INCONEL alloy 22 offers excellent resistance to aggressive corrosion by metal chloride and sulfate salts found in power generation boilers fired by municipal solid waste. Alloy steel components are commonly overlaid with alloy 22 by welding. Weld deposits fabricated using the NiCr-Mo-W alloy 22 do not exhibit the segregation tendencies shown by Ni-Cr-Mo-Nb alloy systems. This affords significant enhancements in corrosion resistance and excellent resistance to the corrosion-fatigue cracking which is commonly observed in low NOx boiler waterwall overlays applied using Ni-Cr-Mo-Nb materials.
Product Description
| Grade | UNS N06022; W. Nr. 2.4602; NiCr21Mo14W |
| Specification | ASTM B574, ASTM B575, ASTM B619, ISO 15156-3 (NACE MR 0175), DIN 17753 |
| Diamater | from .001'' (0.025mm) to 0.827'' (21mm) or as required |
| Application |
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Chemical Composition
| Ni | Cr | Mo | W | Co | Fe |
| Balancing | 20-22.5 | 12.5-14.5 | 2.5-3.5 | 2.5 max | 2.0-6.0 |
| Mn | Si | P | S | C | |
| 0.5 max | 0.08 max | 0.02 max | 0.02 max | 0.015max |
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