The presence of Incoloy 805 makes harsh, high-temperature environments less of a threat. In this scenario, standard stainless steel is often not enough. Let us know why Alloy 805 is the best choice. It makes sense to use it for critical components such as speciality stainless steel pipe and fittings.
What is Incoloy 805? A Strategic Material Choice!
Incoloy 805 (UNS N08805) is a high performance nickel-iron-chromium alloy. Designed for severe applications. It has excellent resistance to carburisation. In addition, it is resistant to oxidation and vulcanisation. These aggressive conditions usually occur at very high temperatures. A key feature is its excellent creep strength. It maintains a stable metallurgical structure. This ensures long-term integrity. Performance is superior to many conventional stainless steels.
Core Advantages of Incoloy 805
Incoloy 805 offers compelling advantages to discerning buyers and engineers. Its robustness directly increases system reliability and reduces maintenance.
It excels in high temperature, carbon-rich atmospheres. Forms a stable oxide layer that prevents carbon from diffusing into the material. This is vital for furnace tubes and converter pipes.
This alloy is resistant to oxidation even at extreme temperatures. Its stable chromium oxide film provides protection. This ensures its longevity in air or oxygen-rich environments. It is important for high-temperature exhaust systems.
Alloy 805 maintains its strength under prolonged stress. It resists deformation at elevated temperatures. This provides structural integrity for critical components. Think of pressure-bearing pipes and fittings.
Sulfur-containing environments can severely degrade the performance of metals, and Incoloy 805 provides strong protection. It can withstand these harsh environments and extend the life of sulfur-processed piping.
Unlike some high-temperature alloys, Incoloy 805 does not form brittle phases. It maintains ductility and strength, ensuring long-term operational integrity. It reduces the risk of sudden failure.
Chemical Composition of Incoloy 805
| Element | Ni | Cr | Fe | C | Mn | Si | Al | Ti | Nb | S |
|---|---|---|---|---|---|---|---|---|---|---|
| Content (%) | 30.0-33.0 | 26.0-29.0 | Balance | ≤0.05 | ≤1.00 | ≤1.00 | ≤0.10 | ≤0.10 | 0.80-1.20 | ≤0.015 |
What We Do
Mechanical Properties of Incoloy 805
| Tensile Strength | Yield Strength (0.2% Offset) | Elongation (in 50mm) | Hardness (HB) | Density | Melting Range |
|---|---|---|---|---|---|
| ≥600MPa ( ≥87ksi ) | ≥≥240MPa ( ≥35ksi ) | ≥30 | ≤200 | 7.99g/cm³ | 1370−1410°C |
Stainless Steel Pipe & Fitting Systems
While stainless steel is common, Incoloy 805 offers superior performance. It excels where stainless steel would fail. It is crucial for extending service life in extreme process conditions.
Incoloy 805 is the backbone of reformer tubes in hydrogen or ammonia production. It can withstand extreme temperatures and corrosive gases to ensure efficient and safe operation.
These coils are designed to withstand the rigours of the carburising environment. 805 Alloy has excellent corrosion resistance, preventing coke formation and prolonging run time. Increased efficiency.
High temperatures and aggressive waste gases are common. Alloy 805 pipe and fittings are oxidation and vulcanisation resistant. Ensures reliable waste disposal.
Incoloy 805 tubing is important for critical heat exchange in hot, corrosive water streams. It maintains integrity where other alloys would degrade.
Common Product Forms and Applicable Standards
| Product Form | Relevant ASTM/ASME Standards |
|---|---|
| Seamless Pipe & Tube | ASTM B535 (covers pipe and tube), ASME SB535 |
| Welded Pipe & Tube | ASTM B546 (covers pipe and tube), ASME SB546 |
| Pipe Fittings | ASTM B366 (General fittings standard; specific grades apply) |
| Plate, Sheet & Strip | ASTM B463, ASME SB463 |
| Bar & Rod | ASTM B473, ASME SB473 |
| Forgings | ASTM B564 |
Welding Best Practices for Incoloy 805 Systems
Proper welding techniques are critical to Incoloy 805 welded stainless steel pipe as well as fittings. They ensure the integrity and performance of the final assembly.
- Filler Metal Selection: Use an appropriate matching filler metal. AWS A5.14 ERNiCrCoMo-1 (similar to Inconel 617 or 617-like fillers) is often recommended. This ensures strong and corrosion-resistant welds.
- Surface Preparation: Thoroughly clean all weld surfaces. Remove all scale, oil, or grease. This prevents contamination and weld defects.
- Low Heat Input: Maintain low heat input during welding. Avoid excessive interpass temperatures. This minimizes distortion and preserves material properties.
- Shielding Gas: Use an inert shielding gas like argon. This protects the weld pool from atmospheric contamination. This ensures clean, defect-free welds.
- No Post-Weld Heat Treatment: Generally, post-weld heat treatment is not required. Incoloy 805 resists sensitization. This simplifies fabrication processes.
Incoloy 805 vs. Incoloy 800: Key Differences
| Feature | Incoloy 805 | Incoloy 800 |
|---|---|---|
| Primary Strength | Carburization, Sulfidation | Oxidation, Aqueous Corrosion |
| Chromium Content | Higher (26-29%) | Lower (19-23%) |
| Key Added Element | Niobium | Titanium/Aluminum (minor) |
Contact Us
- RM901 No.22 Tangjiaqiao Road Wenzhou China
- +86 577 8551 1171
- [email protected]
- https://www.kaysuns.com/
EN 
RU 
ES 
PT 
FR 
