Alloy 330，Incoloy 330 Pipe，,E FORU

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

### **Product Introduction: Alloy 330 / Incoloy 330 Pipe (UNS N08330)** **Alloy 330 Pipe** is a high-temperature, nickel-iron-chromium alloy tubular product renowned for its exceptional resistance to oxidation, carburization, and thermal cycling. As a pivotal component in high-temperature industrial systems, this pipe is designed to convey hot gases, contain aggressive atmospheres, and serve as structural elements in environments where temperatures can exceed 2000°F (1093°C). Available in both seamless and welded forms, Alloy 330 pipe offers a reliable solution for constructing durable and long-lasting thermal processing systems, ensuring operational integrity and reducing downtime in the most demanding applications such as heat treating, petrochemical processing, and calcining. --- ### **Chemical Composition (Weight %)** The chemical composition is meticulously balanced to form a stable, protective oxide layer that resists degradation under extreme heat and cyclic conditions. | Element | Content (%) | Role in the Alloy | | :--- | :--- | :--- | | **Nickel (Ni)** | 34.0 - 37.0 | Provides the foundation for resistance to oxidation and carburization; stabilizes the austenitic structure. | | **Chromium (Cr)** | 17.0 - 20.0 | Forms a protective, self-healing chromium oxide scale (Cr₂O₃) on the surface, essential for oxidation resistance. | | **Iron (Fe)** | Balance | The base element of the alloy. | | **Silicon (Si)** | 0.75 - 1.50 | A critical addition that significantly enhances resistance to carburization and oxidation, particularly in cyclic service. | | **Manganese (Mn)** | ≤ 2.00 | Aids in hot workability and provides some sulfur tolerance. | | **Carbon (C)** | ≤ 0.08 | Contributes to high-temperature strength. | | **Phosphorus (P)** | ≤ 0.030 | Impurity, controlled for weldability. | | **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 properties of the pipe will conform to the relevant ASTM/ASME standards.* --- ### **International Standards** Alloy 330 pipe is manufactured to meet several key international standards that govern dimensions, tolerances, and testing. | 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 & Schedules:** * **Seamless Pipe (SMLS):** Superior for high-pressure applications and corrosive atmospheres. * **Welded Pipe:** A cost-effective option for many structural and non-critical pressure applications. * **Standard Schedules:** Such as SCH 10S, SCH 40S, SCH 80S, complying with ASME B36.19M. --- ### **Product Applications** Alloy 330 pipe is deployed in critical high-temperature systems across various industries due to its ability to maintain structural integrity under thermal stress and corrosive atmospheres. 1. **Heat Treating & Industrial Furnaces:** * **Radiant Tubes:** The primary application. Used in carburizing, carbonitriding, and annealing furnaces to carry burner gases and radiate heat to the workload. * **Retorts and Muffles:** As a containment vessel to separate the protective atmosphere from the furnace combustion gases. * **Atmosphere Inlet & Exhaust Piping:** For supplying and removing process gases from the furnace chamber. * **Heat Exchanger Tubes:** Recuperators for preheating combustion air using exhaust gases. 2. **Petrochemical & Chemical Processing:** * **Transfer Lines:** For conveying hot process gases in ethylene cracking and hydrogen reformer furnaces. * **Pyrolysis Tubes:** Within the firebox of cracking furnaces where resistance to carburization and thermal cycling is paramount. 3. **Power Generation & Incineration:** * **Superheater Tubes:** In waste-to-energy plants and boilers. * **Exhaust Ducting:** For hot flue gases in incinerators and power generation systems. 4. **Glass & Ceramic Manufacturing:** * **Roller Tubes and Support Pipes:** In annealing lehrs and processing lines where hot glass or ceramic products are conveyed. --- ### **Fabrication & Welding** * **Welding:** Alloy 330 pipe exhibits excellent weldability. Common processes include: * Gas Tungsten Arc Welding (GTAW/TIG) * Gas Metal Arc Welding (GMAW/MIG) * **Recommended Filler Metals:** * **ERNiCr-3 (Alloy 82):** A versatile nickel-chromium filler metal suitable for a wide range of high-temperature applications. * **ERNiCrSi-1:** The matching filler metal for UNS N08330, providing optimal properties for severe carburizing/oxidizing conditions. * **Forming:** The pipe can be cold bent using standard tube-bending equipment, though annealing may be required after severe deformation. ### **Other / Similar Alloys** * **RA 330®:** A prominent 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 lower high-temperature strength and poor resistance to carburization. **Conclusion:** **Alloy 330 / Incoloy 330 Pipe** is a critical engineering material for constructing high-temperature systems. Its unique combination of nickel, chromium, and silicon delivers unmatched resistance to oxidation, carburization, and thermal fatigue, making it the preferred choice for radiant tubes, process piping, and heat exchangers in industries where reliability and long service life at extreme temperatures are non-negotiable.

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 2706 gallon liquid totes Special package is available on request.