Manufacturer of Stainless Steel 321 Flanges

BAHUBALI Alloys are Manufacturers, Supplier and Exporters of Stainless Steel 321 Flanges that is Fabricated From High Quality Raw Materials. SS 321 Flanges are used as a part of a blend of present day purposes and are essentially used to interface channels. Stainless Steel 321 Flanges are available in variables sizes for particular applications in refineries, waterworks, substance industry, petrochemicals, and advancement works.

Alloy 321 flange is a titanium balanced out austenitic stainless steel with great general erosion resistance. It has incredible impervious to erosion after introduction to temperatures in the chromium carbide precipitation scope of 800 – 1500°F (427 – 816°C). The composite opposes oxidation to 1500°F (816°C) and has higher crawl and push crack properties than amalgams 304 and 304L. It additionally has great low temperature toughness.


Table 1. Composition ranges for 321 Stainless Steel Flanges

Grade C Mn Si P S Cr Mo Ni N Other
321 min.
2.00 0.75 0.045 0.030 17.0
- 9.0
0.10 Ti=5(C+N)

Table 2. Mechanical properties of 321 Stainless Steel Flanges

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 also has a requirement for a grain size of ASTM No 7 or coarser.

Table 3. Physical properties of 321 Stainless Steel Flanges

Density (kg/m3)
Elastic Modulus (GPa)
Mean Coefficient of Thermal Expansion (μm/m/°C)
Thermal Conductivity (W/m.K)
Specific Heat 0-100°C (J/kg.K)
Electrical Resistivity (nΩ.m)
at 100°C
at 500°C

Table 4. Grade specifications for 321 Stainless Steel Flanges

Grade UNS No Old British Euronorm Swedish SS Japanese JIS
BS En No Name
321 S32100 321S31 58B, 58C 1.4541 X6CrNiTi18-10 2337 SUS 321
These comparisons are approximate only. The list is intended as a comparison of functionally similar materials not as a schedule of contractual equivalents. If exact equivalents are needed original specifications must be consulted.

Table 5. Standard specifications for 321 Stainless Steel Flanges

Designation A 182 / A 240, SA 182 / SA 240
Class 150#, 300#, 400#, 625#, 900#, 1500# & 2500#
Size 1/2" NB TO 48" NB
Standards ANSI B16.5, ANSI B16.47 Series A & B, MSS SP44, ASA, API-605, AWWA, Custom Drawings, ASTM, ASME Flanges, ANSI Flanges, DIN Flanges, EN Flanges, BS Flanges etc.
Grade A 182 321

Types of 321 Stainless Steel Flanges

   SS 321 Expander Flanges
   Stainless Steel 321 Weldo / Nipo Flanges
   SS 321 WNRF Flanges
   Stainless Steel 321 Ring Type Joint Flanges
   SS 321 Weld Neck Flanges Series A or B
   Stainless Steel 321 Spades Ring Spacers Flanges
   SS 321 Threaded Flanges
   Stainless Steel 321 Long Neck Weld Flanges
   Stainless Steel 321 Groove & Tongue Flanges
   SS 321 SWRF Flanges
   Stainless Steel 321 SORF Flanges
   SS 321 Flat Flanges

   Stainless Steel 321 Forged Flanges
   SS 321 High Hub Blinds Flanges
   Stainless Steel 321 Blind Flanges
   SS 321 Spectacle Blinds Flanges
   Stainless Steel 321 Reducing Flanges
   SS 321 Loose Flanges
   SS 321 Orifice Flanges
   Stainless Steel 321 RTJ Flanges
   SS 321 Socket Weld Flanges
   Stainless Steel 321 Screwed Flanges
   SS 321 Slip On Flanges
   Stainless Steel 321 Weld Neck Flanges
   Stainless Steel 321 Flange Facing Type & Finish
   SS 321 Lapped Joint Flanges
   SS 321 Square Flanges

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