Inconel explained
Inconel is a premium family of nickel–chromium-based superalloys specifically engineered for extreme temperature, high-pressure, and corrosive environments where ordinary steels and conventional alloys fail. Unlike standard stainless steels, Inconel maintains exceptional strength, oxidation resistance, and corrosion stability at elevated temperatures, making it indispensable in severe thermal and chemical service. Its high nickel content ensures outstanding resistance to chloride stress corrosion cracking, carburization, and scaling even under continuous heat exposure. Inconel alloys are widely used across aerospace, power generation, oil & gas, chemical processing, and marine industries.
Key commercial grades include Inconel 600, 601, 625, and 718, each designed for specific high-performance applications. Inconel 600 offers excellent resistance to corrosion and high-temperature oxidation in both oxidizing and reducing environments. Inconel 601 provides superior resistance to high-temperature oxidation and carburization in thermal processing equipment. Inconel 625 is renowned for its exceptional strength, outstanding fatigue resistance, and superior protection against pitting and crevice corrosion in seawater and acidic media. Inconel 718 is a precipitation-hardened alloy known for extremely high tensile strength, creep rupture resistance, and excellent performance in aerospace turbines, rocket motors, and high-stress mechanical systems.
Incoloy explained
Incoloy is a family of nickel–iron–chromium superalloys developed to offer excellent resistance to oxidation, carburization, and corrosion at both moderate and high temperatures, while maintaining good mechanical strength and fabricability. Unlike Inconel, which is nickel-dominant, Incoloy contains a higher proportion of iron, making it a more cost-effective solution for high-temperature and corrosive service without compromising long-term performance. Incoloy alloys are extensively used in heat exchangers, furnace equipment, chemical processing systems, power plants, and petrochemical industries.
Major industrial grades include Incoloy 800, 800H, 800HT, and 825. Incoloy 800 provides excellent resistance to oxidation, carburization, and general corrosion at elevated temperatures. Incoloy 800H features controlled higher carbon content for improved creep and rupture strength in high-temperature structural applications. Incoloy 800HT offers further enhanced high-temperature strength with optimized aluminum and titanium additions for superior thermal stability in furnace and heat treatment systems. Incoloy 825 is specifically engineered for outstanding resistance to sulfuric and phosphoric acids, chlorides, and seawater, making it ideal for chemical processing, pollution control, and marine piping systems.
The materials we supply undergo a comprehensive range of quality assurance procedures, including eddy current testing, hydrostatic testing, ultrasonic examination, and other essential NDT methods, along with detailed chemical and mechanical property evaluations. Each product is thoroughly inspected at multiple stages of manufacturing to ensure it is free from defects and suitable for demanding industrial applications. Our rigorous testing standards guarantee consistent quality and reliability. In addition, all products are manufactured in accordance with relevant industry norms and specifications, making them fully compliant and widely accepted in both domestic and international markets.
Inconel 600
- Nickel–Chromium–Iron alloy
- Excellent resistance to oxidation & general corrosion
- Performs well in both oxidizing & reducing atmospheres
- Minimum tensile strength: ~550 MPa
- Good resistance to chloride stress corrosion cracking
- Stable at elevated temperatures
- Used in heat exchangers, furnace components & reactors
- Resistant to caustic alkalis and dry chlorine gas
- Preferred for general high-temperature corrosion service
Inconel 601
- Nickel–Chromium alloy with aluminum addition
- Outstanding resistance to high-temperature oxidation
- Excellent carburization resistance
- Minimum tensile strength: ~600 MPa
- Excellent scale resistance above 1000°C
- Good mechanical strength at elevated temperatures
- Used in thermal processing & furnace equipment
- Resists sulfur-bearing gases
- Ideal for long-term heat service applications
Inconel 625
- Nickel–Chromium–Molybdenum–Niobium alloy
- Exceptional fatigue & creep resistance
- Outstanding resistance to pitting & crevice corrosion
- Minimum tensile strength: ~827 MPa
- Excellent resistance to seawater & marine corrosion
- High strength without heat treatment
- Used in marine, aerospace & oil & gas industries
- Resistant to stress corrosion cracking
- Preferred for extreme corrosion & pressure environments
Inconel 718
- Precipitation-hardened Nickel–Chromium alloy
- Extremely high tensile & yield strength
- Outstanding creep & rupture resistance
- Minimum tensile strength: ~1030 MPa
- Excellent fatigue resistance at high temperatures
- Superior weldability compared to other high-strength alloys
- Used in aerospace turbines, rocket motors & fasteners
- Resists oxidation & corrosion at extreme temperatures
- Preferred for high-stress aerospace applications
Incoloy 800
- Nickel–Iron–Chromium alloy
- Excellent resistance to oxidation & carburization
- Stable microstructure at high temperatures
- Minimum tensile strength: ~500 MPa
- Good general corrosion resistance
- Used in heat exchangers & furnace components
- Good weldability & fabrication properties
- Resistant to scaling at elevated temperatures
- Preferred for structural heat service
Incoloy 800H
- Controlled carbon version of Incoloy 800
- Improved creep & stress rupture strength
- Excellent oxidation resistance
- Minimum tensile strength: ~520 MPa
- Superior high-temperature structural stability
- Used in reformers, furnaces & heat treatment units
- Enhanced grain size for creep resistance
- Performs well in carburizing atmospheres
- Preferred for continuous high-temperature service
Incoloy 800HT
- Nickel–Iron–Chromium with Ti & Al additions
- Superior creep & rupture resistance vs 800H
- Exceptional high-temperature strength
- Minimum tensile strength: ~540 MPa
- Outstanding oxidation & carburization resistance
- Used in cracking tubes & high-temp furnace fixtures
- Resists metal dusting & thermal fatigue
- Stable in cyclic high-temperature environments
- Best for extreme furnace atmospheres
Incoloy 825
- Nickel–Iron–Chromium with Mo & Cu
- Exceptional resistance to sulfuric & phosphoric acids
- Outstanding resistance to chlorides & seawater
- Minimum tensile strength: ~586 MPa
- Excellent pitting & crevice corrosion resistance
- Used in chemical processing & marine piping
- Highly resistant to stress corrosion cracking
- Performs well in mixed acid environments
- Preferred for aggressive chemical service
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