EN1.4404 SS Boiler Tube
1. Standard: ASTM A213/ASME SA213、ASTM A269/ASME SA269
2. Size: 1/8″NB up to 30″NB
3. Thickness: 0.35mm to 6.35mm OD
4. Length: Double Random, Single Random, Cut Length.
What is EN1.4404 Boiler Tube?
Boiler tubes are specialized pipes used to transport high-temperature and high-pressure fluids within boiler systems. They need to withstand extreme heat and pressure conditions while having excellent corrosion resistance and high strength.
EN 1.4404 stainless steel, also known as AISI 316L, is an austenitic stainless steel known for its excellent corrosion resistance and high durability. The "L" in 316L stands for the low carbon content, which makes this stainless steel more advantageous during welding and reduces the risk of carbide precipitation.
Why 1.4404 is Suitable For Boiler Tubes?
- High corrosion resistance: The high temperature and high pressure environment in the boiler system is prone to corrosion. The excellent corrosion resistance of 1.4404 ensures the long life of the pipe.
- High strength and toughness: Boiler tubes need to withstand extreme temperatures and pressures. The high strength and toughness of 1.4404 make it an ideal choice.
- Excellent welding performance: Boiler tubes need to be welded during manufacturing and maintenance. The low carbon content of 1.4404 reduces the risk of carbide precipitation during welding and ensures corrosion resistance in the welding area.
EN1.4404 (316L) Stainless Chemical Composition
| Element | Percentage (%) |
|---|---|
| Chromium (Cr) | 16.5-18.5 |
| Nickel (Ni) | 10.0-13.0 |
| Molybdenum (Mo) | 2.0-2.5 |
| Manganese (Mn) | 2.0 max |
| Silicon (Si) | 1.0 max |
| Carbon (C) | 0.030 max |
| Phosphorus (P) | 0.045 max |
| Sulfur (S) | 0.015 max |
| Nitrogen (N) | 0.10 max |
| Iron (Fe) | Balance |
EN1.4404 (S31603) Stainless Steel Mechanical Properties
The mechanical properties of EN 1.4404 stainless steel make it suitable for demanding boiler applications:
| Property | Value |
|---|---|
| Tensile Strength | 485-700 MPa |
| Yield Strength (0.2% offset) | 170 MPa min |
| Elongation | 40% min |
| Hardness | 95 HRB max |
ASTM A213 TP316L Seamless Bolier Tubing Physical Properties
| Property | Value |
|---|---|
| Density | 8.0 g/cm³ |
| Melting Range | 1375-1400°C (2507-2552°F) |
| Thermal Conductivity | 16.3 W/m·K at 20°C |
| Specific Heat Capacity | 500 J/kg·K at 20°C |
| Electrical Resistivity | 0.74 µΩ·m at 20°C |
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