Leveraging Excellence: High-Nickel Steel Alloys in Nicro’s Consulting (Part 1)

In the development and construction of industrial artifacts, the choice of materials plays a crucial role in various applications. Among the different options available, high-nickel steel alloys are often an effective choice due to their superior performance and ability to adapt to various needs across industrial sectors.

Each alloy (Alloy-601H, Alloy-602CA, Alloy-800H, and Inconel-617) has its own benefits and advantages in terms of application and resistance, making it more or less suitable for different uses.

Alloy-601H

Alloy 601 H, or Nicrofer 6023 H, is a nickel-chromium-iron-based superalloy, strengthened by the addition of aluminum and titanium, known for its exceptional resistance to oxidation at high temperatures and in extremely corrosive and acidic environments, allowing it to maintain its mechanical properties even under stress conditions.

For this reason, Alloy 601 H steel finds wide application in chemical and petroleum industries. Its resistance to carburization and oxidation makes it ideal for refining processes as well. Nicrofer 6023 H is recommended for applications in sectors where temperatures exceed 550 °C (1022 °F) due to its resistance to deformation and breakage because of its low carbon content. Typical applications include:

Alloy-602CA

Alloy 602 CA is in turn a nickel-chromium-based superalloy Nicrofer (Nicrofer 6025 HT). It is a high-carbon content nickel-chromium-iron-based alloy, with additions of titanium, zirconium, aluminum, and yttrium.

Alloy 602 CA, in addition to the excellent deformation and fracture resistance typical of Nicrofer alloys, is characterized by robustness both in the high-cycle fatigue (HCF) regime and in the low-cycle fatigue (LCF) regime. High-temperature oxidation resistance is present even under cyclic conditions, and in carburizing and oxidizing/chlorinating environments. Subjected to these stresses, Nicrofer 6025 HT steel is not subject to the so-called “metal dusting” phenomenon, an extreme form of corrosion that rapidly pulverizes high-carbon content metals.

Thanks to the strength of artifacts up to 1200°C (approximately 2200°F) in oxidizing environments, Alloy 602 CA is often used in a wide range of applications in the heat treatment, chemical and petrochemical industries, as well as in the construction of equipment for power plants. Typical applications include:

High-nickel steel alloys thus represent a valid solution for industrial applications requiring high performance at high temperatures and with high corrosion resistance. For your artifacts, therefore, rely on Nicro’s experience and consulting: for almost fifty years, we have been developing and building high-nickel steel alloy artifacts for all industrial applications.

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