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ISO/TR 15608 Material Group 46

ISO/TR 15608 Material Group 46: Nickel-chromium-cobalt alloys (Ni-Cr-Co) with Ni ≥ 45 % and Co ≥ 10 %

Features of Nickel-chromium-cobalt alloys

These alloys are solid-solution-strengthened nickel-cobalt-chromium-silicon alloys with outstanding resistance to various forms of high-temperature corrosion attack. They have an excellent resistance to sulfidation and chloride attack in both reducing and oxidizing atmospheres. The alloys also have exceptionally good resistance to oxidation, hot corrosion, carburisation, metal dusting, nitridation, and corrosion attack by low melting point compounds such as those formed by phosphorus, vanadium, and other impurities.

Application such as Alloy 617

The combination of high strength and oxidation resistance at temperatures over 980°C makes Alloy 617 an attractive material for such components as ducting, components of power-generating plants, combustion cans, and transition liners in both aircraft and land-based gas turbines. That characteristic, combined with good resistance to oxidizing and carburizing atmospheres, makes the alloy especially suitable for long-term, high-stress use at elevated temperatures. Alloy 617 has excellent weldability.

Applications of Nickel-chromium-cobalt alloys

The alloys are especially suited for applications in high temperature corrosive environments generated by combustion of low grade fuels or processing of chemical feed stocks with corrosive contaminants such as sulfur, chlorine, fluorine, vanadium, phosphorus, and others. The alloys are capable of withstanding temperatures up to 1200 °C.  It is widely used in recuperators, heat exchangers and waste heat recovery systems. Alloys are also suitable for utility boilers, sulfur plants, high-temperature furnaces, kilns, calciners, resource recovery units, cement kilns, pulp and paper recovery boilers, coal gasification systems, and fluidized-bed combustion systems.

Name / GradeNumberStandardProductAlloy/TrademarkRemarks
NiCr20Co18Ti
2.4632
N07090


NIMONIC® Alloy 90EN 13445-10: PMA
NiCo20Cr20MoTi
2.4650
N07263


NIMONIC® Alloy 263
Nicrofer 5020CoTi
EN 13445-10: PMA
NiCr20Co13Mo4Ti3Al
2.4654
N07001
EN 10269
Fasteners/Bar
HAYNES® Waspalloy alloyEN 13445-2/-10
NiCr23Co12Mo



2.4663
N06617
N06617
N06617
N06617
EN 10302
ASTM B-166
ASTM B-167
ASTM B-168
ASTM B-564

Bar
Smls. pipe & tube
Plate
Forging
INCONEL® Alloy 617
Nicrofer 5220Co
EN 13445-10: PMA
ASME BPVC
ASME BPVC
ASME BPVC
ASME BPVC
NiCr25Co20TiMo2.4878
NiCo29Cr28Si






2.4880
N12160
N12160
N12160
N12160
N12160
N12160
N12160

ASTM B-366
ASTM B-435
ASTM B-564
ASTM B-572
ASTM B-619
ASTM B-622
ASTM B-626

Fittings
Plate
Forging
Rod
Welded pipe
Smls. pipe & tube
Welded tube

HAYNES®
HR-160®
alloy

ASME BPVC
ASME BPVC
ASME BPVC
ASME BPVC
ASME BPVC
ASME BPVC
ASME BPVC
Table: Typical materials