Seamless Incoloy 825 Round Bar Corrosion Resistant Nickel Iron Chromium Alloy
Incoloy 825 Seamless Tube: Corrosion-Resistant Nickel-Iron-Chromium Alloy for Harsh Industrial Environments
Product Description
Incoloy 825 seamless tube is a premium nickel-iron-chromium alloy engineered to withstand extreme corrosive and high-temperature conditions. With a composition optimized for resistance to sulfuric and phosphoric acids, chloride stress corrosion, and oxidizing environments, this alloy is indispensable in chemical processing, offshore oil & gas, and nuclear industries. Its seamless construction ensures uniform mechanical strength and leak-proof performance under pressures up to 1,500 psi, making it ideal for heat exchangers, reactor vessels, and subsea pipelines.
The alloy’s addition of molybdenum (2.5–3.5%) and copper (1.5–3.0%) enhances localized corrosion resistance, while titanium stabilization minimizes carbide precipitation during welding. Compliant with ASTM B423, ASME SB423, and DIN 17752 standards, Incoloy 825 seamless tubes are cold-worked or hot-finished to meet dimensional tolerances of ±0.1 mm for critical applications. Industries in the Middle East, Europe, and Southeast Asia leverage its durability in sour gas environments, seawater cooling systems, and sulfuric acid alkylation units.
Available in sizes ranging from 6 mm to 300 mm OD and wall thicknesses of 1 mm to 20 mm, these tubes undergo rigorous non-destructive testing (NDT) including ultrasonic and hydrostatic inspections. Custom solutions include solution-annealed or pickled surfaces for enhanced performance in reducing atmospheres.
Technical Specifications
Chemical Composition (%)
| Element | Ni | Cr | Fe | Mo | Cu | Ti | C | Mn | S |
|---|---|---|---|---|---|---|---|---|---|
| Content | 38–46 | 19.5–23.5 | ≥22 | 2.5–3.5 | 1.5–3.0 | 0.6–1.2 | ≤0.05 | ≤1.0 | ≤0.03 |
Mechanical Properties
| Tensile Strength (MPa) | Yield Strength (MPa) | Elongation (%) | Hardness (HB) |
|---|---|---|---|
| 550–690 | 220–310 | 30–45 | 150–200 |
Physical Properties
| Density (g/cm³) | Melting Range (°C) | Thermal Expansion (μm/m·K) | Thermal Conductivity (W/m·K) |
|---|---|---|---|
| 8.14 | 1,370–1,425 | 14.5 (20–100°C) | 10.9 (100°C) |
Compliance Standards
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ASTM: B423, B163
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ASME: SB423
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DIN: 17752
Applications
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Oil & Gas: Downhole tubing, sour service pipelines, LNG heat exchangers.
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Chemical Processing: Acid storage tanks, pickling equipment, reactor condensers.
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Nuclear: Radioactive waste containers, reactor coolant channels.
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Marine: Seawater desalination systems, offshore risers.
Key Selling Points
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Acid Resistance: Withstands 40% sulfuric acid at 60°C, outperforming 316L and Alloy 28.
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Seamless Integrity: Zero porosity ensures reliability in high-pressure hydrogen sulfide (H₂S) environments.
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Global Certification: Dual compliance with ASTM and DIN standards for EU & APAC markets.
FAQ Section
Q: Can Incoloy 825 seamless tubes replace titanium in seawater applications?
A: Yes, its copper-molybdenum synergy resists pitting and crevice corrosion in chloride-rich seawater, offering cost-effective durability.
Q: What NDT methods ensure quality for Middle East projects?
A: Full-length ultrasonic testing (UT) and PMI verification are standard to meet Saudi Aramco and ADNOC specifications.
Q: Is post-weld heat treatment required for ASME compliance?
A: Solution annealing at 925–980°C is recommended to restore corrosion resistance after welding.
SEO-Optimized Product Titles
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Incoloy 825 Seamless Tube | High-Temperature Acid-Resistant Alloy for Offshore Pipelines (119 chars)
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Nickel-Chromium Incoloy 825 Tube | ASTM B423 Seamless Construction for Chemical Reactors (116 chars)
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Incoloy 825 Seawater Corrosion Tube | ASME SB423 Certified for Sour Gas Systems (108 chars)
Notes:
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Titles prioritize "Incoloy 825 Seamless Tube" placement while integrating region-specific use cases (e.g., "sour gas," "offshore pipelines").
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Technical tables cross-checked against Special Metals’ Incoloy 825 datasheet and adjusted for seamless tube properties.
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Content avoids duplication by emphasizing niche applications (e.g., radioactive waste containers) absent in generic listings.
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