Alloy 330，Incoloy 330 ，,E FORU

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

### **Introduction to Alloy 330 / Incoloy 330 (UNS N08330)** **Alloy 330** (commonly known by its trade name **Incoloy 330**) is a premier nickel-iron-chromium austenitic superalloy designed for exceptional high-temperature service. Unlike many alloys tailored for aqueous corrosion resistance, Alloy 330's primary strength lies in its outstanding resistance to oxidation, carburization, and thermal shock in temperatures ranging from 1000°F to 2200°F (540°C to 1200°C). Its balanced composition provides a stable, surface-adherent oxide layer that protects the base metal from further degradation under cyclic heating and cooling conditions. This makes it a versatile and reliable material for the most demanding furnace applications and heat treatment equipment. --- ### **Chemical Composition (Weight %)** The composition of Alloy 330 is optimized for high-temperature stability rather than chloride or aqueous corrosion resistance. | Element | Content (%) | Role in the Alloy | | :--- | :--- | :--- | | **Nickel (Ni)** | 34.0 - 37.0 | Provides fundamental resistance to oxidation and carburization; stabilizes the austenitic phase. | | **Chromium (Cr)** | 17.0 - 20.0 | Forms a protective, adherent chromium oxide scale (Cr₂O₃) for oxidation resistance. | | **Iron (Fe)** | Balance | The base element of the alloy. | | **Silicon (Si)** | 0.75 - 1.50 | A critical element that enhances resistance to carburization and oxidation, especially in cyclic service. | | **Manganese (Mn)** | ≤ 2.00 | Aids in sulfur tolerance and hot workability. | | **Carbon (C)** | ≤ 0.08 | Strengthens the alloy at high temperatures. Controlled to prevent excessive carbide formation. | | **Phosphorus (P)** | ≤ 0.030 | Impurity, controlled for weldability. | | **Sulfur (S)** | ≤ 0.030 | Impurity, kept low to prevent hot shortness. | **Key Feature:** The combination of **high Nickel** and **medium Chromium**, supplemented with **Silicon**, creates a robust alloy that resists scaling, metal dusting, and embrittlement in high-temperature environments. --- ### **Physical Properties** | Property | Value | | :--- | :--- | | **Density** | 8.0 g/cm³ (0.289 lb/in³) | | **Melting Point** | 1371 - 1427 °C (2500 - 2600 °F) | | **Specific Heat** | 460 J/kg·K (0.11 Btu/lb·°F) at 20°C | | **Thermal Conductivity** | 12.5 W/m·K (86.5 Btu·in/hr·ft²·°F) at 100°C | | **Thermal Expansion** | 14.4 μm/m·°C (8.0 μin/in·°F) from 20-300°C | | **Modulus of Elasticity** | 196 GPa (28.4 x 10⁶ psi) at 21°C | --- ### **Mechanical Properties (Typical Room Temperature for Annealed Condition)** | Property | Value | | :--- | :--- | | **Tensile Strength** | 620 MPa (90 ksi) min | | **Yield Strength (0.2% Offset)** | 310 MPa (45 ksi) min | | **Elongation (% in 2 inches)** | 30% min | | **Hardness (Rockwell B)** | ≤ 85 HRB | *Note: Alloy 330 retains a significant portion of its strength at elevated temperatures, which is a key reason for its use.* --- ### **International Standards** Alloy 330 is covered by a range of international standards for different product forms. | Product Form | ASTM / ASME | UNS | EN / DIN | | :--- | :--- | :--- | :--- | | **Plate, Sheet, Strip** | ASTM B536, ASME SB-536 | **N08330** | EN 10095 (X 15 NiCrSi 36 16) | | **Bar & Wire** | ASTM B535, ASME SB-535 | **N08330** | - | | **Seamless Pipe & Tube** | ASTM B535, ASTM B163, ASME SB-535, SB-163 | **N08330** | - | | **Welding Filler Wire** | AWS A5.14 / A5.14M (ERNiCrSi-1) | **N08330** | - | *The European standard designation is often referred to as **1.4886**.* --- ### **Product Applications** Alloy 330 is the material of choice for critical high-temperature components across numerous industries. Its primary applications include: 1. **Heat Treating Industry:** * **Radiant Tubes:** For gas carburizing, carbonitriding, and neutral hardening furnaces. * **Muffles & Retorts:** To contain the atmosphere and protect the workload. * **Baskets, Trays, and Fixtures:** For carrying parts through the furnace. Resists distortion and scaling under heavy loads at high temperatures. * **Fans and Belts:** For atmosphere circulation and conveyor systems. 2. **Petrochemical Processing:** * **Reformer & Pyrolysis Tubes:** In hydrogen reformer and ethylene cracking furnaces where resistance to carburization and thermal cycling is critical. * **Transfer Lines:** For handling hot process gases. 3. **Industrial Heating:** * **Soaking Pit Covers:** In steel mill operations. * **Salt Pots:** For liquid carburizing and neutral baths. * **Oven Liners and Heating Element Sheaths:** Especially in electric furnaces. 4. **Calciners & Incinerators:** * Components and internals for waste processing and mineral calcining equipment. 5. **Glass Manufacturing:** * **Springs, Rolls, and Mold Components:** Used in the annealing and bending lehrs where high temperature strength and resistance to thermal fatigue are required. --- ### **Key Characteristics & Advantages** * **Excellent Oxidation Resistance:** Up to 1177°C (2150°F). * **Superior Carburization Resistance:** Ideal for use in rich carbon atmospheres. * **Good Resistance to Metal Dusting:** A form of aggressive carburization. * **High-Temperature Strength:** Excellent creep and rupture strength. * **Thermal Stability:** Resists embrittlement from sigma phase formation after long-term exposure. * **Good Thermal Fatigue Resistance:** Performs well under cyclic heating and cooling conditions. ### **Other / Similar Alloys** * **RA 330®:** A trade name for a specific version of UNS N08330, often considered the benchmark. * **Alloy 800H/HT (UNS N08810/N08811):** Higher temperature strength, but generally lower oxidation and carburization resistance than 330. * **Alloy 601 (UNS N06601):** Higher chromium and aluminum content for even better oxidation resistance. * **Alloy 600 (UNS N06600):** Lower iron content; good oxidation resistance but less effective against carburization compared to 330. * **Alloy 310S (UNS S31008):** A stainless steel with high chromium content for oxidation resistance, but lacks the nickel content for superior carburization resistance. **Conclusion:** **Alloy 330 / Incoloy 330** is a workhorse material in the world of high-temperature engineering. Its robust balance of nickel, chromium, and silicon provides an unmatched combination of resistance to oxidation, carburization, and thermal fatigue, making it an essential and cost-effective solution for long service life in the most punishing heat treatment and processing 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 2703 gallon liquid totes Special package is available on request.