Nickel Alloys Alloy 825 Flanges Overview
Zeon Exports supplies Nickel Alloy 825 (Incoloy, UNS N08825) flanges, a nickel-iron-chromium alloy with molybdenum, copper and titanium additions for outstanding resistance to sulfuric and phosphoric acids and chloride stress corrosion cracking.
Nickel Alloy 825 (Incoloy) Flanges connect and seal sulfuric acid, phosphoric acid and chloride-bearing process piping in chemical processing and oil & gas systems. Its nickel-iron-chromium base with molybdenum and copper additions gives outstanding resistance to acids, pitting, crevice corrosion and chloride stress corrosion cracking across a wide range of process conditions.
- High nickel content resists chloride-ion stress corrosion cracking
- Tensile ≥586 MPa, yield ≥241 MPa in the annealed condition
- EN 10204 3.1 certified, export-ready worldwide
Quick Specifications of Nickel Alloys Alloy 825 Flanges
Nickel Alloy 825 (Incoloy) Flanges are produced to internationally recognized specifications.
| Field | Detail |
|---|---|
| Material/Grade | Nickel Alloy 825 (Incoloy) |
| UNS | N08825 |
| DIN/Werkstoff Number | 2.4858 |
| Standards | ASTM B564 |
| Form | Weld Neck, Slip-On, Blind, Socket Weld |
| Finish | As specified (confirm on order) |
| Heat Treatment | Annealed |
| Certification | EN 10204 3.1 |
Equivalent Grades of Alloy 825
Alloy 825 (Incoloy 825) is recognized under several international designations below.
| UNS | DIN/Werkstoff Number | Common Trade Name | ASTM/ASME Standard |
|---|---|---|---|
| N08825 | 2.4858 | Incoloy 825 | ASTM B564 |
Chemical Composition of Alloy 825
Composition per ASTM B564 for UNS N08825; exact limits can vary slightly by specification and heat.
| Element | Composition (%) |
|---|---|
| Nickel (Ni) | 38.0 – 46.0 |
| Iron (Fe), min | 22.0 |
| Chromium (Cr) | 19.5 – 23.5 |
| Molybdenum (Mo) | 2.5 – 3.5 |
| Copper (Cu) | 1.5 – 3.0 |
| Titanium (Ti) | 0.6 – 1.2 |
| Carbon (C), max | 0.05 |
| Manganese (Mn), max | 1.00 |
| Sulphur (S), max | 0.03 |
| Silicon (Si), max | 0.50 |
| Aluminum (Al), max | 0.20 |
Physical Properties of Nickel Alloy 825 (Incoloy)
Physical properties for Incoloy 825, confirmed against manufacturer data.
| Property | Value |
|---|---|
| Density | ~8.14 g/cm3 (typical) |
| Melting Range | ~1370 – 1400°C (typical) |
| Magnetic Behaviour | Essentially non-magnetic |
Mechanical Properties of Nickel Alloys Alloy 825 Flanges
Minimum mechanical properties for annealed UNS N08825 per ASTM B564.
| Property | Minimum Value |
|---|---|
| Tensile Strength | 586 MPa (85 ksi) |
| Yield Strength (0.2% offset) | 241 MPa (35 ksi) |
| Elongation | 30% |
| Condition | Annealed |
Corrosion Resistance of Nickel Alloy 825 (Incoloy)
- Nickel Alloy 825 Flanges resist both oxidizing and reducing media, a versatile profile among nickel alloys.
- Acid resistance: molybdenum and copper give outstanding resistance to sulfuric and phosphoric acids.
- Chloride SCC resistance: high nickel content resists chloride-ion stress corrosion cracking that limits stainless steels.
- Pitting and crevice resistance: molybdenum contributes strong resistance to localized attack in chloride media.
Heat Resistance of Nickel Alloy 825 (Incoloy)
Nickel Alloy 825 flanges have good mechanical properties from cryogenic temperatures to moderately high temperatures, but are not normally used above roughly 540°C (1,000°F), where microstructural changes can significantly lower ductility and impact strength. Confirm exact service limits against the governing standard and application before specifying.
Key Properties of Nickel Alloys Alloy 825 Flanges
Beyond corrosion and heat performance, Incoloy 825 flanges offer these additional properties.
- Good impact strength maintained at cryogenic temperatures
- Good weldability using ERNiFeCr-1 matching filler metal
- Similar to Alloy 800 with improved aqueous corrosion resistance
- Machinable with standard tooling, allowing for work hardening
Benefits of Nickel Alloys Alloy 825 Flanges
Choosing Incoloy 825 flanges from Zeon Exports delivers measurable advantages for your project.
- Broad chemical compatibility across acidic and chloride media
- Full MTC 3.1 documentation for project QA/QC requirements
- Multiple flange types and pressure classes to match project specs
- Reliable bulk supply with consistent ready stock
- Competitive export pricing for large industrial orders
- Fast dispatch to global project sites and ports
Related Products
Explore related Nickel Alloy products from Zeon Exports.
Request a Quote for Nickel Alloys Alloy 825 Flanges
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Call: +91 98205 33105
Email: info@zeonexports.com
Website: www.zeonexports.com
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Frequently Asked Questions About Nickel Alloys Alloy 825 Flanges
Common questions about Nickel Alloy 825 (Incoloy) Flanges, answered below.
Q1: What is Nickel Alloy 825 (Incoloy)?
Ans. Incoloy 825 (UNS N08825) is a nickel-iron-chromium alloy with molybdenum, copper and titanium additions for acid resistance.
Q2: What flange types are available in Incoloy 825?
Ans. We supply Weld Neck, Slip-On, Blind and other flange types manufactured to ASTM B564.
Q3: What standards do Incoloy 825 flanges meet?
Ans. Flanges are manufactured to ASTM B564, certified to EN 10204 3.1 mill test certificates.
Q4: What is the maximum service temperature?
Ans. Incoloy 825 is not normally used above roughly 540°C (1,000°F); confirm exact limits against your design code.
Q5: Is Incoloy 825 magnetic?
Ans. Incoloy 825 is essentially non-magnetic, being an austenitic nickel-iron-chromium alloy.
Q6: Is Incoloy 825 suitable for sulfuric acid service?
Ans. Yes, Incoloy 825 is especially resistant to sulfuric and phosphoric acids across a range of concentrations.
Q7: What certification is provided with orders?
Ans. Every order ships with EN 10204 3.1 mill test certificates confirming grade, heat and dimensions.
Q8: Does Zeon Exports supply custom flange sizes?
Ans. Yes, flanges are available in custom sizes and pressure classes on request for bulk industrial orders.
