What material is Incoloy800H?
Incoloy800H/alloy800H high carbon alloy has a carbon content between 0.05 and 0.10. It is mainly used at temperatures above 600 degrees. It has the characteristics of coarse grains, high creep strength, good mechanical properties and corrosion resistance. Superheaters, reheaters, high-temperature heating, conversion and cracking furnace tubes in chemical industry, electric power, and petrochemical industry.
Incoloy800H/alloy800H chemical composition: Carbon C: 0.05~0.10, Silicon Si: ≤1.0, Manganese Mn: ≤1.50, Chromium Cr: 19~23, Nickel Ni: 30.0~35.0, Aluminum Al: ≤0.15~0.6, Titanium Ti: ≤ 0.15~0.6 Iron Fe: 0.05~ balance, copper Cu: ≤0.75, phosphorus P: ≤0.030, sulfur S: ≤0.015. You have also seen the composition list of this alloy. In fact, the carbon content of this alloy is different from that of 800. Change, the temperature will be slightly different when used.
There are also differences in the names of Incoloy800H/alloy800H: National standard: NS1102, NS112, 0Cr21Ni32AlTi, American standard: Incoloy800H/alloy800H, No8810, German standard: 1.4958, X5NiCrAlTi31-20.
Incoloy800H/alloy800H corrosion resistance: The alloy has good resistance to corrosion by HNO3, organic acids, oxidizing and non-oxidizing salts except halogen salts. In particular, it is resistant to high temperature corrosion and has good resistance to carburization. Intergranular corrosion will occur when the alloy is heated between 593 and 816, and it has good resistance to stress corrosion. However, long-term aging at 650 degrees may significantly reduce the stress corrosion sensitivity of the alloy. In NaOH, NACL stress resistance depends on concentration and level. It has good resistance to stress corrosion cracking in water chloride, corrosion resistance to steam, air and carbon dioxide mixtures, resistance to HNO3, HCOOH, CH3COOH, CH3CH2COOH and other organic acids. It has good corrosion resistance, but has been Heating will cause sensitization and intergranular corrosion. It can only resist low-concentration sulfur and HCl corrosion. It has good corrosion resistance to organic acids and flowing seawater. However, sediments will form on the surface in stagnant seawater, and Cause severe corrosion cracks.
Incoloy800H/alloy800H processing and welding: The hot processing performance is good, the hot processing temperature is 900~1200 degrees, and the hot bending forming is 1000~1150 degrees. In order to reduce the intergranular corrosion tendency of the alloy, it should be passed through the 540~760 degree sensitization zone as quickly as possible. Intermediate softening annealing is required during cold working. The heat treatment temperature is 920~980. The solid solution temperature is 1150~1205. The welding performance is good and the conventional welding method is used.
Incoloy800H/alloy800H physical properties: density 8.0g/cm3, melting point: 1350~1400 ℃, specific heat capacity: 500J/kg.K, resistivity: 0.93, elastic modulus: 200 MPa.
Incoloy800H/alloy800H application fields: superheaters, reheaters, high-temperature heating, conversion cracking furnace tubes, etc. in the chemical, electric power, and petrochemical industries.
