Q1. What are the differences between Inconel, Incoloy, and 20 Alloy Steel plates/sheets?
A1.
Inconel 625 (N06625): Nickel-chromium-molybdenum alloy with excellent corrosion resistance, high-temperature strength, and oxidation resistance.
Inconel 600/601: High-nickel alloys; 600 is strong against corrosion and heat, 601 offers superior oxidation resistance at very high temperatures.
Inconel 718: Precipitation-hardened superalloy with excellent tensile strength, creep resistance, and fatigue strength at temperatures up to ~700°C.
Inconel 686: Optimized for resistance to aggressive chemical environments (acids and chlorides).
Incoloy 800: Nickel-iron-chromium alloy with high-temperature strength and resistance to oxidation and carburization.
20 Alloy Steel (commonly 20Cr or 20Mn): Low-alloy steel for moderate strength and toughness; mainly for structural and mechanical applications.
Q2. What are the main applications of these plates and sheets?
A2.
Aerospace: Turbine blades, exhaust systems, and combustion components (Inconel 718, 625, 600).
Chemical and petrochemical: Reactors, heat exchangers, piping, acid-resistant vessels (Inconel 686, Incoloy 800).
Power generation: Boilers, superheaters, turbine components (Inconel 718, 625, Incoloy 800).
Marine and offshore: Seawater-resistant pumps and structures (Incoloy 800, Inconel 625).
Mechanical/structural: Components needing moderate strength at ambient temperature (20 Alloy Steel).
Q3. What dimensions, thicknesses, and surface finishes are available?
A3.
Thickness: Typically 0.5 mm up to 200 mm (depending on material and rolling capability).
Dimensions: Standard plates up to 3000×12000 mm; custom cut-to-size sheets available.
Surface finishes: Polished, hot-rolled, cold-rolled, pickled, or bright annealed.
Heat treatment: Solution-annealed, precipitation-hardened (for Inconel 718), or stress-relieved.
Q4. How do these materials perform in high-temperature and corrosive environments?
A4.
Inconel 625/718: Excellent high-temperature strength, oxidation, and hot corrosion resistance.
Inconel 600/601: Good oxidation resistance and moderate high-temperature strength.
Inconel 686: Superior resistance to acids, chlorides, and other aggressive chemicals.
Incoloy 800: High-temperature oxidation and carburization resistance.
20 Alloy Steel: Suitable for moderate strength applications; not ideal for high-temperature or highly corrosive environments.
Q5. How should these plates and sheets be stored and handled?
A5.
Store in a dry, ventilated warehouse to prevent corrosion.
Avoid contact with chemicals, oils, or abrasive surfaces that may damage the finish.
Use gloves or clean tools to maintain polished surfaces.
Stack horizontally with separators to prevent scratches and warping.
Inspect surface quality, thickness, and dimensions before processing or shipment.
