HASTELLOY alloy B-2 (UNS N10665) is a nickel-molybdenum alloy known for its excellent resistance to reducing acids such as hydrochloric acid, sulfuric acid, and phosphoric acid. It offers robust mechanical properties and reliability across a wide range of temperatures, making it suitable for various demanding applications in corrosive environments.
Composizione chimica
Elemento
Composizione (%)
Nichel (Ni)
65.0 min
Molibdeno (Mo)
26.0 – 30.0
Ferro (Fe)
2,0 massimo
Cromo (Cr)
1,0 massimo
Cobalt (Co)
1,0 massimo
Manganese (Mn)
1,0 massimo
Silicon (Si)
00,10 massimo
Carbonio (C)
00,02 massimo
Fosforo (P)
0.040 max
Zolfo (S)
00,030 massimo
Proprietà meccaniche
Proprietà
Valore
Resistenza alla trazione, ksi (MPa)
110 (760) min
Limite di snervamento (compensazione dello 0,2%), ksi (MPa)
51 (350) min
Allungamento (% in 2 pollici)
40 min
Hardness, Rockwell B (HRB)
88 max
Prestazioni a diverse temperature
HASTELLOY B-2 demonstrates reliable performance across various temperature ranges:
Room Temperature:Offers outstanding resistance to reducing acids, ensuring longevity in chemical processing equipment.
Elevated Temperatures (up to 1000°F / 538°C):Maintains high strength and corrosion resistance in challenging industrial environments.
Low Temperatures:Retains ductility and toughness even at cryogenic temperatures, suitable for applications requiring resilience in extreme conditions.
Applicazioni industriali
HASTELLOY alloy B-2 finds widespread use in several key industries:
Settore industriale
Applicazioni
Elaborazione chimica
Reactor vessels, heat exchangers, and piping systems handling aggressive acids like sulfuric, hydrochloric, and phosphoric acids.
Petrochemical
Equipment for processing acids and chemicals in refineries and chemical plants.
Pharmaceutical
Pharmaceutical processing equipment requiring corrosion resistance to acids.
Pulp and Paper
Digesters, bleach plants, and equipment for corrosive chemical environments in paper production.
Shapes, Sizes, and Production Standards
Forma del prodotto
Forme disponibili
Taglie disponibili
Standard di produzione
Fogli
Plates, Sheets
Thickness: 0.025″ – 4.000″ (0.64mm – 101.6mm)
ASTM B333
Barre
Round bars, hexagonal bars
Diameter: 0.25″ – 4.0″ (6.35mm – 101.6mm)
ASTM B335
Tubes/Pipes
Seamless tubes, welded pipes
OD: 0.5″ – 8.0″ (12.7mm – 203.2mm)
ASTM B619, ASTM B622
Standards and Corresponding Grades
Paese/regione
Standard/Grade
Stati Uniti d'America
UNS N10665
Europe
2.4617
Germania
NiMo28
Francia
NiMo28
Welding, Processing, Polishing, Heat Treatment
Process
Dettagli
Saldatura
Excellent weldability using TIG, MIG methods, suitable for joining components in corrosive environments without compromising integrity.
in lavorazione
Machinable using conventional methods, offers flexibility in fabrication processes to meet specific design requirements.
Lucidatura
Capable of achieving smooth finishes for enhanced corrosion resistance, critical in applications requiring sanitary conditions.
Trattamento termico
Solution annealing at 1950°F (1065°C) followed by rapid quenching ensures optimal material properties and performance under stress.
Cold Processing, Advantages, and Disadvantages
Aspetto
Dettagli
Lavorazione a freddo
Retains ductility and formability at room temperature, facilitating shaping and forming processes in manufacturing.
Vantaggi
Exceptional resistance to reducing acids, high mechanical strength, and reliability in aggressive chemical environments.
Svantaggi
Higher initial cost compared to conventional stainless steels, limited availability in certain shapes and sizes may require custom fabrication solutions.
Similar Products
Product Name
Comparison
HASTELLOY Alloy C-276 (UNS N10276)
Higher molybdenum content, broader corrosion resistance in severe environments, suitable for a wider range of chemicals.
HASTELLOY Alloy B-3 (UNS N10675)
Enhanced thermal stability, superior resistance to hydrochloric acid and other strong acids, ideal for applications requiring extended service life in aggressive chemical environments.
Comparison of Similar Products
Property/Feature
HASTELLOY Alloy B-2 (UNS N10665)
HASTELLOY Alloy C-276 (UNS N10276)
HASTELLOY Alloy B-3 (UNS N10675)
Nickel Content (%)
65.0 min
57.0
65.0
Molybdenum Content (%)
26.0 – 30.0
16.0
28.0
Chromium Content (%)
1,0 massimo
16.0
1.5
Tensile Strength (ksi)
110 min
100 min
110 min
Yield Strength (ksi)
51 min
40 min
40 min
Resistenza alla corrosione
Excellent in reducing environments, withstands sulfuric, hydrochloric, and phosphoric acids.
Wide range of corrosive environments, excellent resistance to oxidizing and reducing acids.
Exceptional resistance to strong acids including hydrochloric acid, sulfuric acid, and other harsh chemicals.
This article provides a comprehensive overview of HASTELLOY alloy B-2 (UNS N10665), highlighting 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. Each section is presented in a structured table format to ensure clarity and accessibility of technical information, catering to engineers, manufacturers, and professionals in the chemical and industrial sectors.
