Alloy 330，Incoloy 330 Tube，,E FORU

British Specs:，American Specs: AMS 5716 Sheet and Strip，German Specs:

### **Product Introduction: Alloy 330 / Incoloy 330 Tube (UNS N08330)** **Alloy 330 Tube** is a high-performance nickel-iron-chromium alloy tubular product engineered for the most demanding high-temperature environments. Distinguished by its exceptional resistance to oxidation, carburization, and thermal shock, this tube is a critical component in systems where reliability under extreme heat—up to 2200°F (1200°C)—is paramount. Available in both **seamless** and **welded** forms, Alloy 330 tube is designed for a wide range of applications, from carrying corrosive process gases to serving as radiant heating elements. Its balanced chemistry ensures long service life and reduced maintenance costs in aggressive thermal processing industries. --- ### **Chemical Composition (Weight %)** The composition is precisely controlled to form a stable, protective oxide layer that resists degradation under cyclic heating and cooling. | Element | Content (%) | Role in the Alloy | | :--- | :--- | :--- | | **Nickel (Ni)** | 34.0 - 37.0 | Provides fundamental resistance to oxidation and carburization; stabilizes the austenitic matrix. | | **Chromium (Cr)** | 17.0 - 20.0 | Forms a protective, self-healing chromium oxide scale (Cr₂O₃) for superior oxidation resistance. | | **Iron (Fe)** | Balance | The base element of the alloy. | | **Silicon (Si)** | 0.75 - 1.50 | A critical element that dramatically enhances resistance to carburization and oxidation, especially in cyclic service. | | **Manganese (Mn)** | ≤ 2.00 | Aids in hot workability and provides sulfur tolerance. | | **Carbon (C)** | ≤ 0.08 | Contributes to high-temperature strength. | | **Phosphorus (P)** | ≤ 0.030 | Impurity, controlled. | | **Sulfur (S)** | ≤ 0.030 | Impurity, kept low to prevent hot shortness. | --- ### **Physical & Mechanical Properties (Typical for Annealed Condition)** | Property | Value | | :--- | :--- | | **Density** | 8.0 g/cm³ (0.289 lb/in³) | | **Melting Point** | 1371 - 1427 °C (2500 - 2600 °F) | | **Thermal Expansion Coefficient** | 14.4 μm/m·°C (20-300°C) | | **Thermal Conductivity** | 12.5 W/m·K (at 100°C) | | **Modulus of Elasticity** | 196 GPa (28.4 x 10⁶ psi) at 21°C | | **Tensile Strength** | 620 MPa (90 ksi) min | | **Yield Strength (0.2% Offset)** | 310 MPa (45 ksi) min | | **Elongation** | 30% min | *Note: These are typical properties for the base material; the tube product will conform to the requirements of its governing standard (e.g., ASTM B535).* --- ### **International Standards** Alloy 330 tube is manufactured to several key international standards that define its quality, dimensions, and testing requirements. | Standard Body | Standard Number | Title (Scope) | | :--- | :--- | :--- | | **ASTM** | B535 | *Standard Specification for Nickel-Iron-Chromium-Silicon Alloys (UNS N08330 and N08332) Pipe and Tube* | | **ASTM** | B163 | *Standard Specification for Seamless Nickel and Nickel-Alloy Condenser and Heat-Exchanger Tubes* | | **ASME** | SB-535 / SB-163 | ASME Boiler and Pressure Vessel Code versions of the ASTM standards. | | **UNS** | **N08330** | Unified Numbering System designation. | | **EN (DIN)** | 10095 | *Heat resisting steels and nickel alloys* (Designation: X 15 NiCrSi 36 16 or 1.4886) | **Common Types & Specifications:** * **Seamless Tube (SMLS):** Preferred for high-pressure applications, severe corrosive atmospheres, and radiant tubes. Offers uniform wall thickness and no weld seam. * **Welded Tube:** A cost-effective solution for many structural, guide, and protector tube applications. * **Dimensions:** Conforms to standard tubular sizes and can be supplied to custom diameters and wall thicknesses. --- ### **Product Applications** Alloy 330 tube is indispensable in industries that operate at the upper limits of material temperature capabilities. 1. **Industrial Furnaces & Heat Treating:** * **Radiant Tubes:** The premier application. Used in carburizing, carbonitriding, and annealing furnaces to contain burner gases and radiate heat uniformly to the workload. * **Retorts and Muffles:** As a sealed inner chamber to protect the workload from combustion gases in atmosphere furnaces. * **Heat Exchanger Tubes:** In recuperators and convection sections to preheat combustion air from hot exhaust gases, improving furnace efficiency. * **Thermocouple Protection Sheaths:** To shield temperature sensors in harsh furnace environments. 2. **Petrochemical Processing:** * **Transfer Lines:** For conveying hot process gases in ethylene cracking and reformer furnaces. * **Pyrolysis Coils:** Within the firebox of cracking furnaces where resistance to carburization and thermal cycling is critical. 3. **Power Generation & Environmental:** * **Waste Heat Recovery Systems:** Tubes in boilers and heat recovery steam generators (HRSGs). * **Incineration Systems:** Superheater tubes and ducting for hot exhaust gases in waste-to-energy plants. 4. **Glass & Ceramic Manufacturing:** * **Rollers and Support Tubes:** In annealing lehrs and kilns for transporting glass and ceramic products. --- ### **Fabrication & Welding** * **Welding:** Alloy 330 tube exhibits excellent weldability. Common processes include: * **Gas Tungsten Arc Welding (GTAW/TIG):** Preferred for its precision and clean welds, especially on thin-walled tubes. * **Gas Metal Arc Welding (GMAW/MIG):** Used for faster welding on thicker sections. * **Recommended Filler Metals:** * **ERNiCr-3 (Alloy 82):** A versatile nickel-chromium filler metal suitable for a wide range of high-temperature services. * **ERNiCrSi-1:** The matching filler metal for UNS N08330, providing optimal properties for severe carburizing/oxidizing conditions. * **Forming & Bending:** The tube can be cold bent using standard tube-bending equipment. For tight radius bends, annealing may be required to relieve work-hardening stresses. ### **Other / Similar Alloys** * **RA 330®:** A widely recognized trademark for a high-quality version of UNS N08330. * **Alloy 800H/HT (UNS N08810/N08811):** Offers superior creep rupture strength at very high temperatures but is generally less resistant to carburization than 330. * **Alloy 601 (UNS N06601):** Higher chromium and aluminum content for superior oxidation resistance; often used for radiant tubes. * **Alloy 309/310S Stainless Steel:** Lower-cost options for oxidizing services but with significantly lower high-temperature strength and poor resistance to carburization. **Conclusion:** **Alloy 330 / Incoloy 330 Tube** is a cornerstone material for high-temperature engineering. Its robust combination of nickel, chromium, and silicon delivers unmatched resistance to oxidation, carburization, and thermal fatigue, making it the preferred choice for critical components like radiant tubes, heat exchangers, and process tubing. By selecting Alloy 330 tube, engineers ensure maximum service life, operational reliability, and cost-effectiveness in the most punishing thermal environments.

Packing of Standard Packing: Typical bulk packaging includes palletized plastic 5 gallon/25 kg. pails, fiber and steel drums to 1 ton super sacks in full container (FCL) or truck load (T/L) quantities. Research and sample quantities and hygroscopic, oxidizing or other air sensitive materials may be packaged under argon or vacuum. Solutions are packaged in polypropylene, plastic or glass jars up to palletized 2707 gallon liquid totes Special package is available on request.