What is Stainless Steel 321/321H Flanges ?

Alloy 321 flanges are stabilized austenitic stainless steel with intergranular corrosion resistance. These flanges are highly alloyed and made from high quality raw material and superior machineries. These flanges are available in various sizes and shapes. The sizes of the flanges range from ½” to 60”. The Stainless Steel 321 flanges are made with high quality combinations and elements.

The grade includes a high amount of 18% chromium and 8% nickel content. The grade also involves a considerable amount of titanium grade. The stainless steel 321-321H also has great weldability and annealing properties. Stainless steel 321H flanges are used as a boiler and heat exchangers in some industries.

Stainless steel 321H flanges can withstand high heat and cold temperatures. It also provides excellent resistance from corrosion, crevice corrosion and stress cracking. It also provides excellent protection from oxidation and cryogenic corrosion.


SS Werkstoff No 1.4541 Socket Weld Flanges, Stainless Steel 321 RTJ Flange, Stainless Steel 321 Nippolet Flangs, ASTM A182 SS F321 Threaded Flanges, 321 SS WNRF Flanges Exporter, SS 321 Blind Flanges, SS 321 Weld Neck Flange Dealer in India.

Sumit impex is one of the most astonishing manufacturers and suppliers of these stainless steel 321 flanges. We at Sumit Impex make sure that our every product is made of high quality raw material and supreme quality elements. We also make sure that our every product is tested and certified.

Stainless steel 321H flanges resists oxidation to 1500°F., which is why the creep and rupture strength of the grade is higher than other grades. Alloy 321H also has high carbon content which provides it an amazing resistance. The tensile and yield strength of this grade is higher than other alloys. The minimum tensile strength of this alloy is 75000 psi and the yield strength is 30000 Psi.

Stainless Steel 321 & 321H Flanges Specifications

Specifications ASTM A182 / ASME SA182
Standard ANSI Flanges, ASME Flanges, BS Flanges, DIN Flanges, EN Flanges, etc.
Size Range 1/2″ (15 NB) to 48″ (1200NB) DN10~DN5000 , as per Customer Requirements
Dimensions ANSI/ASME B16.5, B 16.47 Series A & B, B16.48, BS4504, BS 10, EN-1092, DIN, etc.
Class / Pressure 150#, 300#, 600#, 900#, 1500#, 2500#, PN6, PN10, PN16, PN25, PN40, PN64 etc.
Surface pickling, annealing, bright, sand blast, hair line
Type Weld Neck Ring Flange (WNRF), 310 Stainless Steel, Slip-On Ring Flange (SORF), 310 Stainless Steel, Blind Ring Flange (BLRF), 310 Stainless Steel, Socket Weld Ring Flange (SWRF), 310 Stainless Steel, Threaded Ring Flange, 310 Stainless Steel, Lap Joint Ring Flange (LJRF), 310 Stainless Steel, Ring Type Joint Flange (RTJF), 310 Stainless Steel
Connection type Raised Face, Flat Face, Ring Type Joint, Lap-Joint Face, Large Male-Female, Small Male-Female, Large Tongue, Groove, Small Tongue, Groove.
Test Certificates EN 10204/3.1B, Raw Materials Certificate, 100% Radiography Test Report, Third Party Inspection Report, etc
SS 321 1.4541 S32100 SUS 321 X6CrNiTi18-10
SS 321H 1.4878 S32109 SUS 321H X12CrNiTi18-9
Grade C Mn Si P S Cr Mo Ni Fe
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
Density Melting Point Tensile Strength Yield Strength (0.2%Offset) Elongation
8.0 g/cm3 1457 °C (2650 °F) Psi – 75000 , MPa – 515 Psi – 30000 , MPa – 205 35 %
Stainless Steel 321/321H Flanges

Other Products

SS 321/321H SORF Flanges SS 321/321H WNRF Flanges
SS 321/321H Blind Flanges SS 321/321H Spacer Ring Flanges
SS 321/321H Ring Type Joint Flanges SS 321/321H Nipolet Flanges
SS 321/321H Nipo Flange SS 321/321H Long weld Neck Flanges
SS 321/321H Stainless Steel Pipe Flanges SS 321/321H Nipolet Flanges
SS 321/321H Flat Flange SS 321/321H Lap Joint Flanges

Stainless Steel 321 & 321S Flanges Price List

  • 321 Stainless Steel Flanges
    US $0.5-1000 / Piece (FOB Price)
  • SS 321H Pipe Flanges
    US $300-500 / Ton (FOB Price)
  • Stainless Steel 321 Weld Neck Flanges
    US $1-900 / Piece (FOB Price)
  • ASTM A182 321 Stainless Steel plate flanges
    US $0.5-1000 / Piece (FOB Price)
  • 321H Pipe Flanges
    US $1-300 / Piece (FOB Price)

Different Types of Stainless Steel 321 Flanges

  • Stainless Steel 321 Blind Flange
  • UNS S32100 Blind Flange
  • WNR 1.4541 Blind Flange
  • ASTM A182 Blind Flange
  • Grade 321 Blind Flange
  • Stainless Steel 321H Plate Flange
  • UNS S32109 Plate Flange
  • WNR 1.4878 Plate Flange
  • ASTM A182 Plate Flange
  • Grade 321H Plate Flange
  • Stainless Steel 321 Ring Flange
  • UNS S32100 Ring Flange
  • WNR 1.4541 Ring Flange
  • ASTM A182 Ring Flange
  • Grade 321 Ring Flange


We Sumit Impex Metal Ensure the Best Quality of Packing, Because It Plays an Important Role Especially in the Case of International Shipments in Which Consignment Passes Through Various Channels to Reach the Ultimate Destination, So We Put Extraordinary Concern Regarding Packaging.

We pack our goods in numerous ways based on the products. We pack our products in multiple ways, such as,

  • Boxes and Crates
  • Shrink-wrapped
  • Carton boxes
  • Wooden pallets
  • Wooden boxes
  • Wooden crates

Testings (Destructive, Non Destructive)

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

Application Industries

These material are not a single material but the name for a family of corrosion resistant steels. Like many scientific breakthrough the origins of stainless steel lies in a lucky accident. From the smallest part of zipper to the largest building skyscraper, stainless steel is an essential part of modern life.Stainless steel’s strength, resistance to corrosion and low maintenance make it the ideal material for a wide range of applications. It is also has a long life cycle and is 100% recyclable.

  • Construction
  • Bridges
  • Petrochemical Industry
  • Ship Building
  • Engineering
  • General Structural Purposes
  • Offshore and Onshore Services

Stainless Steel 321 Flange Manufacturers

Country we serve / City we deliver

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

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

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