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
Table 2. Grade specifications for 420 Stainless Steel Flanges
|Grade||UNS No||Old British||Euronorm||Swedish SS||Japanese JIS|
|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|