Inconel 600 (Nickel-based alloy for heat exchangers) Encyclopedia
Inconel 600 (UNS N06600) is a nickel-chromium-iron-based high-temperature alloy with excellent high-temperature oxidation resistance, corrosion resistance and good mechanical properties. The alloy can still maintain high strength in high temperature environments and is widely used in aerospace, chemical, nuclear industry and other fields.
Inconel 600 chemical composition:
Element content (%)
Ni (nickel) ≥72.0
Cr (chromium) 14.0~17.0
Fe (iron) 6.0~10.0
C (carbon) ≤0.15
Mn (manganese) ≤1.0
Si (silicon) ≤0.5
Cu (copper) ≤0.5
S (sulfur) ≤0.015
Inconel 600 for heat exchangers international standard comparison:
US: ASTM B168 / UNS N06600
Europe: EN 2.4816
China: NS312 (GB/T 15007)
Inconel 600 physical and mechanical properties:
Performance value
Density 8.47 g/cm³
Melting point 1354~1413°C
Tensile strength 550~760 MPa
Yield strength 240~550 MPa
Elongation 30~55%
Hardness 150~220 HB
Core features of Inconel600:
High temperature stability: Can be used for a long time at 1093°C, and can withstand a short-term temperature of 1177°C.
Corrosion resistance: Resistant to chloride ion stress corrosion cracking, acid, alkali and high temperature oxidation.
Processing performance: Good hot and cold processing performance, but attention should be paid to work hardening.
Heat treatment and processing technology of Inconel600:
(1) Heat treatment
Annealing: Rapid cooling (water quenching or air cooling) at 871~982°C to eliminate stress and optimize ductility.
Stress relief: Slow cooling at 593~816°C, suitable for welding or cold processing post-processing.
(2) Weldability
Recommended methods: TIG welding, MIG welding, plasma welding, use matching welding materials (such as ERNiCr-3).
Precautions: Avoid staying at high temperature for too long to prevent intergranular corrosion.
(3) Cutting processing
Higher difficulty: It is recommended to use carbide tools, low-speed and high-feed cutting, and use coolant to reduce thermal effects.
Typical applications of Inconel600:
Aerospace: engine combustion chambers, turbine sealing rings, high-temperature fasteners.
Chemical equipment: acid treatment containers, heat exchangers, reactor pipes.
Nuclear industry: nuclear reactor control rod guide tubes, steam generator pipes.
Others: heat treatment furnace components, electronic component sheaths.
Inconel600 compared with other nickel-based alloys:
Alloy Type Temperature resistance Corrosion resistance Typical applications
Inconel 600 Ni-Cr-Fe 1093°C Excellent High temperature oxidizing environment
Inconel 625 Ni-Cr-Mo 982°C Excellent Marine/chemical corrosion-resistant parts
Hastelloy C276 Ni-Mo-Cr 538°C Excellent Strong acid environment
Inconel 600 has become a key material in extreme environments due to its high temperature strength and corrosion resistance. During processing, attention should be paid to the heat treatment process and welding control to give full play to its performance.
