Alloy 330，Incoloy 330 Bar(Round bar, Flat bar)，,E FORU

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

### **Product Introduction: Alloy 330 / Incoloy 330 Bar (Round Bar & Flat Bar)** **Alloy 330 Bar**, available in both **Round Bar** and **Flat Bar** forms, is a high-performance nickel-iron-chromium alloy specifically engineered for severe high-temperature service. As a foundational stock material, it provides exceptional resistance to oxidation, carburization, and thermal cycling, making it indispensable for fabricating structural components in industrial heating and processing equipment. The **Round Bar** is the primary form for machining shafts, fasteners, and cylindrical parts, while the **Flat Bar** is essential for constructing brackets, supports, rails, and custom fixtures. Together, they offer engineers and fabricators versatile solutions for building and maintaining robust systems that operate reliably from 1000°F to 2200°F (540°C to 1200°C). --- ### **Chemical Composition (Weight %)** The composition is meticulously balanced to ensure stability and the formation of a protective oxide layer under extreme heat. | Element | Content (%) | Role in the Alloy | | :--- | :--- | :--- | | **Nickel (Ni)** | 34.0 - 37.0 | Provides base resistance to oxidation and carburization; stabilizes the austenitic matrix. | | **Chromium (Cr)** | 17.0 - 20.0 | Forms a tenacious, self-healing chromium oxide scale (Cr₂O₃) for superior oxidation resistance. | | **Iron (Fe)** | Balance | The base element. | | **Silicon (Si)** | 0.75 - 1.50 | A critical element that dramatically improves 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 | Enhances 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 | | **Hardness (Rockwell B)** | ≤ 85 HRB | *Note: Cold-drawn bars will exhibit higher strength and hardness values.* --- ### **International Standards** Alloy 330 Bar conforms to several key international standards, ensuring material quality and traceability. | Standard Body | Standard Number | Title (Scope) | | :--- | :--- | :--- | | **ASTM** | B535 | *Standard Specification for Nickel-Iron-Chromium-Silicon Alloys (UNS N08330 and N08332) Rod, Bar, and Wire* | | **ASME** | SB-535 | ASME Boiler and Pressure Vessel Code version of ASTM B535. | | **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 Available Forms & Conditions:** * **Round Bar:** Hot-finished, cold-drawn, or centerless ground. Available in a wide range of diameters. * **Flat Bar:** Typically hot-rolled or precision ground to specific thickness and width dimensions. * **Condition:** Annealed (for optimal machinability and corrosion resistance) or Cold-Drawn (for higher strength and better surface finish). --- ### **Product Applications** The application of Alloy 330 Bar is driven by its exceptional high-temperature properties. **Applications for Round Bar:** 1. **Machined Fasteners:** High-temperature nuts, bolts, studs, and washers for assembling furnace sections and process equipment. 2. **Shafts and Spindles:** For rollers, fans, and pumps operating in hot, corrosive atmospheres. 3. **Thermowells:** Machined from round bar to protect temperature sensors in aggressive high-temperature process streams. 4. **Furnace Components:** Machined into radiant tube hangers, burner nozzles, and support pins. 5. **Valve Components:** Stem and trim parts for high-temperature service valves. **Applications for Flat Bar:** 1. **Structural Supports & Brackets:** Used to build internal frameworks, rails, and hangers within heat treatment furnaces and ovens. 2. **Furnace Baskets & Grids:** Fabricated by welding flat bars to create trays and baskets for carrying parts during carburizing, annealing, or brazing. 3. **Heat Treating Fixtures:** Custom jigs and fixtures for holding specific parts during processing. 4. **Stiffeners and Reinforcements:** Added to furnace walls or doors to provide structural integrity at high temperatures. 5. **Retort Flanges and Sealing Surfaces:** Machined from thick flat bar stock. --- ### **Fabrication & Machining** * **Machinability:** Similar to other austenitic alloys, it has a machinability rating of around **40%**. It work-hardens rapidly and is gummy. * **Recommended Practice:** Use slow speeds, heavy feeds, sharp tooling with positive rake angles, and rigid setups. Coolant is recommended. * **Welding:** Excellent weldability using common processes like GTAW (TIG) and GMAW (MIG). Recommended filler metals include **ERNiCr-3 (Alloy 82)** and the matching **ERNiCrSi-1**. ### **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. * **Alloy 601 (UNS N06601):** Higher chromium and aluminum content for superior oxidation resistance; commonly used for radiant tubes. * **Alloy 314 (UNS S31400):** A high-chromium, high-silicon stainless steel offering good oxidation resistance at a lower cost, but with lower high-temperature strength and carburization resistance. **Conclusion:** **Alloy 330 / Incoloy 330 Bar**, in both round and flat forms, is a fundamental and versatile material for high-temperature engineering. It provides the necessary strength, stability, and resistance to create durable components that ensure long service life and operational reliability in the most demanding thermal environments, from heat-treating furnaces to petrochemical processing units.

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 2705 gallon liquid totes Special package is available on request.