Flanges are commonly used in industrial settings for a variety of tasks, from connecting different sections of piping together to regulating the flow of gas or liquids. If you’re looking for an especially durable and reliable flange, Stainless Steel 321 and 321H Flanges can be a great option.


321 Steel Plate Flanges Suppliers, Distributors of ASME SA182 Stainless Steel 321H Blind Flanges, SS 321 Blind Flange, ASTM A182 Stainless Steel 321 Slip On Flanges Dealer, 321 Stainless Steel Flanges, Stainless Steel 321H Pipe Flange, SS Grades 321/321H Industrial Flanges Stockists, Stainless Steel 321 Flanges, SS 321H Flange in Mumbai, India.

Stainless Steel 321 Flanges is an incredibly versatile metal alloy that combines strength, durability, and corrosion resistance. In addition to being used on its own, it is also used as part of various alloys—such as stainless steel 321 (also known as UNS S32100) and stainless steel 321H (UNS S32109). Both are austenitic stainless steels, meaning they contain higher levels of chromium, nickel, and molybdenum than other alloys. The main difference between the two is their carbon content; while both have lower carbon levels than 304 or 316 grades, Type 321 contains slightly more carbon than Type 321H does. This difference matters when it comes to welding applications; because Type 321 has more carbon content, it can lead to intergranular corrosion if it’s not welded properly.


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Stainless Steel 321H Flanges are typically used in high-temperature settings where other metals may not be able to withstand extreme heat without losing their structural integrity. For example, Stainless Steel 321 Slip On Flanges may be used in boilers or processing equipment where temperatures could reach up to 1,000 degrees Fahrenheit (or 538 degrees Celsius). They are also often used in chemical processing plants because their resistance to corrosion makes them ideal for containing corrosive substances. Furthermore, Stainless Steel 321 Socket Weld Flanges can be found in food processing plants due to their ability to resist staining as well as their non-toxic properties—which means they won’t contaminate food products with heavy metals like some other metals might do.


Stainless Steel 321/321H Flanges

Stainless Steel 321/321H Flanges

The benefits of Stainless Steel 321H Spectacle Blind Flanges go beyond just temperature resistance and corrosion protection. These flanges also offer excellent strength-to-weight ratios—meaning that even though they’re strong enough to hold up under high pressures, they don’t add too much extra weight that could create additional stress on other parts of the machinery or system. Moreover, SS 321H Blind Raised Flanges are one of the most effective options out there when compared with other materials like Titanium Gr 2 Flanges or Nickel Alloy Flanges; this makes them a great choice for any budget-conscious operation looking for a reliable solution at an affordable price point.

Stainless Steel 321 Flanges are a great option worth considering. Types such as stainless steel 321 and 321H offer unique advantages such as excellent strength-to-weight ratios and affordability when compared with other materials such as titanium alloys or nickel alloys.

What are stainless steel 321 flanges, and what are they used for?

Stainless steel 321 flanges are high-quality components used to connect or join sections of pipe or tubing in a piping system. They are made from titanium-stabilized austenitic stainless steel that offers excellent resistance to high-temperature oxidation and corrosion.

What are the advantages of using stainless steel 321 flanges?

Stainless steel 321 flanges offer several advantages over other materials. They have excellent resistance to high-temperature oxidation & corrosion, making them suitable for use in harsh environments. They also have high strength & toughness, making them suitable for use in demanding applications.

What are the Applications of Stainless Steel 321H Flanges?

Stainless steel 321H flanges are high-quality components used to connect or join sections of pipe or tubing in a piping system. They are made from a high-carbon version of the titanium-stabilized austenitic stainless steel 321, which offers excellent resistance to high-temperature oxidation and corrosion.

DIN 1.4541 Stainless Steel Flat Face Flanges, SS 321 Plate Flange, Werkstoff No 1.4878 SS Socket Weld Raised Face Flanges (SWRF) Traders, 321H SS Weld Neck Raised Face Flanges (WNRF) Flanges Exporters, SS SUS 321 Spectacle Blind Flanges Suppliers, SS 321 Slip On Flanges, SS 321H Square Flanges, EN 1092-1 Stainless Steel 321 Reducing Flanges, Stainless Steel 321 BS4504 Tongue & Groove Flanges.

SS 321/321H Socket weld Flanges Specification

Specifications ASTM A182 / A240 & ASME SA182 / SA240

Dimensions ANSI/ASME B16.5, B 16.47 Series A & B, B16.48, BS4504, BS 10, EN-1092, DIN, etc.

Standard ANSI Flanges, ASME Flanges, BS Flanges, DIN Flanges, EN Flanges, etc.

Size 1/2" (15 NB) to 48" (1200NB)

Class / Pressure 150#, 300#, 600#, 900#, 1500#, 2500#, PN6, PN10, PN16, PN25, PN40, PN64 etc.

Flange Face Type Flate Face (FF), Raised Face (RF), Ring Type Joint (RTJ)

Grade 321 / 321H UNS (S32100, S32109), DIN (1.4541, 1.4878)

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Stainless Steel 321/321H Flanges Equivalent Indian Standard

STANDARD WERKSTOFF NR. UNS JIS EN
SS 321 1.4541 S32100 SUS 321 X6CrNiTi18-10
SS 321H 1.4878 S32109 SUS 321H X12CrNiTi18-9

ASTM A182 SS 321/321H Forged Flanges Chemical Composition

Grade C Mn Si P S Cr N Ni Ti
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

321/321H Stainless Steel ASME SA182 Threaded / Screwed Flanges Mechanical Properties

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 %

Other Types of 321/321H Stainless Steel Industrial Flanges

  • Stainless Steel 321 Slip On Flanges
  • 321H Stainless Steel Pipe Flanges
  • Stainless Steel 321 Blind Flanges
  • SS 321 Orifice Flange
  • Stainless Steel 321H Long Weld Neck Flanges

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