Cr20Ni30 Austenitic Stainless Steel Alloy For Superior Mechanical Properties

Product Specification

Cr20Ni30 The Austenitic Stainless Steel Alloy for Superior Mechanical Properties and More

NiCr Alloy Wire Cr20Ni30 is a nickel-chromium-based alloy consisting of 20% chromium and 30% nickel, designed primarily for high-temperature applications, oxidation resistance, and electrical resistivity. This alloy is widely used in environments that require durability under heat and exposure to oxidizing atmospheres, such as in industrial heating elements, resistors, and high-temperature furnace applications. NiCr Alloy Wire Cr20Ni30 is a versatile and durable alloy suitable for high-temperature environments, offering excellent oxidation resistance, stable electrical resistivity, and mechanical strength. Commonly used in applications such as heating elements, resistors, and industrial furnaces, it excels in environments where both high heat and electrical resistivity are critical. While more expensive than common materials, its performance in extreme conditions makes it a preferred choice for specialized industrial uses, including electrical heating and thermal applications.

Main characteristics of Ni-Cr and Ni-Cr-Fe electric heating alloys

Key Features of NiCr Alloy Wire Cr20Ni30:

• Composition:

Nickel (Ni): 30% (provides stability and resistance to oxidation at elevated temperatures).

Chromium (Cr): 20% (gives the alloy excellent resistance to oxidation and scaling).

Iron (Fe): Balance (adds to the structural integrity and forms the base of the alloy).

Other Elements: Minor amounts of manganese, silicon, and carbon to improve mechanical properties, formability, and welding characteristics.

• High-Temperature Resistance:

Oxidation Resistance: With its chromium content, this alloy forms a protective oxide layer that prevents further degradation from oxidation, even at temperatures up to 1000°C (1832°F).

Thermal Fatigue Resistance: The alloy resists thermal cycling, making it suitable for applications with fluctuating temperatures, such as in furnaces or heating systems.

• Electrical Resistivity:

Moderate Electrical Resistivity: This alloy provides stable electrical resistance at elevated temperatures, making it ideal for use in resistors, heating elements, and temperature sensors.

Stable Resistance: The alloy’s resistive properties are stable even under thermal stress, which is critical for precision heating and electrical components.

• Corrosion and Scaling Resistance:

Oxidation Resistance: Forms an oxide layer that shields the material from oxidative damage, allowing it to withstand high-temperature environments.

Sulfidation Resistance: Performs well in sulfur-rich atmospheres, making it suitable for applications like industrial furnaces or environments involving gas streams that contain sulfur.

• Mechanical Properties:

Tensile Strength: The alloy maintains good tensile strength at high temperatures, making it durable under mechanical stress.

Ductility: Although the alloy is strong, it retains sufficient ductility to allow for easy forming into wires, strips, or other shapes.

• Weldability and Fabrication:

Weldability: NiCr Alloy Cr20Ni30 can be welded using standard methods such as TIG (Tungsten Inert Gas) and MIG (Metal Inert Gas) welding, ensuring a strong bond with minimal risk of cracking.

Formability: The alloy can be easily drawn into wires, rods, and strips, making it versatile for a wide range of applications in electrical heating, industrial equipment, and other high-temperature applications.

Applications:

• Heating Elements: Ideal for use in electric furnaces, ovens, dryers, and other high-temperature heating systems.
• Resistors and Thermocouples: Suitable for resistive heating elements and temperature sensors used in high-temperature environments.
• Industrial Furnaces and Kilns: Commonly used for radiant tubes, furnace components, and heat exchangers due to its excellent resistance to oxidation and thermal cycling.

Technical data of wires

The tolerance or wires diameter

Technical data of ribbon

Advantages of NiCr Alloy Wire Cr20Ni30:

• High-Temperature Stability: The alloy remains stable and performs well at temperatures up to 1000°C (1832°F), making it ideal for industrial heating and electrical applications.
• Excellent Oxidation and Corrosion Resistance: Resistant to oxidation, scaling, and corrosion, ensuring a long service life even in harsh environments.
• Electrical Resistivity: Provides stable and reliable electrical resistance, perfect for use in heating elements and resistive applications.
• Durability in Thermal Cycling: Performs well in environments with fluctuating temperatures, ensuring reliability in applications like furnaces and thermal processing.
• Ease of Fabrication and Welding: Easy to process into wires, strips, and other forms for various applications. It can also be welded using common techniques.

Limitations of NiCr Alloy Wire Cr20Ni30:

• Cost: Due to its nickel and chromium content, it is generally more expensive than other alloys like stainless steel, making it less economical for large-scale applications where these elements are not required.
• Limited Resistance to Highly Acidic Environments: While it resists oxidation, it may not perform well in highly acidic or chloride-rich environments, where specialized alloys (e.g., Inconel) may be more effective.
• Work Hardening: This alloy may harden during cold working, which could require additional processing steps for machining or forming.