Its chemical composition includes12:
- Nickel (Ni): 38–46%
- Chromium (Cr): 19.5–23.5%
- Iron (Fe): Balance
- Molybdenum (Mo): 2.5–3.5%
- Copper (Cu): 1.5–3.0%
- Titanium (Ti): 0.6–1.2%
- Carbon (C): ≤0.05%
- Manganese (Mn): ≤1.0%
- Silicon (Si): ≤0.5%
Physical & Mechanical Properties48:
- Density: 8.14 g/cm³
- Melting Range: 1,370–1,400°C
- Tensile Strength: ≥550 MPa
- Yield Strength: ≥220 MPa
- Elongation: ≥30%
- Hardness: ≤160 HB
Product Performance Highlights
Outstanding Corrosion Resistance:
- Resists sulfuric acid, phosphoric acid, nitric acid, and chloride-induced stress corrosion cracking (SCC), outperforming standard austenitic stainless steels35.
- Excellent resistance to pitting and crevice corrosion in marine and chemical processing environments24.
High-Temperature Stability:
- Maintains mechanical integrity at temperatures up to 550°C, ideal for heat exchangers and furnace components78.
Weldability & Fabricability:
- Compatible with TIG, MIG, and arc welding methods. Post-weld heat treatment ensures consistent properties23.
- Easily machined and cold-worked into complex shapes48.
Oxidation Resistance:
- Withstands oxidation in both reducing and oxidizing atmospheres, suitable for pollution control and nuclear fuel reprocessing35.
Production Methods
Incoloy 825 round bars are manufactured through precision processes to ensure uniformity and performance78:
- Vacuum Induction Melting (VIM):
- High-purity raw materials are melted under vacuum to minimize impurities and ensure alloy homogeneity.
- Electroslag Remelting (ESR):
- Refines the microstructure and eliminates inclusions for enhanced mechanical properties.
- Hot Rolling & Cold Drawing:
- Ingots are hot-rolled into billets and further cold-drawn to achieve precise dimensions and surface finish.
- Solution Annealing:
- Bars are heated to 1,150–1,250°C and rapidly cooled to dissolve secondary phases and optimize corrosion resistance78.
Equivalent Grades & Standards
- UNS N08825
- DIN 2.4858, EN NiCr21Mo
- ASTM B423, ASTM B704, ASTM B705
- Alloy 825, W.Nr. 2.4858
- NS142 (China), NC21FeDu (France)27.
Key Application Fields
Incoloy 825 round bars are critical in industries requiring durability under extreme conditions:
- Chemical Processing:
- Reactors, heat exchangers, and piping systems handling sulfuric and phosphoric acids56.
- Oil & Gas:
- Downhole tubing, valves, and offshore platform components exposed to sour gas and seawater34.
- Marine Engineering:
- Seawater desalination plants, pump shafts, and marine heat exchangers24.
- Nuclear Energy:
- Fuel reprocessing equipment and reactor cooling systems57.
- Pollution Control:
- Scrubbers, flue gas systems, and wastewater treatment units38.
- Incoloy 825 Round Bar Supplier
- UNS N08825 Corrosion-Resistant Alloy
- Nickel-Iron-Chromium Round Bar
- ASTM B423 Incoloy 825 Applications
- Marine-Grade Incoloy 825 Rod
- Chemical Processing Alloy 825
- High-Temperature Incoloy 825 Properties
Incoloy 825 round bars deliver unmatched resistance to corrosive and high-temperature environments, making them indispensable in critical industrial applications. For custom specifications or technical support, consult a trusted supplier specializing in advanced nickel alloys.
