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.
Composition chimique
Élément
Composition (%)
Nickel (Ni)
56.0 min
Chrome (Cr)
20.0 – 22.5
Molybdène (Mo)
12.5 – 14.5
Fer (Fe)
2.0 – 6.0
Tungstène (W)
2,5 – 3,5
Cobalt (Co)
2.5 max
Manganèse (Mn)
00,50 maximum
Vanadium (V)
00,35 maximum
Silicium (Si)
0.08 max
Carbone (C)
0.010 max
Phosphore (P)
00,020 maximum
Soufre (S)
00,020 maximum
Propriétés mécaniques
Propriété
Valeur
Résistance à la traction, ksi (MPa)
115 (790) min
Limite d'élasticité (compensation de 0,2 %), ksi (MPa)
55 (380) min
Allongement (% en 2 pouces)
45 min
Dureté, Rockwell C (HRC)
89 max
Performances à différentes températures
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.
Applications industrielles
HASTELLOY alloy C-22 is widely used in several industries due to its exceptional corrosion resistance:
Secteur industriel
Applications
Traitement chimique
Reactors, vessels, and piping systems handling corrosive chemicals such as acids and chlorides.
Pétrochimique
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.
Formes, tailles et normes de production
Formulaire de produit
Formes disponibles
Tailles disponibles
Normes de production
Sheets/Plates
Plaques, Feuilles
Épaisseur : 0,025″ – 1,000″ (0,64 mm – 25,4 mm)
ASTMB575
Barres
Round bars, hexagonal bars
Diamètre : 0,25″ – 6,0″ (6,35 mm – 152,4 mm)
ASTMB574
Tubes/Tuyaux
Seamless tubes, welded pipes
OD: 0.5″ – 6.0″ (12.7mm – 152.4mm)
ASTM B619, ASTM B622
Normes et notes correspondantes
Pays/Région
Standard/Grade
USA
UNS N06022
Europe
2.4602
Allemagne
NiCr21Mo14W
France
NC22DNb
Welding, Processing, Polishing, Heat Treatment
Processus
Détails
Soudage
Excellent weldability using TIG, MIG methods, ensuring strong and reliable joints in corrosive environments.
Processing
Machinable using conventional methods, offering flexibility in fabrication processes.
Polissage
Capable of achieving smooth finishes for enhanced corrosion resistance and aesthetic appeal.
Traitement thermique
Solution annealing at 2050°F (1121°C) followed by rapid quenching optimizes material properties and performance.
Cold Processing, Advantages, and Disadvantages
Aspect
Détails
Cold Processing
Retains ductility and formability at room temperature, facilitating shaping and fabrication.
Avantages
Exceptional resistance to a wide range of corrosive chemicals, high mechanical strength, and reliability in harsh environments.
Désavantages
Higher initial cost compared to conventional stainless steels, potential limitations in availability of specific shapes and sizes.
Produits similaires
Product Name
Comparaison
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
Propriété/caractéristique
Hastelloy C-22
Hastelloy C-276
Hastelloy C-4
Teneur en nickel (%)
56,0
57,0
65.0
Teneur en molybdène (%)
12.5 – 14.5
16,0
16,0
Teneur en chrome (%)
20.0 – 22.5
16,0
16,0
Tensile Strength (ksi)
115 min
100 min
100 min
Yield Strength (ksi)
55 min
40 minutes
40 minutes
Résistance à la corrosion
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.
