Super Alloy Incoloy 903 (UNS N19903)

Date:2024-04-12 15:31:01View:155Tags:Nickel Alloy Supplier

Incoloy 903 has excellent corrosion resistance and is approximately twice as strong as annealed Inconel 600. Incoloy 903 is resistant to high temperature corrosion and is a more modern and sophisticated material. This alloy can withstand higher temperatures while providing excellent resistance to metal dust. The high content of nickel in the composition of Incoloy 903 protects it from stress corrosion cracking in chloride or sodium hydroxide environments. The maximum operating temperature of Incoloy 903 is 1026℃~1331℃. Incoloy 903 typically contains tungsten, which has the highest melting point of all metals, and the alloy can be welded using certain techniques, such as gas tungsten arc welding, submerged arc welding, and shielded metal arc welding. This alloy is widely used in aeronautics, shipbuilding, chemical engineering and oil extraction due to its high thermal stability and corrosion resistance. It can be used to manufacture equipment and parts such as high-pressure turbines, engine components, high-temperature pipes and heat exchangers.

Chemical Composition

Element	Content (%)
Iron, Fe	42
Nickel, Ni	38
Cobalt, Co	15
Niobium, Nb	3
Titanium, Ti	1.4
Aluminum, Al	0.9

Physical Properties

Properties	Metric	Imperial
Density	8.25 g/cm³	0.298 lb/in³
Melting point	1385°C	2525°F

Mechanical Properties

Properties	Metric	Imperial
Tensile strength (precipitation hardened)	1310 MPa	190000 psi
Yield strength (@ strain 0.200 %, precipitation hardened)	1100 MPa	160000 psi
Elastic modulus (@ 0°C/32°F)	146.8 GPa	21290 ksi
Poisson's ratio (@ 250°C/482°F)	0.226	0.226
Elongation at break (precipitation hardened)	14%	14%

Thermal Properties

Properties	Metric	Imperial
Thermal expansion co-efficient (@ 25-427°C/77-801°F)	7.65 µm/m°C	4.25 µin/in°F
Thermal conductivity	16.7 W/mK	116 BTU in/hr.ft².°F

Compared to other nickel-based alloys, Incoloy 903 has higher hardness and strength and can withstand higher temperatures and heavy loads. In addition, it has good plasticity and fatigue strength and can be used in high-stress environments for a long time.

However, due to its high cost and manufacturing difficulty, Incoloy 903 alloy has limited application range. At present, some advanced casting and smelting technologies have been applied in its production to improve quality and production efficiency. This will help reduce the cost of Incoloy 903 and enable its application in more areas.

In summary, Incoloy 903 is an extremely high-performance nickel-based alloy that can be used in high temperatures and corrosive environments. Its outstanding mechanical properties and corrosion resistance make it widely used in high-tech industries. Although the cost is higher, with the development and improvement of technology, its application prospects are still very broad.