Lega INCOLOY® 27-7MO

INCOLOY-Alloy-27-7MO

INCOLOY Alloy 27-7MO (UNS S31277) Product Introduction

Composizione chimica

ElementoComposizione (%)
Nichel (Ni)26.0 – 28.0
Cromo (Cr)26.0 – 28.0
Molibdeno (Mo)6.0 – 7.0
Azoto (N)0.25 – 0.30
Ferro (Fe)Bilancia
Rame1.5 – 2.5
Manganese (Mn)1,0 massimo
Silicon (Si)00,5 massimo
Carbonio (C)00,010 massimo
Fosforo (P)00,030 massimo
Zolfo (S)00,010 massimo

Proprietà meccaniche

ProprietàValore
Resistenza alla trazione, ksi (MPa)115 (795) min
Limite di snervamento (compensazione dello 0,2%), ksi (MPa)55 (380) min
Allungamento (% in 2 pollici)40 minuti
Hardness, Brinell (HB)255 max

Prestazioni a diverse temperature

Intervallo di temperaturaPrestazione
Temperatura ambienteExcellent mechanical properties and corrosion resistance.
Elevated Temperatures (up to 1000°F / 538°C)Maintains strength and oxidation resistance.
Low TemperaturesRetains toughness and ductility down to cryogenic temperatures.

Applicazioni industriali

Settore industrialeApplicazioni
Olio e gasDownhole equipment, subsea pipelines.
PetrolchimicoHeat exchangers, chemical processing equipment.
MarinoOffshore platforms, seawater handling systems.
Produzione di energiaCondensers, boiler components.

Shape, Size, and Production Standards

Forma del prodottoForme disponibiliTaglie disponibiliStandard di produzione
FogliPiatti, FogliVarious thicknessesASTM B688, ASTM B709
BarreBarre tonde, barre esagonaliDiameter rangeASTM B805
Tubi/tubazioniTubi senza saldatura, tubi saldatiVarious dimensionsASTM B690, ASTM B775

Standard e gradi corrispondenti

Paese/regioneStandard/Grado
Stati Uniti d'AmericaUNS S31277
Europa1.4529
GermaniaX1NiCrMoCuN20-18-7
FranciaZ1NCDU20.18.06Az

Saldatura, Lavorazione, Lucidatura, Trattamento Termico

ProcessoDettagli
SaldaturaExcellent weldability using TIG, MIG methods.
in lavorazioneCold and hot forming processes. Machinable with standard methods.
LucidaturaAchieves smooth finishes suitable for sanitary applications.
Trattamento termicoSolution annealing at 2100°F (1150°C) followed by rapid quenching.

Lavorazione a freddo, vantaggi e svantaggi

AspettoDettagli
Lavorazione a freddoExcellent formability and cold workability.
VantaggiHigh resistance to chloride-induced stress corrosion cracking. Good mechanical properties over a wide temperature range.
SvantaggiHigher initial cost compared to standard stainless steels. Requires expertise in welding to prevent sensitization.

Prodotti simili

Nome del prodottoConfronto
Alloy 926 (UNS N08926)Higher molybdenum content, similar applications in aggressive environments.
Alloy 254 SMO (UNS S31254)Higher chromium and molybdenum content, excellent resistance to pitting and crevice corrosion.

Confronto di prodotti simili

Proprietà/funzionalitàINCOLOY Alloy 27-7MO (UNS S31277)Alloy 926 (UNS N08926)Alloy 254 SMO (UNS S31254)
Contenuto di nichel (%)26.0 – 28.024.0 – 26.018.0 – 20.0
Contenuto di cromo (%)26.0 – 28.019.0 – 21.019.5 – 20.5
Contenuto di molibdeno (%)6.0 – 7.06.0 – 7.06.0 – 6.5
Copper Content (%)1.5 – 2.51,5 – 3,000,5 – 1,0
Nitrogen Content (%)0.25 – 0.300.15 – 0.250.18 – 0.22
Resistenza alla trazione (ksi)115 minuti100 min100 min
Limite di snervamento (ksi)55 minuti45 min45 min
Allungamento (%)40 minuti40 minuti35 min
Resistance to SCCHighHighHigh
Typical ApplicationsOil and gas, petrochemical, marineChemical processing, marineChemical processing, marine

This structured presentation provides a detailed overview of INCOLOY Alloy 27-7MO (UNS S31277), encompassing 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 the advantages, disadvantages, and comparable products. Each section is organized into tables to ensure clarity and accessibility of technical specifications and comparisons.