What Is Inconel 602CA? Composition, Properties and Industrial Applications

（Inconel 602CA UNS N06025 is a nickel-based superalloy with excellent high temperature oxidation resistance. Learn its chemical composition, mechanical properties and main industrial usage. We supply standard and custom Inconel 602CA products worldwide.）

When engineering for extreme thermal environments where standard nickel-chromium alloys fail due to oxide spallation or creep deformation, Inconel 602CA (UNS N06025 / W.Nr. 2.4633)​ stands out as a specialized solid-solution strengthened superalloy. Designed for continuous operation up to 1200°C (2192°F), this high-carbon Ni-Cr-Fe alloy incorporates micro-additions of Aluminum, Yttrium, and Zirconium to deliver superior cyclic oxidation resistance and high-temperature strength. Shanghai COCESS Special Alloys Co., Ltd​ supplies fully certified Inconel 602CA in plate, bar, seamless pipe, and forged configurations, strictly adhering to ASTM B166, B168, and B564 standards to support critical thermal processing and petrochemical infrastructure globally.

Chemical Composition and Metallurgical Design

The defining characteristic of UNS N06025 is its balanced chemistry, optimized for forming a tenacious, adherent Al₂O₃/Cr₂O₃ scale while maintaining grain boundary integrity at extreme temperatures. The controlled high carbon content facilitates strengthening carbide networks.

Chemical Composition (Weight %):

• Nickel (Ni): Balance (Approx. 58-63%)

• Chromium (Cr): 24.0 – 26.0% (Essential for Cr₂O₃ scale and oxidation resistance)

• Iron (Fe): 8.0 – 11.0% (Matrix stabilizer, cost optimization)

• Aluminum (Al): 1.80 – 2.40% (Critical for forming adherent Al₂O₃, preventing scale flaking)

• Carbon (C): 0.15 – 0.25% (Higher than standard alloys; promotes M₂₃C₆/M₇C₃ carbides for creep strength)

• Yttrium (Y): 0.05 – 0.12% (Rare earth element that pegs the oxide scale to the base metal, drastically reducing spallation during thermal cycling)

• Zirconium (Zr): 0.01 – 0.10% (Grain boundary strengthening, refines carbide distribution)

• Titanium (Ti): 0.10 – 0.20% (Minor contribution to precipitation/stability)

• Manganese (Mn): ≤ 0.15%

• Silicon (Si): ≤ 0.50%

• Sulfur (S): ≤ 0.010% (Minimized for hot workability and ductility)

Physical and Mechanical Properties

Inconel 602CA retains significant mechanical integrity at temperatures where Alloy 600 or 601 begin to soften rapidly. Data below reflects the solution-annealed condition.

Physical Constants:

• Density: 7.89 – 8.08 g/cm³ (0.285 lb/in³)

• Melting Range: 1340 – 1400 °C (2435 – 2550 °F)

• Thermal Conductivity (20°C): ~11.3 W/m·K

• Coefficient of Thermal Expansion (20-1000°C): ~16.5 – 17.5 x 10⁻⁶/K

• Specific Heat (20°C): ~450 J/kg·K

Mechanical Properties (Room Temperature Minimum / Typical):

• Tensile Strength (Rm): ≥ 675 – 680 MPa (≥ 98 ksi)

• Yield Strength (Rp0.2): ≥ 270 MPa (≥ 39 ksi)

• Elongation (A5): ≥ 30 – 38%

• Hardness: Typically < 200 HB (Solution Annealed)

High-Temperature Performance:

• Creep Rupture: Exhibits up to 150% higher creep rupture strength compared to Alloy 601 at 1000°C+, thanks to the high-carbon carbide network.

• Oxidation Limit: Rated for continuous service up to 1200°C (2192°F). The Yttrium addition ensures the oxide scale remains adherent even under severe thermal cycling (heating/cooling), preventing product contamination in heat treat furnaces.

Key Industrial Applications

Shanghai COCESS provides Inconel 602CA for sectors where resistance to extreme heat, carburization, and scaling is non-negotiable:

• Thermal Processing & Furnace Technology: Furnace rollers (roller hearth furnaces), radiant tubes, muffle furnaces, annealing covers, and high-temperature baskets/fixtures. The alloy's low spallation rate prevents contamination of heat-treated parts.

• Petrochemical & Chemical Processing: Ethylene pyrolysis furnace tubing, reformer outlets, methanol/ammonia synthesis converters, and components exposed to carburizing (metal dusting) atmospheres. The high Al and Cr content act as a barrier against carbon ingress.

• Environmental & Energy: Waste incineration grates (resisting high-temp corrosion/sulfur), glass industry mandrels, and components for radioactive waste vitrification plants.

• High-Temperature Fasteners/Hardware: Specialized bolts or supports requiring retention of preload and strength above 800°C.

Supply Standards and Material Availability

We stock and process Inconel 602CA (UNS N06025) conforming to the following specifications:

• Bar, Rod, Forgings, Rings: ASTM B166, ASTM B564, ASME SB166, SB564

• Plate, Sheet, Strip: ASTM B168, ASME SB168

• Seamless Pipe & Tube: ASTM B167, B163

• Welding Consumables: Typically ERNiCrFe-12 (AWS A5.14) to match the base material's high-temperature properties.

All products from Shanghai COCESS Special Alloys Co., Ltd​ are delivered with EN 10204 3.1 Mill Test Reports, ensuring full traceability from melt to finished product. For technical inquiries, stock availability on Inconel 602CA plates or bars, or project-specific quotations, contact our technical sales team to ensure your high-temperature application is backed by verified material data.

Website: https://en.cocessalloys.com
Email: sales@cocessalloys.com