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.
Composição química
Elemento
Composição (%)
Níquel (Ni)
56.0 min
Cromo (Cr)
20,0 – 22,5
Molibdênio (Mo)
12,5 – 14,5
Ferro (Fe)
2.0 – 6.0
Tungstênio (W)
2,5 – 3,5
Cobalto (Co)
2,5 máx.
Manganês (Mn)
00,50 no máximo
Vanádio (V)
00,35 máx.
Silício (Si)
0.08 max
Carbono (C)
00,010 máx.
Fósforo (P)
00,020 máx.
Enxofre (S)
00,020 máx.
Propriedades mecânicas
Propriedade
Valor
Resistência à tração, ksi (MPa)
115 (790) min
Força de rendimento (compensação de 0,2%), ksi (MPa)
55 (380) min
Alongamento (% em 2 polegadas)
45 minutos
Dureza, Rockwell C (HRC)
89 max
Desempenho em diferentes temperaturas
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.
Baixas temperaturas:Retains ductility and toughness down to cryogenic temperatures, suitable for applications requiring reliability in extreme conditions.
Aplicações Industriais
HASTELLOY alloy C-22 is widely used in several industries due to its exceptional corrosion resistance:
Setor Industrial
Formulários
Processamento Químico
Reactors, vessels, and piping systems handling corrosive chemicals such as acids and chlorides.
Petroquímica
Equipment for sulfuric acid regeneration, flue gas desulfurization systems, and chemical processing units.
Farmacêutico
Pharmaceutical processing equipment requiring resistance to aggressive chemicals.
Celulose e Papel
Digesters, bleach plants, and other components exposed to corrosive environments in paper production.
Usinável usando métodos convencionais, oferecendo flexibilidade nos processos de fabricação.
Polimento
Capaz de obter acabamentos suaves para maior resistência à corrosão e apelo estético.
Tratamento térmico
Solution annealing at 2050°F (1121°C) followed by rapid quenching optimizes material properties and performance.
Processamento a frio, vantagens e desvantagens
Aspecto
Detalhes
Processamento a frio
Mantém ductilidade e conformabilidade à temperatura ambiente, facilitando a modelagem e a fabricação.
Vantagens
Exceptional resistance to a wide range of corrosive chemicals, high mechanical strength, and reliability in harsh environments.
Desvantagens
Higher initial cost compared to conventional stainless steels, potential limitations in availability of specific shapes and sizes.
Produtos Similares
Nome do produto
Comparação
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.
Comparação de produtos semelhantes
Propriedade/Recurso
Hastelloy C-22
Hastelloy C-276
Hastelloy C-4
Conteúdo de níquel (%)
56,0
57,0
65.0
Conteúdo de molibdênio (%)
12,5 – 14,5
16,0
16,0
Conteúdo de cromo (%)
20,0 – 22,5
16,0
16,0
Resistência à tração (ksi)
115 minutos
100 minutos
100 minutos
Força de rendimento (ksi)
55 minutos
40 minutos
40 minutos
Resistência à corrosão
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.
