How to Choose Alloy 601 and Alloy 602CA: A Professional Buyer's Guide
Gnee Steel
How to Choose Alloy 601 and Alloy 602CA: A Professional Buyer's Guide
In environments exceeding 1000°C, the choice between nickel alloys 601 and 602CA not only determines performance but also impacts the overall return on investment for the project. 601 is the industry's leading material, while 602CA boasts unparalleled creep resistance. As a leading manufacturer of high-nickel alloys, GNEE Steel offers both grades in plate, bar, and tube forms, ensuring full compliance with ASTM/ASME standards.
Properties of Gnee 601 and 602CA alloys
1. Alloy 601 (UNS N06601 / 2.4851) – A Leading Material with Excellent Oxidation Resistance
Choose Alloy 601 for reliable performance up to 1200°C.
Key Advantages:
Oxidation Limit: Excellent oxidation resistance up to 1200°C (2200°F).
Ductility: Excellent machinability and weldability with standard processes.
Value for Money: Offers optimal value for furnaces and heat treatment baskets.
2. 602CA Alloy (UNS N06025 / 2.4633) - Ultimate Creep Strength Solution
Key Advantages:
Ultimate Strength: 150% higher creep rupture strength than 601 alloy at temperatures above 1000°C.
Resistance to Metal Powdering: Best resistance to carburizing and "metal powdering" among all nickel alloys.
Maximum Temperature: Maintains structural integrity at temperatures up to 1232°C (2250°F).
Applications: Radiant tubes, ammonia converters, and rotary kilns.
Available Forms: Plate (ASTM B168 compliant), Bar (ASTM B166 compliant), Seamless Tube.
Technical Comparison Table: Alloy 601 vs. Alloy 602CA
| Property | Alloy 601 (UNS N06601) | Alloy 602CA (UNS N06025) |
| Standard Specs | ASTM B168, B166, B167 | ASTM B168, B166, DIN 17750 |
| Chemistry Highlights | Ni 60%, Cr 23%, Al 1.4% | Ni 63%, Cr 25%, Al 2.2%, Y+Zr |
| Max Service Temp | 1200°C (2192°F) | 1232°C (2250°F) |
| Oxidation Layer | Cr₂O₃ + Al₂O₃ | Dense, Self-healing Al₂O₃ |
| Creep Strength | Good | Outstanding (Premium Level) |
| Carburization Res. | Moderate | Exceptional |
Summary of the main differences between Inconel 601 and Inconel 602CA:
Oxidation performance: 602CA offers better protection against severe internal oxidation and sulfidation; 601 performs excellently in general thermal oxidation.
Strength: Under certain conditions, 601 may have slightly higher tensile strength/yield strength, but 602CA has superior creep resistance (strength under long-term stress at high temperatures).
Cost and performance: 601 is an excellent and cost-effective option; 602CA provides superior performance for more demanding and critical applications.
📦 Professional Packaging and Fast Delivery
We understand that the integrity of the material is just as important as the alloy itself.
Packaging: Waterproof plastic film + fumigated wooden crate (IPPC compliant) + steel strap reinforcement.
Delivery: Strategic partnerships with global logistics providers ensure delivery within 7-15 days.
Labels: Each product is laser-marked with the furnace number, grade, and size, achieving 100% traceability.
Gnee Steel inconel 601 product packing
About Gnee Steel
GNEE Steel is a leading global supplier of high-performance alloys with over 18 years of expertise in the nickel industry. We not only sell metals but also provide data-driven material solutions.
Global Recognition: Our products are exported to over 160 countries and are certified by ISO 9001, SGS, and BV.
Inventory Strength: We have over 35,000 square meters of warehouse space with readily available UNS N06601 nickel alloy for immediate shipment.
Processing Capabilities: We offer precision laser cutting, waterjet cutting, and CNC machining according to your custom drawings.
Quality Assurance: Every shipment comes with a factory test certificate (MTC) 3.1 conforming to EN 10204 standards.
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FAQ
Q: Can GNEE provide samples of 601 alloy for testing?
A: Yes, we can provide material samples for chemical composition analysis and oxidation testing upon request.
Q: Do you offer 602CA alloy in foil or sheet?
A: We have various specifications from 0.1mm foil to 100mm sheet to meet different industrial needs.
Q: Are your materials compatible with Inconel 601 specifications?
A: Our 601 alloy is fully equivalent to Inconel 601, meeting the chemical and mechanical property requirements of UNS N06601, and is an ideal direct replacement.
Q: What is 602CA alloy?
A: 602CA/2.4633 alloy is a high-carbon nickel-chromium-iron alloy with added aluminum and yttrium.
Q: What is 601 alloy?
A: Gnee Steel 601 is a nickel-chromium-iron alloy with added aluminum and titanium. Due to its controllable carbon content and coarse grains, it has superior creep rupture performance and is therefore particularly recommended for applications above 550 °C (1022 °F).
