NS338
Material grade: NS338 corrosion resistant alloy
US grade:/Hastelloy C-22( C22 UNS N06022)
German grade: W,Nr,2.4602
Overview
NS338/Hastelloy C-22 alloy is a versatilenickel-chromium-molybdenum-tungsten alloy with better overall corrosionresistance than other existing nickel-chromium-molybdenum alloys, includingHastelloy C-276 , C4 and 625 alloys. Hastelloy C-22 alloy has excellentresistance to pitting, crevice corrosion and stress corrosion cracking. It hasexcellent resistance to aqueous solvents, including wet chlorine, nitric acidor a mixed acid of oxidizing acids containing chloride ions.
Application areas : It are used in a widerange of applications in the chemical and petrochemical industries, such as inthe contact with chloride-containing organic components and catalytic systems.This material is especially suitable for use in high temperature, inorganic andorganic acids (such as formic acid and acetic acid) and seawater corrosiveenvironments.
1,chemical composition:
alloy | % | Ni | Cr | Mo | Fe | W | Co | C | Mn | Si | V | P | S |
C-22 | Mini | balance | 20,0 | 12.5 | 2 | 2.5 | - | - | - | - | - | - | - |
max |
| 22.5 | 14.5 | 6 | 3.5 | 2.5 | 0,015 | 0,5 | 0,08 | 0,35 | 0,02 | 0,02 |
2.NS338 /Hastelloy C-22 implementation standards:
Bar | Medium/thin plate | Seamless tube | Welded pipe | Forgings | Welded pipe |
ASTM B574 | ASTM B575 | ASTM B622 | ASTM B619 | ASTM B564 | ASTM B626 |
3,Physical properties :
Density:8.9 g/cm3.
meltingpoint :, 1325-1370
4 Classification andEx-factory status:
(1), Classification: We can produce variousspecifications of seamless pipe, steel plate, round steel, forging, flange, ring, welded pipe, steel strip, wire and supporting Weldingconsumables,
(2). Ex-factory status: Seamless pipe:solid solution + acid white, withcustomizable length; Sheet: solid solution, pickling, trimming; Welded pipe:solid solution acid white + RT% flaw detection, forgings: annealing + latheprocessing; Bar: forging, with surface polishing or lathe processing; Strip:cold-rolled, solid solution soft phase, and descaled; Wire: solid solutionpickling coil or straight strip, solid solution straight strip with polishingsurface.
