Typical composition of Incoloy 800H alloy:
1.Nickel (Ni): about 30% -35%.
2.Iron (Fe): about 395% -42.0%
3.Chromium (CR): approx. 190% -23.0%
4.Copper (Cu): about 075% -1.5%
5.Aluminum (AL): about 015% -0.60%
6.Carbon(c): 01%
7.Manganese (mn): 15%
8.Silicon (Si): 10%
9.Sulfur (s): 0015%
10.Phosphorus (p): 003%
Common heat treatments for Incoloy 800H alloy:
1.Solution Treatment**: Solution treatment is typically performed in a temperature range of approximately 1200°C - 1370°C. This process aims to dissolve the solid solution and carbide in the alloy so that the alloy achieves a uniform microstructure.
2.Rapid cooling: After solution treatment, rapid cooling (water quenching or air cooling) is required to ensure that the microstructure of the alloy is fixed and its resistance to intergranular corrosion is improved.
3.*Aging Treatment**: Aging treatment is mainly carried out at lower temperatures, usually in the temperature range of 700°C - 1100°C. Aging helps to adjust the strength and creep resistance of the alloy and improve its stability in high-temperature environments.
4.Homogenization: Homogenization is mainly used to further improve the microstructure and properties of the alloy, eliminate possible tissue inhomogeneities and improve the strength and durability of the material.
The following are the general mechanical property characteristics of Incoloy 800H alloy:
1.Tensile Strength: Incoloy 800H exhibits excellent tensile strength at high temperatures, typically around 800°C. Its tensile strength is typically between 520 MPa and 760 MPa.
2.*Yield Strength**: Incoloy 800H also has outstanding yield strength performance, which can maintain good yield performance under high temperature and high stress conditions.
3.Elongation: Compared with general nickel-based alloys, Incoloy 800H has a slightly lower elongation and usually exhibits good elongation at high temperatures and is able to withstand large deformations.
4.*Hardness**: Incoloy 800H has high hardness at high temperatures, can maintain stable hardness values, and has certain wear resistance and fatigue resistance.
5.*Oxidation Resistance**: As a superalloy, Incoloy 800H has excellent oxidation resistance and is able to maintain stable performance in high-temperature oxidation environments.
6.Creep resistance: Incoloy 800H has good creep resistance and can maintain good deformation stability when subjected to continuous loading at high temperatures.
Incoloy 800H is a nickel-iron-chromium alloy with excellent high-temperature strength, oxidation resistance, and creep resistance, making it suitable for a wide range of applications in high-temperature, high-pressure, and corrosive environments. Here are the main uses and application areas of Incoloy 800H::
1.Petrochemical**: Incoloy 800H can be used in the petrochemical industry, such as cracking furnace tubes, heating furnaces, oil refinery towers, pipes and heat exchangers and other components, because of its good high temperature resistance and oxidation resistance.
2.Chemical industry: This alloy is often used in the chemical industry, such as ammonia synthesis plants, chemical equipment under acidic media, chemical reactors and refining units, etc., to cope with high temperatures, high pressures and corrosive environments.
3.*Electric power industry**: Incoloy 800H can be used in boilers, waste heat boilers, flue gas desulfurization equipment, gas turbines and other high-temperature equipment in the power industry to ensure its stable operation in harsh working environments.
4.*Paper Industry**: In the paper industry, Incoloy 800H can be used in steam dryers, acid and alkali media treatment equipment, high-temperature acidic liquid transmission pipelines, etc., to cope with the working environment of high-temperature and corrosive media.
5.Aerospace**: This alloy is also used in aerospace applications such as jet engines, fuel nozzles, combustion chambers, and gas turbines to meet the requirements of high temperatures, high pressures, and corrosive environments.
Overall, the Incoloy 800H plays an important role in a wide range of industrial applications where high temperatures, pressures and corrosive environments are required. Its excellent high-temperature strength, oxidation resistance and creep resistance make it one of the indispensable materials in many special processes and equipment.