Product Description
Alloy 20 (Carpenter 20Cb-3 / Alloy 20Cb3) is an austenitic iron-nickel-chromium superalloy engineered for resistance to sulfuric acid and stress-corrosion cracking.
Chemical Composition Data
| Element | Symbol | Minimum Value | Maximum Value | Nominal / Role |
| Nickel | Ni | 32.50 | 35.00 | Austenitic matrix & SCC resistance |
| Chromium | Cr | 19.00 | 21.00 | Oxidation & acid corrosion resistance |
| Iron | Fe | 31.00 | 44.00 | Balance base element |
| Copper | Cu | 3.00 | 4.00 | Sulfuric acid resistance enhancement |
| Molybdenum | Mo | 2.00 | 3.00 | Pitting & crevice corrosion resistance |
| Niobium + Tantalum | Nb + Ta | 0.48 | 1.00 | Carbide stabilization (8 x C minimum) |
| Carbon | C | 0.00 | 0.07 | Intergranular corrosion control |
| Manganese | Mn | 0.00 | 2.00 | Deoxidizer / structural stabilizer |
| Silicon | Si | 0.00 | 1.00 | Processing additive |
| Phosphorus | P | 0.00 | 0.035 | Impurity limit |
| Sulfur | S | 0.00 | 0.035 | Impurity limit |
Material & Standard Specification Identifiers
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UNS Designation: N08020
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Werkstoff Number: 2.4660
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EN Standard Designation: NiCr20CuMo / X1NiCrMoCuN25-20-7
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Common Industry Names: Alloy 20, Carpenter 20Cb3, 20Cb-3, Incoloy Alloy 20
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ASTM Specifications: B463, B473, B464, B366, B462, B472, B729
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ASME Specifications: SB-463, SB-473, SB-464, SB-366, SB-462
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AWS Welding Consumables: ER320LR, E320LR-16
Physical & Mechanical Property Data
| Property Parameter | Metric Value | Imperial Value |
| Density | 8.05 | 0.291 |
| Melting Point Range Low | 1350 | 2460 |
| Melting Point Range High | 1430 | 2600 |
| Tensile Strength Annealed | 550 to 620 | 80 to 90 |
| Yield Strength 0.2 Percent Offset | 240 to 300 | 35 to 43 |
| Elongation Percentage in 50mm | 30 to 45 | 30 to 45 |
| Hardness Brinell Maximum | 217 | 217 |
| Hardness Rockwell B Maximum | 95 | 95 |
Scrap Recycling & Material Sorting Data
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Scrap Trade Category: High-Nickel Superalloy / Austenitic Stainless Scrap
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Primary Valuation Drivers: High Nickel content (32.50 to 35.00), Copper content (3.00 to 4.00), and Molybdenum content (2.00 to 3.00)
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XRF Analyzer Verification Windows: Ni 32 to 36, Cr 19 to 21, Cu 3 to 4, Mo 2 to 3, Nb 0.5 to 1.0
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Common Industrial Scrap Source Forms: Process piping, heat exchanger tubes, pump impellers, valves, pickling hooks, and mixing tanks
High-Temperature and Corrosion ResistanceUdimet 500 alloy is specifically designed to perform under extreme temperatures-up to 980C-and harsh environments, making it a preferred material for aerospace and turbine applications. Its excellent corrosion resistance ensures long-lasting performance, especially at elevated temperatures, reducing maintenance and replacement needs.
Outstanding Mechanical PropertiesDelivering an ultimate tensile strength of up to 1550 MPa and yield strength up to 1120 MPa, Udimet 500 stands out for its durability and structural integrity. These strengths, combined with remarkable creep resistance, allow components to retain their shape and performance in high-stress, high-heat conditions.
Versatility in Forms and ApplicationsAvailable as bars, blades, strips, rods, billets, and scrap, Udimet 500 addresses diverse industry requirements. Whether you are a fabricator, supplier, or manufacturer, the alloy's customizable thickness and length options support tailored solutions in aerospace, power generation, industrial, and gas turbine sectors.
FAQ's of Nickel Cobalt Alloy Udimet 500 Bars / Udimet 500 Scrap / Udimet 500 Blades /:
Q: How is Udimet 500 alloy typically used in industrial applications?
A: Udimet 500 is widely applied in turbine blades, gas turbine components, and other high-stress industrial equipment. Its superior high-temperature strength and excellent corrosion resistance make it the material of choice in aerospace, power generation, and demanding industrial settings where reliability and longevity are crucial.
Q: What benefits does Udimet 500 offer for high-temperature environments?
A: The alloy's resistance to oxidation and corrosion at temperatures up to 980C, combined with its high tensile strength and hardness, ensures excellent performance in extreme heat. This makes it ideal for applications like turbines and aerospace components that operate under high thermal stress.
Q: When should Udimet 500 be selected over other nickel-based alloys?
A: Udimet 500 should be considered when an application requires a combination of high ultimate tensile strength, significant yield strength, superior creep resistance, and operational temperatures approaching 980C. It is especially valuable where extended component lifetimes and minimal maintenance are priorities.
Q: What processing steps are involved in manufacturing Udimet 500 bars and blades?
A: The manufacturing process generally includes forging or hot working, followed by precise solution heat treatment to optimize mechanical properties. The alloy is then machined to required shapes and dimensions. Due to its high strength and hardness, machining can be challenging and may require specialized tools.
Q: Where can Udimet 500 alloys be sourced in India?
A: Udimet 500 is available through multiple channels, including dealers, exporters, manufacturers, suppliers, and fabricators across India. Customized orders regarding length, weight, and form can be fulfilled based on specific project requirements.
Q: Is Udimet 500 alloy suitable for use in magnetic-sensitive environments?
A: Yes, Udimet 500 is non-magnetic in its annealed condition, making it appropriate for use in environments where magnetic reactivity must be minimized, such as in some aerospace and instrumentation applications.