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Special Metals INCONEL® Alloy 625
Subcategory: Metal; Nickel Base; Superalloy
Key Words: ASME SB-443, SB-444, SB-446, SB-564, Boiler Code Sections I, III, VIII, IX; AFNOR NC 22 D Nb; VdTUV 499, AMS 5581, AMS 5599, AMS 5666, AMS 5837; DIN 17744, 17750-17752, 17754; Werkstoff Nr. 2.4856; NACE MR-01-75, UNS N06625; BS 3072, 3074, 3076 (NA21); ASTM B443, ASTM B444, ASTM B446, ASTM B564, ASTM B704, ASTM B705, ASTM B751
| Component | Wt. % |  | | | Al | Max 0.4 | | | C | Max 0.1 | | | Co | Max 1 | | | Cr | 20 - 23 | | | Fe | Max 5 | |
| | Component | Wt. % | | | | Mn | Max 0.5 | | | Mo | 8 - 10 | | | Nb | 3.15 - 4.15 | | | Ni | Min 58 | |
| | Component | Wt. % | | | P | Max 0.015 | | | S | Max 0.015 | | | Si | Max 0.5 | | | Ti | Max 0.4 | |
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Material Notes:
Niobium content above includes tantalum. A nickel-chromium-molybdenum alloy with an addition of niobium that acts with the molybdenum to stiffen the alloy's matrix and thereby provide high strength without a strengthening heat treatment. The alloy resists a wide range of severely corrosive environments and is especially resistant to pitting and crevice corrosion. Used in chemical processing, aerospace and marine engineering, pollution-control equipment, and nuclear reactors. Standard product forms are round, flats, forging stock, extruded section, pipe, tube, plate, sheet, strip, and wire. Data provided by the manufacturer, Special Metals.
MicroGroup's inventory of small diameter 304 and 316 and other stainless steel, nickel based alloys, and titanium alloys exceeds 5 million feet. Redraw of material to specific sizes and shapes, as well as secondary operations to convert tubing into components and assemblies. Visit http://www.microgroup.com or Phone 1-800-ALL-TUBE (1-800 255-8823) or 1-508-533-4925.
| Physical Properties | Metric | English | Comments |
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| Density | 8.44 g/cc | 0.305 lb/inł | |
Mechanical Properties |
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| Tensile Strength, Ultimate | 880 MPa | 128000 psi | Annealed. Value at room temperature. Value at 650°C is 760 MPa. |
| Tensile Strength, Yield | 460 MPa | 66700 psi | Annealed. Value at room temperature; 0.2% offset. Value at 650°C is 290 MPa. |
| Elongation at Break | 50 % | 50 % | Annealed. Value at room temperature. Value at 650°C is 55%. |
Electrical Properties |
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| Electrical Resistivity | 0.000129 ohm-cm | 0.000129 ohm-cm | |
| Magnetic Permeability | 1.0006 | 1.0006 | at 200 oersted (15.9 kA/m) |
| Curie Temperature | Max -196 °C | Max -321 °F | |
Thermal Properties |
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| CTE, linear 20°C | 12.8 µm/m-°C | 7.11 µin/in-°F | 20-100°C |
| Heat Capacity | 0.41 J/g-°C | 0.098 BTU/lb-°F | |
| Thermal Conductivity | 9.8 W/m-K | 68 BTU-in/hr-ft˛-°F | |
| Melting Point | 1290 - 1350 °C | 2350 - 2460 °F | |
| Solidus | 1290 °C | 2350 °F | |
| Liquidus | 1350 °C | 2460 °F | |
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