321 Stainless Steel Flanges reduces or prevents carbide precipitation during welding and in the 800 Degree F – 1500 Degree F service conditions. Typical uses of Stainless Steel 321 Slip On Flanges include annealing covers, heavy duty and diesel automotive exhaust systems, high-temperature tempering equipment, etc. However, welded Stainless Steel 321 Blind Flanges must never be used in highly oxidising environments as it is liable to 'Knife-line' attack.

SS 321 Flanges
SS 321 Flanges
Stainless Steel 321 Flanges
Stainless Steel 321 Flanges

Stainless Steel 321 Blind Flanges, SS UNS S32100 Weld Neck Flanges Suppling at Indonesia, Stainless Steel 321 Slip On Flanges Manufacturing at Tanzania, SS 321 Socket Weld Flanges, Stainless Steel 321 /321 Plate Flanges Suppling at Belgium, SS 321 Lap Joint Flanges, SS 321 SWRF Flanges Supplier & Exporter in Mumbai, India.

Stainless Steel 321 Weld Neck Flanges offers higher creep and stress rupture properties than Alloy 304 and, particularly, Alloy 304L, which might also be considered for exposures where sensitization and intergranular corrosion are concerns.

In dynamic applications of SS 321 Socket Weld Flanges, fatigue strength is also important to consider.


ASTM A182, A240 SS Flanges Specification :

Size : 1/2" NB TO 48" NB

Specification : ASTM A182 / A240, ASME SA182 / SA240

Standards : ANSI Flanges, ASME Flanges, DIN Flanges, EN Flanges, BS Flanges etc.

Class : 150#, 300#, 400#, 600#, 900#, 1500# & 2500#.

Dimensions : ANSI B16.5, ANSI B16.47 Series A & B, MSS SP44, ASA, API-605, AWWA, Custom Drawings


SS 321 Flanges Equivalent Grades

SS 321 1.4541 S32100


Stainless Steel 321 Flanges Chemical Composition

Element Ni C Mn P S Si Cr
SS 321 9.00 – 12.00 0.08 2.00 0.045 0.030 1.00 17.0-19.0


SS Flanges Mechanical & Physical Properties

Element Density Melting Point Tensile Strength Yield Strength (0.2%Offset) Elongation
SS 321 8.0 g/cm3 1454 °C (2650 °F) Psi – 75000 , MPa – 515 Psi – 30000 , MPa – 205 40 %

Testings (Destructive, Non Destructive):
  • Positive Material Identification - PMI Testing
  • Chemical Analysis - Spectro Analysis
  • Mechanical Testing Such as Tensile, Elongation
  • Micro Test
  • Macro Test
  • Hardness Test
  • Pitting Resistance Test
  • Intergranular Corrosion (IGC) Test
  • Flaring Test
  • Flattening Test
  • Hydrostatic Test
  • Hydrogen-Induced Cracking (HIC) Test, NACE TM0284
  • Sulfide Stress Corrosion Cracking (SSC), NACE TM 0177
  • Radiography Test
  • Dye Penetrant Test (DP Test)
  • Ultra Sonic Test (UT)
  • Eddy Current Testing
  • Impact Test
  • Bend Test


  • We understand the importance of packaging specially in case of international shipments as the consignment has to go through a number of channels to reach the final destination, thus we take proper care of packing.
  • We pack our goods in a various ways depending on the products. The different ways in which our products are packed are:
    • Shrink-wrapped
    • Wooden Boxes
    • Wooden Pallets
    • Wooden Crates
    • Carton boxes


  • All our products will have complete marking details which are co-related to the test certificates we supply.
  • In case of orders for cut piece of Pipes, Sheets or Round Bars, the marking is transferred from the product from which it is cut. In such cases we provide Letter confirming the marking transfer and picture of the product from which it is cut.


Delivery Time:
  • If the items are available in stock, we take 2 days from the date of receipt of advance payment to clear the shipment and send it to port.
  • And in-case the items are not availabe in stock, the time taken for manufacturing depends on the size, quantity and grade.
  • However we can claim the fact that we can compete with anyone in India on Delivery time and most of the time our production time is the least.
  • We have tied up with strong logistic partners in India which can undertake any type of shipping activites and make sure that there is no delay in shipment.


  • We welcome stage wise inspection, final stage inspection from any of your representative or third party inspection agencies.
  • We regularly have inspections ongoing at our premises from internationally acclaimed Inspection Agencies such as TUV, Llyods, BVIS, SGS, DNV etc.


  • Furnaces (piping, doors, burners, fans and recuperators)
  • Components (Cryogenic)
  • Industries processing food
  • Bed Furnaces (Fluidized) suc as grids, wind boxes, piping, coal combustors
  • Stainless Steel 321 is used in smelter and steel melting equipment, continuous casting equipment in Steel Plants and Ore Processing Plants
  • Petroleum and Petrochemical refineries for catalytic recovery systems, flares, recuperators, tube hangers
  • Stainless Steel 321 is used in Power Generation for coal gasifier internals, pulverized coal burners, tube hangers
  • Sintering/Cement Plants – burner shields, burners, wind boxes feeding and discharging systems
  • Thermal Process Plants for annealing covers and boxes, burner grids, doors, fans, muffles and retorts, recuperators, walking beams

Other Types Of SS Flanges
  • SS 321 WNRF Flanges
  • Stainless Steel 321 BLRF Flanges Distributors
  • SS DIN 1.4541 Lap Joint Flanges Suppliers
  • SS UNS S32100 Weld Neck Flanges
  • 321 Stainless Steel Blind Flanges Suppliers at Austria
  • 321 Stainless Steel Plate Flanges
  • SS 321 Weld Neck Flanges
  • 321 SS Reducing Flanges Exporter
  • 321 SS Pipe Flanges
  • Stainless Steel 321 Lap Joint Flanges
  • SS 321 Slip On Flanges Exporter
  • Stainless Steel 321 Threaded Flanges
  • Stainless Steel 321 Lap-Joint Flanges
  • SS 321 Orifice Flanges Stockist
  • Stainless Steel 321 DIN Flanges
  • Stainless UNS S32100 Ring Type Joint Flanges
  • SS 321 Long Weld Neck Flanges Exporter
  • ASTM A240 SS 321 Flanges
  • ASME SA240 Stainless Steel 321 Flanges Suppliers at South Africa
  • SS 321 RTJ Flanges Stockist
  • SS 321 Industrial Flanges Manufacturer
  • 321 SS Forged Flanges Dealers
  • Stainless Steel DIN 1.4541 Flanges
  • Stainless Steel 321 BLRF Flanges

Approved manufacturer of
Sabic approved Stainless Steel 321 Pipe Flanges
KNPC approved SS 321 Slip On Flanges
Williamson approved SS 321 Socket Weld Flanges
MARAFIQ approved Stainless Steel 321 Weld Neck Flanges
Magnetrol approved 321 Blind Flanges
QATARGAS approved 321 Stainless Steel Threaded Flanges
ONGC approved Stainless Steel 321 Forged Flanges
FW approved Stainless Steel 321 BLRF Flanges
IBR approved SS 321 Plate Flanges
Alba approved Stainless Steel 321 Ring Type Joint Flanges
Kuwait Oil Company approved 321 Lap Joint Flanges
Egyptian General Petroleum Corporation approved Stainless Steel 321 Industrial Flanges
Industry We Serve
Stainless Steel 321 WNRF in Petrochemical Industry
ASME Flanges in Oil & Gas Industry
ASTM A182 Stainless Steel 321 RTJ Flanges in Power Plant at Oman
ASTM A182 Stainless Steel 321 Long Weld Neck Flanges in Pharmaceuticals Industry
321 SS Spectacle Blinds Flanges in Chemicals Industry
SS 321 Loose Flanges in Defence Industry
321 Stainless Steel Industrial Flanges in Food and Beverages Industry
SS 321 Pipe Flanges in Sugar Industry
Stainless Steel 321 Screwed Flanges in Paper Industry
321 Stainless Threaded Flanges in Cement Industry
321 BLRF Flanges  Dairy Industry at Russia
Flanges in Mining Industry

We Supply Our Stainless Steel 321 Flanges in Countries like


We are Exports in Exporting SS 321 Flanges worldwide

We are Exporter of Stainless Steel 321 Flanges in Worldwide Such as Egypt, Ghana, Azerbaijan, Turkey, Morocco, Afghanistan, Macau, Iran, Denmark, Romania, Hungary, Bahrain, India, Venezuela, Kenya, Bulgaria, Namibia, Greece, Israel, Mexico, Norway, Vietnam, Saudi Arabia, Belarus, Canada, China, France, Croatia, Spain, Iran, Angola, Slovakia, Argentina, Mongolia, Singapore, Kuwait, Hong Kong, Zimbabwe, Kazakhstan, Lebanon, Brazil, Belgium, Indonesia, South Korea, Ireland, United States, Lithuania, Chile, Thailand, Gabon, Philippines, Italy, Nigeria, Australia, Puerto Rico, Netherlands, Mexico, Russia, Ecuador, Bangladesh, Switzerland, Czech Republic, Trinidad & Tobago,Tunisia, Pakistan, Sweden, Tibet, Poland, Costa Rica, Iraq, Bolivia, Germany, Portugal, Nepal, Oman, South Africa, Jordan, Libya, Finland, Algeria, United Kingdom, Poland, New Zealand, Serbia, Sri Lanka, Peru, United Arab Emirates, Taiwan, Colombia, Austria, Qatar, Chile, Yemen, Japan, Nigeria, Gambia, Malaysia, Estonia, Ukraine, Bhutan.

We have supplied of SS 321 Flanges to following places

We are Suppliers of Stainless Steel 321 Flanges in India Such as Al Khobar, Caracas, Kolkata, Chennai, Dubai, Cairo, Petaling Jaya, Thiruvananthapuram, Sharjah, Indore, Mumbai, Manama, Hong Kong, Al Jubail, Kanpur, Ranchi, Kuala Lumpur, Ahvaz, Calgary, Ernakulam, Visakhapatnam, London, Singapore, Noida, Santiago, Bogota, Riyadh, Vung Tau, Kuwait City, Bangkok, Faridabad, La Victoria, Edmonton, Jakarta, Gurgaon, New Delhi, Istanbul, Geoje-si, Jaipur, Montreal, Ankara, Nagpur, Nashik, Chiyoda, Howrah, Rajkot, Haryana, Bhopal, Muscat, Courbevoie, Hyderabad, Coimbatore, Brisbane, Chandigarh, Bengaluru, Moscow, Sydney, Tehran, Gimhae-si, Jeddah, Ahmedabad, Doha, Thane, New York, Dallas, Melbourne, Madrid, Houston, Ludhiana, Abu Dhabi, Jamshedpur, Pimpri-Chinchwad, Atyrau, Navi Mumbai, Pune, Busan, Toronto, Karachi, Milan, Algiers, Baroda, Rio de Janeiro, Colombo, Hanoi, Seoul, Los Angeles, Ho Chi Minh City, Vadodara, Perth, Dammam, Granada, Port-of-Spain, Mexico City, Surat, Secunderabad, Ulsan, Lahore, Aberdeen, Lagos.