ZYTC Alloy is an ISO 9001 and AS 9120B certified superalloy manufacturer and supplier, offering Alloy 825 (2.4858) at factory-direct prices with full material traceability and fast global delivery. 2.4858 is the Werkstoff designation for the nickel-based alloy 825. Incoloy 825 (UNS N08825 / W.Nr. 2.4858) is a nickel-iron-chromium alloy with additions of molybdenum, copper, and titanium. This alloy was primarily developed to provide superior resistance to sulfuric acid and other aggressive corrosive environments. If you cannot find the product you are looking for, please feel free to contact us.
Product Specifications & Physical DataNickel alloy 825 is available in various mill forms for chemical processing, oil & gas, marine, and pollution control applications. The alloy offers excellent corrosion resistance, good mechanical properties, and is readily weldable. Available Forms: Solid bar (¾″ to 10″), round bar, flat bar, sheet, plate, pipe, tube, fittings, flanges, forgings, wire, welding wire Specifications: UNS N08825, Werkstoff Nr. 2.4858, ASTM B425 (bar), ASTM B424 (plate), ASTM B423 (pipe/tube), ASTM B163 (tube), NACE MR0175/ISO 15156
| Chemical Composition (Weight %) | Alloy 825 (UNS N08825) Specification |
|---|
| Nickel (Ni) | 38.0 - 46.0 | | Chromium (Cr) | 19.5 - 23.5 | | Iron (Fe) | 22.0 min. (Balance) | | Molybdenum (Mo) | 2.5 - 3.5 | | Copper (Cu) | 1.5 - 3.0 | | Titanium (Ti) | 0.6 - 1.2 | | Carbon (C) | 0.05 max. | | Manganese (Mn) | 1.0 max. | | Silicon (Si) | 0.5 max. | | Sulfur (S) | 0.03 max. | | Aluminum (Al) | 0.2 max. |
| Physical Properties | Metric | Imperial |
|---|
| Density | 8.14 g/cm³ | 0.294 lb/in³ | | Melting Range | 1370 - 1400°C | 2500 - 2550°F | | Modulus of Elasticity | 196 GPa | 28.4 × 10⁶ psi | | Coefficient of Expansion (20-100°C) | 14.0 µm/m·°C | 7.8 µin/in·°F | | Thermal Conductivity | 11.1 W/m·K | 77 BTU·in/hr·ft²·°F | | Magnetic Permeability | Non-magnetic | < 1.02 |
| Mechanical Properties (Bar – Annealed) | Metric | Imperial |
|---|
| Tensile Strength (min.) | 585 MPa | 85 ksi | | Yield Strength (0.2% offset, min.) | 240 MPa | 35 ksi | | Elongation (min.) | 30% | 30% | | Hardness (Annealed) | 150-220 HB | 150-220 HB |
Operating Conditions & Selection CriteriaAlloy 825 is specified when designers require a nickel-iron-chromium alloy with excellent corrosion resistance, particularly against sulfuric acid and chloride-induced attack. Service Temperature Range: Mechanical properties are relatively constant from very low temperatures (cryogenic, down to -150°C) up to 540°C (1000°F). Above this temperature, there is the possibility of undesirable microstructural phase changes that significantly reduce impact toughness and elongation. Corrosion Resistance: Outstandingly excellent compared to conventional chrome-nickel-molybdenum steel. The resistance to chloride-induced intergranular corrosion, pitting, crevice corrosion, and stress corrosion cracking is the main application property of this material. Sulfuric Acid Resistance: The alloy was primarily developed to better resist sulfuric acid. Non-Magnetic: Non-magnetic properties make it suitable for downhole tooling applications. Weldability: Alloy 825 is easy to weld. Steels 2.4621 and 2.4831 are recommended as filler metals.
Product Forms & Availability – Alloy 825 (2.4858 / UNS N08825)| Product Form | Size Range | Condition |
|---|
| Round Bar | ¾"up to 10" | Annealed | | Flat Bar | Custom | Annealed | | Sheet | Various | Annealed | | Plate | Various | Annealed | | Strip | Various | Annealed | | Tube | Custom | Annealed | | Pipe | Custom | Annealed | | Wire | Various | Annealed | | Forging Stock | Any size | Annealed |
For all stock availability, contact Sales.
ApplicationsValve Components: Valve stems, seats, trim for corrosive service Thermowells: Temperature sensor protection in aggressive environments Sensors: Instrumentation for chemical and petrochemical plants Fasteners: Bolts, nuts, studs for sulfuric acid and sour service Downhole Tooling: Non-magnetic components for oil & gas exploration Chemical Processing: Reactors, heat exchangers, piping for sulfuric and phosphoric acid service Marine: Seawater piping, offshore platform equipment
Factory Price – Alloy 825 Bar (2.4858 / UNS N08825)Indicative factory pricing (FOB China): | Diameter Range | Product Form | Condition | Price (USD/kg) |
|---|
| ¾"– 1"(19mm – 25mm) | Round Bar | Annealed | $12 – $25 | | 1"– 2"(25mm – 50mm) | Round Bar | Annealed | $11 – $23 | | 2"– 4"(50mm – 100mm) | Round Bar | Annealed | $10 – $21 | | 4"– 6"(100mm – 150mm) | Round Bar | Annealed | $9 – $19 | | 6"– 10"(150mm – 254mm) | Round Bar | Annealed | $8 – $17 |
Volume discounts available for orders above 500 kg. Custom sizes and specifications available – contact us for a firm quote.
Delivery Lead Times (after pre-payment confirmation)| Stock Status | Delivery Time |
|---|
| Products in stock | Within 3 days | | Raw material in stock | Within 10 days | | Re-melting required | 15 – 25 days |
Contact ZYTC Alloy TodayRequest a quote for 2.4858 / Alloy 825 (UNS N08825 / Incoloy 825) – Nickel-Iron-Chromium Alloy – Outstanding Sulphuric Acid & SCC Resistance – Stable from -150°C to 540°C . Please provide: Diameter / size Product form (bar / plate / sheet / tube / wire / forging stock) Length or weight required Quantity Destination port Any special certification requirements
📧 Email: daisy@zytcsteel.com
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