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Short Description:
Alloy 602CA is a high carbon chromium-iron-nickel alloy which also contains additives of microalloy elements titanium, zirconium and aluminum, and yttrium.
Product Description
Inconel 602CA is one of the most oxidation resistant nickel alloys available. Outstanding oxidation resistance is achieved through a high chromium content (25%) supplemented with aluminum (2.2%) and a microalloying addition of yttrium (0.1%). High chromium contents are known to be beneficial for resisting oxidation. The aluminum addition allows for the formation of a continuous homogenous self repairing AI2O3 subscale. The addition of yttrium improves the adhesion and spalling resistance of the chromium and aluminum oxide scales. The extremely low scaling rate of alloy 602CA makes it an excellent candidate for applications such as calciners, where minimal contamination from scaling is permissible.
Extended exposure to methane (CH4), carbon monoxide (CO), and other carbon rich gases can lead to carburization. As heat resistant alloys absorb carbon, their ductility will gradually decrease. Alloys that are high in nickel, such as alloy 602CA possess excellent resistance to carburization attack8. Alloy 602CA forms a tenacious oxide scale, which provides increased protection from carburization. This protective scale impedes the carbon from being absorbed into the base metal.
Inconel 602CA is a high-temperature nickel-chromium alloy that belongs to the family of Inconel alloys. It is also known as Alloy 602CA or Inconel 602. This alloy is specifically designed for applications that require exceptional high-temperature strength, oxidation resistance, and resistance to carburization and sulfidation.
The composition of Inconel 602CA consists of nickel (approximately 60%), chromium (around 25%), iron (approximately 8%), and various other elements such as manganese, silicon, carbon, and sulfur in smaller amounts. The addition of rare earth elements like cerium and zirconium provides enhanced high-temperature stability and resistance to oxidation and corrosion.
Here are some key properties and characteristics of Inconel 602CA:
- High-temperature strength: Inconel 602CA exhibits excellent strength and mechanical properties at elevated temperatures, making it suitable for applications in extreme heat environments.
- Oxidation resistance: The high chromium content in Inconel 602CA provides exceptional resistance to oxidation, enabling it to withstand high-temperature oxidizing atmospheres.
- Carburization and sulfidation resistance: This alloy demonstrates good resistance to carburization and sulfidation, which are processes involving the diffusion of carbon and sulfur into the material at high temperatures. This resistance is beneficial for applications in petrochemical, chemical, and power generation industries.
- Creep resistance: Inconel 602CA has good resistance to creep deformation, which is important for applications subjected to prolonged exposure to high temperatures and constant stress.
- Weldability: Inconel 602CA can be readily welded using common welding techniques, allowing for the fabrication and repair of components.
Inconel 602CA is used in various high-temperature applications such as radiant tubes, furnace muffles, heat treatment equipment, catalytic crackers, and components in petrochemical and chemical processing industries. Its combination of high-temperature strength, oxidation resistance, and resistance to carburization and sulfidation makes it suitable for environments with demanding thermal and chemical conditions.
Characteristic:
- Excellent high temperature creep properties
- Excellent fatigue resistance in the HCF and LCF mode
- Extraordinary oxidation resistance at high temperatures and under cyclic conditions.
Inconel 602CA Chemical Composition
| % | Ni | Cr | Cu | C | Mn | Si | Y | Fe | Ti | Al | Zr |
|---|---|---|---|---|---|---|---|---|---|---|---|
| Min | Balance | 24 | 0 | 0.15 | 0 | 0 | 0.05 | 8 | 0.1 | 1.8 | 0.01 |
| Max | Balance | 26 | 0.1 | 0.25 | 0.15 | 0.5 | 0.12 | 11 | 0.2 | 2.4 | 0.1 |
Inconel 602CA Physical Properties
| Density g/cm3 | Melting range ��C | Specific heat capacity J/kg .�� | Thermal conductivity W/m | Electrical resistivity ��?.m |
|---|---|---|---|---|
| 7.9 | 1340-1400 | 450 | 11.3 | 1.15 |
Inconel 602CA Mechanical Properties (Minimum value at 20℃)
| Mechanical & Physical Properties | Ultimate Tensile Strength /MPa | 0.2% Yield Strength /MPa | Elongation % | Minimum Creep 0.0001% per hr | 10,000 hr Rupture Strength | Coefficient of Thermal Expansion /µm/m°C ** | Thermal Conductivity /kcal/(hr.m.°C) | Modulus of Elasticity / GPa |
|---|---|---|---|---|---|---|---|---|
| 21.1°C | 675 | 270 | 38 | - | - | - | 8.94 | 215 |
| 93.3°C | 650 | 240 | 30 | - | - | 14.15 | 10.58 | 209 |
| 204.4°C | 625 | 220 | 30 | - | - | 14.27 | 12.04 | 201 |
| 315.6°C | 600 | 200 | 30 | - | - | 14.42 | 13.33 | 197 |
| 371.1°C | 580 | 190 | 30 | - | - | 14.63 | 14.53 | 192 |
| 537.8°C | 560 | 180 | 43 | - | - | 14.9 | 17.26 | 189 |
| 684.9°C | 520 | 175 | 30 | 185 | - | 15.3 | 18.3 | 185 |
| 700°C | 420 | 170 | 30 | 132 | 155 | - | 20.53 | - |
| 815°C | 284 | 239 | 78 | 32 | 42 | 16 | - | 154 |
| 870°C | 226 | 197 | 82 | 16.5 | 22.1 | 16.71 | 22.02 | 137 |
| 982°C | 118 | 105 | 78 | 6.6 | 10.3 | 17.31 | 23.51 | 118 |
| 1093°C | 90 | 80 | 85 | 2.2 | 4.6 | 17.91 | 15.15 | 102 |
| 1204°C | 40 | 34 | 96 | - | 3 | - | - | - |
- Bars & Rods & Foring Ring /Flanges
- Sheet & Plate
- Strip & Coil
- Welding Wire &Spring wire
- Seamless Tube & Welded Pipe
»Round Bar & Square Bar & Hexagon Bar
● Diameter : φ8～φ300mm Length:10mm-6000mm
● Hot forging, Hot Rolling, Cold Drawing
● Bright Surface, Polished Surface, Black Surface
»Tube & Pipe:Seamless Tube& Welded Pipe
● Cold Drawing Seamless Pipe： φ1.0～φ220mm
● Hot Extrusion pipe: φ50～φ250mm
● Others : U Blend Tube and Elbow
»Hot Rolled Plate & Cold Rolled Sheet
● Cold Rolling Sheet Thickness: ≦2.0mm Width:≦1500m
● Hot rolling Plate Thickness: ≧4.0mm Width: ≦2500m
»Strip & Tape Ribbon
● Thickness: ≧ 0.01mm Width: 15mm-300mm
● Cold rolling BA Strip, Hard & Soft Condition
»Straight Length Wire & Spool Wire
● Welding Wire: φ 0.1mm～6.0mm Cut length Rod: φ1.0～φ8.0mm
● Package : 5-25kg/Spool or Box
Inconel 602CA ApplicationsI
- Rotary kiln and shaft
- Furnace rollers / Oven Parts
- nozzles
- pipe supports
- Components in the exhaust gas purifying catalyst of automobiles
- Reformers in the chemical and petrochemical industry
- Hydrogen production
- Heater plugs
Composition and Microstructure
Understanding the foundation of Inconel 602CA begins with its composition and microstructure. This alloy primarily consists of nickel (Ni), chromium (Cr), and iron (Fe), with additions of various elements like aluminum (Al) and cerium (Ce). The careful balance of these elements gives Inconel 602CA its distinctive combination of properties.
The microstructure of Inconel 602CA is characterized by a dense network of intermetallic phases, including carbides and nitrides. This microstructure, carefully engineered through controlled heat treatments, contributes significantly to the alloy’s high-temperature strength and corrosion resistance.
Mechanical Properties
Inconel 602CA boasts a set of mechanical properties that make it a standout material for extreme environments:
Tensile Strength
At both room temperature and high-temperature ranges, Inconel 602CA exhibits impressive tensile strength. This quality is particularly vital in applications where materials must withstand mechanical stress while operating in conditions exceeding 1000°C (1832°F).
Creep Resistance
In high-temperature environments, materials can experience creep deformation over time. Inconel 602CA excels in creep resistance, ensuring the long-term structural integrity of components subjected to sustained stress, such as those in power generation and petrochemical industries.
Oxidation Resistance
Oxidation can degrade materials operating at elevated temperatures. Inconel 602CA’s excellent oxidation resistance is crucial in applications exposed to high-temperature gases and combustion environments, including industrial furnaces and gas turbines.
Applications
Inconel 602CA’s versatility has earned it a prominent role in various industries where high-temperature and corrosion resistance are paramount:
Heat Treatment
Industrial furnaces and heat-treatment facilities rely on Inconel 602CA for the construction of radiant tubes, muffles, and fixtures. Its ability to withstand extreme heat and corrosive gases ensures the efficient operation of these crucial components.
Chemical Processing
Inconel 602CA is deployed in chemical processing plants for critical equipment like reactors, heat exchangers, and piping systems. Its resistance to corrosion from aggressive chemicals and high temperatures safeguards both the equipment and the processes.
Power Generation
In the power generation sector, particularly in the field of gas turbines, Inconel 602CA is a preferred material for components like combustion chambers, turbine blades, and heat exchangers. Its combination of strength and resistance to oxidation contributes to efficient energy production.
Aerospace
Aerospace applications also benefit from Inconel 602CA, where it is utilized in exhaust systems, afterburners, and combustion liners. Its ability to maintain structural integrity at high temperatures enhances the safety and performance of aircraft engines.
Future Prospects
As technology and industry continue to evolve, so too does the potential of Inconel 602CA:
Advanced Alloys
Research is ongoing to develop even more advanced versions of nickel-based superalloys, aiming to push the boundaries of high-temperature and corrosion resistance. These alloys may offer improved properties while maintaining or reducing production costs.
Additive Manufacturing
Incorporating Inconel 602CA into additive manufacturing processes has the potential to revolutionize the production of high-temperature components, allowing for complex geometries and rapid prototyping in industries such as aerospace and energy.
Sustainability
As sustainability becomes increasingly important, efforts are underway to make the production and recycling of Inconel 602CA more environmentally friendly, addressing concerns about resource consumption and emissions.