0Cr27Al7Mo2 Resistance Alloy Fe-Cr-Al-Mo Alloy For Heat Aggressive Environments
0Cr27Al7Mo2 Resistance Wire – Advanced Fe-Cr-Al-Mo Alloy for Extreme Heat & Aggressive Environments
Description
0Cr27Al7Mo2 resistance wire is a premium iron-chromium-aluminum-molybdenum (Fe-Cr-Al-Mo) alloy engineered for ultra-high temperature applications requiring exceptional oxidation resistance, mechanical stability, and longevity in corrosive atmospheres. With a composition of 26–28% chromium, 6.5–7.5% aluminum, 1.5–2.5% molybdenum, and balanced iron, this alloy forms a robust alumina (Al₂O₃) layer at temperatures up to 1,500°C (2,732°F), delivering unparalleled protection against oxidation, carburization, and sulfidation in sulfur-rich, chlorine-laden, or reducing environments. The addition of molybdenum enhances creep resistance and minimizes intergranular corrosion, making it ideal for industrial furnaces, petrochemical reactors, and aerospace systems.
Certified to GB/T 1234 and DIN 17470 standards, 0Cr27Al7Mo2 wire achieves a tensile strength of 650–800 MPa and a surface load capacity of 2.5 W/cm², outperforming conventional Fe-Cr-Al alloys in extreme thermal cycles. Its high electrical resistivity (1.50 μΩ·m) and low thermal expansion coefficient (14.0×10⁻⁶/°C) ensure energy efficiency and dimensional stability, reducing operational costs in high-stress applications such as glass manufacturing, hydrogen production, and advanced nuclear reactors.
Technical Specifications (Table)
| Property | Value | Standard |
|---|---|---|
| Chemical Composition | Cr: 26–28%, Al: 6.5–7.5%, Mo: 1.5–2.5% | GB/T 1234, DIN 17470 |
| Fe: Balance, C: ≤0.08%, Si: ≤1.0% | ASTM B603 (similar) | |
| Mechanical Properties | Tensile Strength: 650–800 MPa | ASTM E8 |
| Elongation: ≥12% | ||
| Physical Parameters | Density: 7.1 g/cm³ | ISO 6892 |
| Melting Point: 1,520°C | ||
| Electrical Resistivity: 1.50 μΩ·m |
Applications
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Industrial Furnaces: Heating elements for glass melting tanks, ceramic sintering, and steel annealing.
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Petrochemical: Ethylene cracker tubes, sulfur recovery units (SRUs), and hydrogen reformers.
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Aerospace: Combustion chamber liners, turbine exhaust components, and rocket engine igniters.
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Energy Production: Hydrogen electrolyzers, nuclear reactor heat exchangers, and syngas reactors.
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Chemical Processing: Reactors handling molten salts, chlorinated hydrocarbons, and sulfuric acid.
Q&A
Q1: How does molybdenum enhance 0Cr27Al7Mo2’s performance compared to standard Fe-Cr-Al alloys?
A: Molybdenum improves high-temperature creep resistance, reduces sulfur-induced embrittlement, and enhances corrosion resistance in chloride-rich environments.
Q2: What is the maximum continuous operating temperature in reducing atmospheres?
A: 1,400°C in reducing or vacuum environments, with optimal performance in hydrogen or inert gases.
Q3: Is pre-oxidation required for new heating elements?
A: Yes. Heat treatment at 1,000–1,100°C for 1–2 hours accelerates alumina layer formation, extending service life by up to 50%.
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