Introduction:
Alloy 600 was developed in the 1930s and is the most widely used nickel-chromium alloy. From the late 1950s to the early 1960s, it emerged as a second-generation stress-corrosion-resistant material, replacing 18-8 Cr-Ni austenitic stainless steel in large quantities for nuclear reactor evaporators. This alloy combines corrosion resistance, heat resistance, oxidation resistance, and good machinability and weldability. Due to its simple composition and ease of production, it is relatively low-cost among all nickel-chromium alloys.

Applications:
Alloy 600 offers a combination of toughness and corrosion resistance, making it widely used in chemical, petrochemical, and related industries. Typical applications include heaters, heat exchangers, evaporators, distillation kettles, distillation towers, condensers for fatty acid processing, and equipment for processing rosin acids.

Due to its high strength and excellent oxidation resistance at elevated temperatures, it is also used in the heat treatment industry for manufacturing various structural components. In the nuclear power industry, 0Cr15Ni75Fe alloy exhibits excellent corrosion resistance in high-temperature, high-pressure water, making it a critical structural material for pressurized water reactor (PWR) nuclear power plants.

When used in evaporator heat transfer tubes, the tubes require solution treatment, intermediate-temperature stress-relief treatment, and for U-shaped tubes with small radii, residual stresses must be eliminated. Additionally, this alloy can be used for penetration components on the top and bottom heads of PWR reactor vessels.