Studded Tube ASME SA335 P9 Alloy Steel For Heater Furnace
A studded finned tube is a high-performance heat exchanger component featuring welded studs that significantly enhance heat transfer efficiency between fluids and gases. The stud design maximizes surface area while maintaining a compact footprint, making it ideal for demanding industrial applications.
| Element | Composition Range |
|---|---|
| Carbon (C) | 0.15 max |
| Manganese (Mn) | 0.30 - 0.60 |
| Phosphorus (P) | 0.025 max |
| Sulfur (S) | 0.025 max |
| Silicon (Si) | 0.25 - 1.00 |
| Chromium (Cr) | 8.00 - 10.00 |
| Molybdenum (Mo) | 0.90 - 1.10 |
| Nickel (Ni) | 0.40 max (optional) |
| Vanadium (V) | 0.18 max (optional) |
| Iron (Fe) | Balance |
The 9% Cr-1% Mo composition provides exceptional high-temperature strength and oxidation resistance, while low carbon content ensures good weldability.
| Property | Value |
|---|---|
| Tensile Strength (min) | 415 MPa (60,000 psi) |
| Yield Strength (min) | 205 MPa (30,000 psi) |
| Elongation (min, % in 50mm) | 30% |
| Hardness (max, Brinell HBW) | 179 HBW |
| Impact Toughness (Charpy V-Notch, min at 21°C) | Typically required (varies by spec) |
Supplied in normalized & tempered condition for optimal strength and ductility. Retains strength up to ~650°C (1200°F) and requires preheating (~200-300°C) with post-weld heat treatment (PWHT) to prevent cracking.
- Increased Surface Area: Studs significantly enhance heat transfer surface for superior thermal efficiency
- Compact Design: Maximizes heat transfer capacity without increasing physical footprint
- High-Temperature Performance: Resilient in extreme conditions up to 650°C (1200°F)
- Reduced Fouling: Smooth stud surfaces minimize deposit buildup compared to traditional fins
- Enhanced Durability: Superior erosion/corrosion resistance in harsh industrial environments
- Power Generation: Heat Recovery Steam Generators (HRSGs), Fluidized Bed Boilers, Superheaters
- Petrochemical: Fired Heaters, Catalytic Cracking Units (FCCU), Coker Units
- Waste Treatment: Waste-to-Energy Plants, Air Preheaters (APH)
- Chemical Processing: Sulfuric Acid Plants, Ammonia Production, Syngas Coolers
- Heavy Industry: Cement Clinker Coolers, Blast Furnace Gas Ducts
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