Inconel alloy 602CA/UNSN06025/W.Nr. 2.4633 bar Tube

--Expert Guide to High-Temperature Nickel Alloy Selection

Discover the key properties and applications of Inconel 602CA (UNS N06025) for furnace tubes and high-temperature components. Learn how to choose between bar and tube forms for optimal performance in oxidizing and carburizing environments up to 1200°C.

Inconel alloy 602CA (UNS N06025 / W.Nr. 2.4633) is a typical high-temperature nickel alloy, possessing resistance to oxidation, carburization, and creep at high temperatures. Distinguishing between the application boundaries of bars and tubes is beneficial for using the material in corresponding furnace tubes, heat treatment components, and high-temperature chemical equipment.

Performance Characteristics of 602CA 

602CA is a Ni-Cr-Fe high-temperature alloy, typically containing 24.0–26.0% Cr and 1.8–2.4% Al, with trace amounts of Y added to enhance oxide film stability. It can form a dense protective layer in cyclic high-temperature environments, suitable for oxidation and carburization conditions up to approximately 1200°C. The standard for this material's bars is generally ASTM B166, and for tubes, ASTM B167. When purchasing, these standards can be used to verify delivery standards, dimensional requirements, and inspection documents, making it particularly suitable for core furnace components requiring resistance to carburization and thermal fatigue.

How to Choose Between Bar and Tube

Tube: Focus on outer diameter, wall thickness uniformity, and heat treatment consistency. Suitable for radiant tubes, protective sleeves, and high-temperature gas conveying.

Bar: Focus on strength, straightness, and machining allowance. Suitable for support components, fixtures, connectors, and other load-bearing or machined parts.

Typical Applications and Procurement Priorities

Under long-term thermal cycling conditions, the integrity and structural stability of the material's antioxidant film directly affect its lifespan. 602CA is commonly used in radiant tubes, muffle furnace components, heat treatment fixtures, and high-temperature chemical plants. For high-temperature equipment, batch consistency, heat treatment stability, and traceability are often more important than simply low price. When purchasing, confirm: whether the delivery condition is solution treated; whether MTC and PMI are provided; and whether dimensional tolerances and surface quality meet the requirements for long-term high-temperature service.

MTSCO's Professional Support: For high-temperature nickel alloy projects like 602CA, MTSCO can leverage its Factory Complex supply system to coordinate bar, tube, and related processing resources. Through PMI re-inspection, process traceability, NDT, and third-party inspection support, MTSCO helps customers more reliably complete the selection of high-temperature materials and project delivery.