Manufacturer of Stainless Steel 420 Flanges

Stainless Steel 420 Flange is a hardenable, martensitic stainless steel that is an adjustment of Alloy 410. Like 410, it contains no less than 12% chromium, adequately sufficient to give utilization safe properties. Flange 420 has higher carbon content than flange 410 which is expected to enhance quality and hardness properties. It has incredible flexibility its the reinforced condition yet is prepared for being set up to Rockwell hardness 50 HRC, the most essential hardness of the 12% chromium grades.

Due to its hardening properties, Alloy 420 is not routinely welded, in spite of the way that it is possible. Martensitic stainless steels are expected for high hardness and every so often diverse properties are to some degree bartered. Disintegration resistance is lower than the typical austenitic assessments and their accommodating working degree is confined by their loss of adaptability at beneath zero temperatures and loss of value by over-treating at raised temperatures. Its best utilization resistance is refined when the metal is hardened and surface ground is cleaned.


Table 1. Composition ranges for 420 Stainless Steel Flanges

Grade C Mn Si P S Cr Mo Ni N
420 min.
- 0.75 -

Table 2. Grade specifications for 420 Stainless Steel Flanges

Grade UNS No Old British Euronorm Swedish SS Japanese JIS
BS En No Name
420 S42000 420S21 - - - - SUS 420
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 3. Standard specifications for 420 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 182 420

Types of 420 Stainless Steel Flanges

   SS 420 Expander Flanges
   Stainless Steel 420 Weldo / Nipo Flanges
   SS 420 WNRF Flanges
   Stainless Steel 420 Ring Type Joint Flanges
   SS 420 Weld Neck Flanges Series A or B
   Stainless Steel 420 Spades Ring Spacers Flanges
   SS 420 Threaded Flanges
   Stainless Steel 420 Long Neck Weld Flanges
   Stainless Steel 420 Groove & Tongue Flanges
   SS 420 SWRF Flanges
   Stainless Steel 420 SORF Flanges
   SS 420 Flat Flanges

   Stainless Steel 420 Forged Flanges
   SS 420 High Hub Blinds Flanges
   Stainless Steel 420 Blind Flanges
   SS 420 Spectacle Blinds Flanges
   Stainless Steel 420 Reducing Flanges
   SS 420 Loose Flanges
   SS 420 Orifice Flanges
   Stainless Steel 420 RTJ Flanges
   SS 420 Socket Weld Flanges
   Stainless Steel 420 Screwed Flanges
   SS 420 Slip On Flanges
   Stainless Steel 420 Weld Neck Flanges
   Stainless Steel 420 Flange Facing Type & Finish
   SS 420 Lapped Joint Flanges
   SS 420 Square Flanges

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