DIN EN10216-5 1.4404 D2T1 Seamless Tube for Heat Exchangers in Fossil Fuel Plant
Brand Name:Yuhong
Certification:ABS, BV, DNV, CCS, LR
Model Number:DIN EN10216-5 1.4404 D2T1 Seamless Tube
Minimum Order Quantity:200~500 KGS
Delivery Time:35-60 Days (Depend on Customer's Requirements)
Payment Terms:TT, LC
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DIN EN10216-5 1.4404 D2T1 Seamless Tube for Heat Exchangers in Fossil Fuel Plant
DIN EN10216-5 D2T1 1.4404 seamless tube is a high-quality, corrosion-resistant steel tube designed to handle pressure and high temperatures. It is a high-integrity, low-carbon austenitic stainless steel tube. It is seamless for strength, solution annealed for optimal corrosion resistance and formability, and eddy current tested to ensure it is free from defects.
Here are some detailed breakdowns:
Material: DIN EN10216-5 1.4404
1. Chemical Composition (in weight %)
The composition is specified by the EN 10216-5 standard for grade 1.4404. The values are typically maximum percentages unless indicated as a range.
| Element | Minimum (%) | Maximum (%) | Notes |
| Carbon (C) | - | 0.030 | The "L" (low-carbon) grade is crucial for weldability. |
| Silicon (Si) | - | 1.00 | |
| Manganese (Mn) | - | 2.00 | |
| Phosphorus (P) | - | 0.045 | |
| Sulfur (S) | - | 0.015 | |
| Chromium (Cr) | 16.00 | 18.00 | Provides the primary corrosion resistance. |
| Molybdenum (Mo) | 2.00 | 2.50 | Key for resistance to pitting and crevice corrosion. |
| Nickel (Ni) | 10.00 | 13.00 | Stabilizes the austenitic structure. |
| Nitrogen (N) | - | 0.11 |
Iron (Fe) makes up the balance.
2. Mechanical Properties (for tubes in the D2 condition - Solution Annealed)
The mechanical properties are specified for the finished product at room temperature.
| Property | Value | Unit | Notes / Test Condition |
| Proof Strength (Rp0.2) | ≥ 180 | MPa (N/mm²) | This is the stress at which a small amount of permanent deformation (0.2%) occurs. Also known as Yield Strength. |
| Tensile Strength (Rm) | 450 - 650 | MPa (N/mm²) | The maximum stress the material can withstand while being stretched. |
| Elongation (A) | ≥ 40 | % | Measured on a gauge length of 5.65√S₀ (proportional specimen). This indicates ductility. |
| Hardness | ≤ 215 | HBW (Brinell) | Maximum hardness value. |
Important Notes:
- Delivery Condition (D2T1): These mechanical properties are guaranteed for tubes delivered in the D2 (Solution Annealed) condition, which is the softest and most corrosion-resistant state.
- Testing: The properties are verified by the manufacturer through destructive testing on samples from finished tubes, as required by the EN 10216-5 standard.
- High-Temperature Properties: For design purposes involving elevated temperatures (e.g., for power plant boilers), the standard provides additional properties like creep strength and elevated temperature yield strength, which are different from the room-temperature values listed above.
3. Key Properties of DIN EN10216-5 1.4404:
- Excellent Corrosion Resistance: Good general resistance, with enhanced resistance to chlorides and acids due to the addition of Molybdenum (Mo).
- High-Temperature Strength: Maintains good mechanical strength and oxidation resistance at elevated temperatures (typically up to around 400-450°C continuously, and higher for short periods).
- Good Formability and Weldability.
Summary of Applications and Why This Tube is Chosen
| Application Sector | Specific Examples | Why DIN EN10216-5 D2T1 1.4404 is Used |
| Power Generation | Superheater tubes, reheater tubes, boiler tubes, heat exchanger tubes. | Withstands high pressure and temperatures of steam; resistant to oxidation and scaling; the seamless nature ensures integrity under extreme cyclic stresses. |
| Petrochemical & Chemical | Process piping, reactor tubes, heat exchanger tubes, transfer lines for corrosive chemicals. | Excellent resistance to a wide range of acids, alkalis, and chlorides; the "L" grade (1.4404) is essential for welded structures to prevent corrosion in the heat-affected zone. |
| Oil & Gas | Downhole tubing, instrumentation lines, umbilicals, components in sour gas environments (with limitations). | Resists corrosion from saline environments and certain acidic conditions (H2S, CO2). The stringent NDT (T1) ensures reliability in critical and remote applications. |
| Automotive (High-Performance) | Turbocharger housings, intercooler pipes, high-performance exhaust systems. | Resists high-temperature exhaust gases and corrosion from condensation; offers a good strength-to-weight ratio. |
| Food & Pharmaceutical | Process lines for sensitive products, sanitary tubing. | Excellent corrosion resistance ensures product purity; smooth seamless interior is easy to clean and sterilize (often with an additional polished finish). |
| Marine & Offshore | Heat exchangers for seawater cooling, piping systems on ships and platforms. | The Molybdenum content provides superior resistance to pitting and crevice corrosion in chloride-rich seawater environments. |
DIN EN10216-5 1.4404 D2T1 Seamless Tube for Heat Exchangers in Fossil Fuel Plant
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