Nickel-chromium alloy: a warrior in the field of high temperature and corrosion resistance
Date:2025-05-15View:18Tags:SSAW steel pipe,LSAW steel pipe,Epoxy pipe
I. Nickel-chromium alloy (Nickel-Chromium Alloys) is a metal material with nickel (Ni) and chromium (Cr) as the main components. The nickel content is usually 50%-80%, the chromium content is 10%-30%, and iron (Fe), molybdenum (Mo), aluminum (Al) and other elements may be added to optimize performance. This type of alloy has become an indispensable functional material in modern industry due to its high temperature resistance, oxidation resistance, and corrosion resistance.
II. Core characteristics
1. Excellent high temperature stability
Nickel-chromium alloy can still maintain high strength at high temperatures, and the working temperature can reach 1000-1200℃ (such as NiCr 80/20).
Chromium elements form a dense Cr₂O₃ oxide layer in a high temperature environment, which effectively blocks oxygen from further corroding the matrix.
2. Excellent electrical properties
High resistivity (e.g. NiCr 60/15 resistivity is about 1.1 μΩ·m), and the resistance changes little with temperature, which is suitable for manufacturing precision resistance elements.
3. Outstanding corrosion resistance
Performs well in acid, alkali, salt and high-temperature water vapor, especially has strong resistance to chloride stress corrosion.
4. Good processing performance
Can be processed into wire, plate or complex parts through forging, rolling, wire drawing and other processes, and some alloys can be welded.
3. Typical grades and application areas
Grade: NiCr 80/20 Composition characteristics 80% Ni, 20% Cr Main uses: Heating wire, industrial heating elements
Grade: Inconel 600 Composition characteristics Ni-Cr-Fe, containing a small amount of Cu and Mn Main uses: Nuclear reactor components, chemical reactors
Grade: Nichrome V Composition characteristics Ni 80%, Cr 20% Main uses: Laboratory high temperature equipment, resistance heaters
Grade: Hastelloy C Composition characteristics Ni-Cr-Mo-W (high corrosion resistance) Main uses: Equipment in strong acid environments (such as sulfuric acid and hydrochloric acid)
