HASTELLOY alloy C-22 (UNS N06022) is a versatile nickel-chromium-molybdenum-tungsten alloy renowned for its exceptional resistance to a wide range of aggressive chemicals. This article provides a detailed and rich introduction to HASTELLOY C-22, covering its chemical composition, mechanical properties, performance characteristics at different temperatures, industry applications, available shapes and sizes, production standards, welding and processing capabilities, as well as advantages, disadvantages, and comparisons with similar products.
Composizione chimica
Elemento
Composizione (%)
Nichel (Ni)
56.0 min
Cromo (Cr)
20.0 – 22.5
Molibdeno (Mo)
12.5 – 14.5
Ferro (Fe)
2.0 – 6.0
Tungsteno (W)
2.5 – 3.5
Cobalto (Co)
2,5 massimo
Manganese (Mn)
00,50 massimo
Vanadio (V)
00,35 massimo
Silicon (Si)
00,08 massimo
Carbonio (C)
00,010 massimo
Fosforo (P)
00,020 massimo
Zolfo (S)
00,020 massimo
Proprietà meccaniche
Proprietà
Valore
Resistenza alla trazione, ksi (MPa)
115 (790) min
Limite di snervamento (compensazione dello 0,2%), ksi (MPa)
55 (380) min
Allungamento (% in 2 pollici)
45 min
Durezza, Rockwell C (HRC)
89 max
Prestazioni a diverse temperature
HASTELLOY C-22 exhibits excellent performance across varying temperature ranges:
Temperatura ambiente:Superior resistance to oxidizing and reducing acids, including sulfuric acid, hydrochloric acid, and acetic acid.
Elevated Temperatures (up to 1250°F / 677°C):Maintains high strength and corrosion resistance in aggressive chemical environments.
Basse temperature:Retains ductility and toughness down to cryogenic temperatures, suitable for applications requiring reliability in extreme conditions.
Applicazioni industriali
HASTELLOY alloy C-22 is widely used in several industries due to its exceptional corrosion resistance:
Settore industriale
Applicazioni
Elaborazione chimica
Reactors, vessels, and piping systems handling corrosive chemicals such as acids and chlorides.
Petrolchimico
Equipment for sulfuric acid regeneration, flue gas desulfurization systems, and chemical processing units.
Farmaceutico
Apparecchiature per il trattamento farmaceutico che richiedono resistenza agli agenti chimici aggressivi.
Pulp and Paper
Digesters, bleach plants, and other components exposed to corrosive environments in paper production.
Forme, dimensioni e standard di produzione
Forma del prodotto
Forme disponibili
Taglie disponibili
Standard di produzione
Fogli/Piastre
Piatti, Fogli
Spessore: 0,025″ – 1.000″ (0,64 mm – 25,4 mm)
ASTM B575
Barre
Barre tonde, barre esagonali
Diametro: 0,25″ – 6,0″ (6,35 mm – 152,4 mm)
ASTM B574
Tubi/tubazioni
Tubi senza saldatura, tubi saldati
Diametro esterno: 0,5″ – 6,0″ (12,7 mm – 152,4 mm)
Eccellente saldabilità con metodi TIG, MIG, garantendo giunti forti e affidabili in ambienti corrosivi.
in lavorazione
Lavorabile con metodi convenzionali, offre flessibilità nei processi di fabbricazione.
Lucidatura
In grado di ottenere finiture lisce per una maggiore resistenza alla corrosione e un aspetto estetico migliore.
Trattamento termico
Solution annealing at 2050°F (1121°C) followed by rapid quenching optimizes material properties and performance.
Lavorazione a freddo, vantaggi e svantaggi
Aspetto
Dettagli
Lavorazione a freddo
Mantiene la duttilità e la formabilità a temperatura ambiente, facilitando la modellatura e la fabbricazione.
Vantaggi
Eccezionale resistenza a un'ampia gamma di prodotti chimici corrosivi, elevata resistenza meccanica e affidabilità in ambienti difficili.
Svantaggi
Higher initial cost compared to conventional stainless steels, potential limitations in availability of specific shapes and sizes.
Prodotti simili
Nome del prodotto
Confronto
HASTELLOY C-276 (UNS N10276)
Higher nickel content, broader resistance to oxidizing and reducing environments, suitable for more severe corrosive conditions.
HASTELLOY C-4 (UNS N06455)
Enhanced thermal stability, superior resistance to hot contaminated mineral acids, excellent performance in high-temperature applications.
Confronto di prodotti simili
Proprietà/funzionalità
Hastelloy C-22
Hastelloy C-276
Hastelloy C-4
Contenuto di nichel (%)
56.0
57.0
65.0
Contenuto di molibdeno (%)
12.5 – 14.5
16.0
16.0
Contenuto di cromo (%)
20.0 – 22.5
16.0
16.0
Resistenza alla trazione (ksi)
115 minuti
100 min
100 min
Limite di snervamento (ksi)
55 minuti
40 minuti
40 minuti
Resistenza alla corrosione
Eccellente negli acidi ossidanti e riducenti, inclusi acido solforico, cloridrico e acetico.
Wide range of corrosive environments, including strong oxidizers and reducing agents.
Superior resistance to hot contaminated mineral acids and high-temperature applications.
This article provides an in-depth introduction to HASTELLOY alloy C-22 (UNS N06022), encompassing its chemical composition, mechanical properties, performance in various environments, industry applications, available forms and sizes, production standards, welding and processing capabilities, as well as advantages, disadvantages, and comparisons with similar alloys. The structured format using tables ensures clarity and accessibility of technical information, catering to engineers, manufacturers, and professionals seeking corrosion-resistant materials for demanding applications.
