Lega HASTELLOY® C-276

HASTELLOY-Alloy-C-276

HASTELLOY C276 (UNS N10276) Product Introduction

HASTELLOY C276 (UNS N10276) is a highly versatile nickel-molybdenum-chromium alloy renowned for its exceptional corrosion resistance in a wide range of severe environments. This article provides a detailed and rich introduction to HASTELLOY C276, 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

ElementoComposizione (%)
Nichel (Ni)57.0 min
Cromo (Cr)14.5 – 16.5
Molibdeno (Mo)15.0 – 17.0
Ferro (Fe)4.0 – 7.0
Tungsteno (W)3.0 – 4.5
Cobalt (Co)2.5 max
Manganese (Mn)1,0 massimo
Vanadium (V)00,35 massimo
Silicon (Si)0.08 max
Carbonio (C)00,010 massimo
Fosforo (P)0.040 max
Zolfo (S)00,030 massimo

Proprietà meccaniche

ProprietàValore
Resistenza alla trazione, ksi (MPa)110 (760) min
Limite di snervamento (compensazione dello 0,2%), ksi (MPa)52 (355) min
Allungamento (% in 2 pollici)40 min
Durezza, Rockwell C (HRC)28 – 36

Prestazioni a diverse temperature

HASTELLOY C276 exhibits excellent performance across varying temperature ranges:

  • Room Temperature: Superior resistance to corrosive media including oxidizing and reducing environments.
  • Elevated Temperatures: Maintains high strength and corrosion resistance up to 2000°F (1093°C).
  • Low Temperatures: Retains ductility and toughness at cryogenic temperatures, suitable for extreme environments.

Applicazioni industriali

HASTELLOY alloy C276 is widely used in several industries due to its exceptional corrosion resistance:

Settore industrialeApplicazioni
Elaborazione chimicaReactors, heat exchangers, and piping systems handling acids, chlorides, and other corrosive chemicals.
PetrochemicalEquipment for sulfuric acid production, pollution control, and chemical processing units.
Olio e gasComponents exposed to sour gas environments containing hydrogen sulfide.
PharmaceuticalPharmaceutical processing equipment requiring resistance to aggressive chemicals.

Shapes, Sizes, and Production Standards

Forma del prodottoForme disponibiliTaglie disponibiliStandard di produzione
Sheets/PlatesPlates, SheetsThickness: 0.025″ – 1.000″ (0.64mm – 25.4mm)ASTM B575
BarreRound bars, hexagonal barsDiameter: 0.25″ – 6.0″ (6.35mm – 152.4mm)ASTM B574
Tubes/PipesSeamless tubes, welded pipesOD: 0.5″ – 6.0″ (12.7mm – 152.4mm)ASTM B622, ASTM B619

Standards and Corresponding Grades

Paese/regioneStandard/Grade
Stati Uniti d'AmericaUSA N10276
Europe2.4819
GermaniaNiMo16Cr15W
FranciaNC17D

Welding, Processing, Polishing, Heat Treatment

ProcessDettagli
SaldaturaExcellent weldability using TIG, MIG methods, ensuring strong and reliable joints in corrosive environments.
in lavorazioneMachinable using conventional methods, offering flexibility in fabrication processes.
LucidaturaCapable of achieving smooth finishes for enhanced corrosion resistance and aesthetic appeal.
Trattamento termicoAnnealing at 2050°F (1121°C) followed by rapid quenching optimizes material properties and performance.

Cold Processing, Advantages, and Disadvantages

AspettoDettagli
Lavorazione a freddoRetains ductility and formability at room temperature, facilitating shaping and fabrication.
VantaggiExceptional resistance to a wide range of corrosive chemicals, high mechanical strength, and reliability in harsh environments.
SvantaggiHigher initial cost compared to conventional stainless steels, limited availability of specific shapes and sizes.

Similar Products

Product NameComparison
HASTELLOY C-22 (UNS N06022)Comparable corrosion resistance, with higher chromium and tungsten content in C-22 providing improved resistance to oxidizing media.
INCONEL 625 (UNS N06625)Lower molybdenum content, suitable for moderate to high temperature applications but with lower overall corrosion resistance compared to C276.

Comparison of Similar Products

Property/FeatureHastelloy C276Hastelloy C-22INCONEL 625
Nickel Content (%)57.056.061.0
Molybdenum Content (%)15.0 – 17.012.5 – 14.58.0 – 10.0
Chromium Content (%)14.5 – 16.520.0 – 22.520.0 – 23.0
Tensile Strength (ksi)110 min115 min120 min
Yield Strength (ksi)52 min55 min60 min
Resistenza alla corrosioneExcellent in a wide range of corrosive environments, including strong oxidizers and reducing agents.Excellent in oxidizing and reducing acids, including sulfuric, hydrochloric, and acetic acid.Good resistance to oxidation and corrosion in high-temperature environments.

This comprehensive article provides a detailed introduction to HASTELLOY C276 (UNS N10276), covering 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.