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
Cobalt (Co)
2.5 max
Manganese (Mn)
00,50 massimo
Vanadium (V)
00,35 massimo
Silicon (Si)
0.08 max
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:
Room Temperature: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.
Low Temperatures: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.
Petrochemical
Equipment for sulfuric acid regeneration, flue gas desulfurization systems, and chemical processing units.
Pharmaceutical
Pharmaceutical processing equipment requiring resistance to aggressive chemicals.
Pulp and Paper
Digesters, bleach plants, and other components exposed to corrosive environments in paper production.
Shapes, Sizes, and Production Standards
Forma del prodotto
Forme disponibili
Taglie disponibili
Standard di produzione
Sheets/Plates
Plates, Sheets
Thickness: 0.025″ – 1.000″ (0.64mm – 25.4mm)
ASTM B575
Barre
Round bars, hexagonal bars
Diameter: 0.25″ – 6.0″ (6.35mm – 152.4mm)
ASTM B574
Tubes/Pipes
Seamless tubes, welded pipes
OD: 0.5″ – 6.0″ (12.7mm – 152.4mm)
ASTM B619, ASTM B622
Standards and Corresponding Grades
Paese/regione
Standard/Grade
Stati Uniti d'America
UNS N06022
Europe
2.4602
Germania
NiCr21Mo14W
Francia
NC22DNb
Welding, Processing, Polishing, Heat Treatment
Process
Dettagli
Saldatura
Excellent weldability using TIG, MIG methods, ensuring strong and reliable joints in corrosive environments.
in lavorazione
Machinable using conventional methods, offering flexibility in fabrication processes.
Lucidatura
Capable of achieving smooth finishes for enhanced corrosion resistance and aesthetic appeal.
Trattamento termico
Solution annealing at 2050°F (1121°C) followed by rapid quenching optimizes material properties and performance.
Cold Processing, Advantages, and Disadvantages
Aspetto
Dettagli
Lavorazione a freddo
Retains ductility and formability at room temperature, facilitating shaping and fabrication.
Vantaggi
Exceptional resistance to a wide range of corrosive chemicals, high mechanical strength, and reliability in harsh environments.
Svantaggi
Higher initial cost compared to conventional stainless steels, potential limitations in availability of specific shapes and sizes.
Similar Products
Product Name
Comparison
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.
Comparison of Similar Products
Property/Feature
Hastelloy C-22
Hastelloy C-276
Hastelloy C-4
Nickel Content (%)
56.0
57.0
65.0
Molybdenum Content (%)
12.5 – 14.5
16.0
16.0
Chromium Content (%)
20.0 – 22.5
16.0
16.0
Tensile Strength (ksi)
115 min
100 min
100 min
Yield Strength (ksi)
55 min
40 min
40 min
Resistenza alla corrosione
Excellent in oxidizing and reducing acids, including sulfuric, hydrochloric, and acetic acid.
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.
