Products Features
Excellent resistance to reduction acid corrosion.
It exhibits outstanding corrosion resistance in acidic media such as sulfuric acid, phosphoric acid, and nitric acid, particularly suitable for conditions where sulfuric acid concentration is ≤70% and temperature is ≤80°C. It outperforms ordinary stainless steels and most nickel-based alloys.
Excellent resistance to chloride stress corrosion cracking.
Rich in nickel and molybdenum, it exhibits exceptional resistance to stress corrosion cracking in chloride-containing environments, making it suitable for marine engineering, saltwater cooling systems, and chemical processing equipment.
Excellent high-temperature oxidation resistance and heat-resistant corrosion.
It exhibits good oxidation resistance below 980°C and can withstand corrosion from sulfur-containing atmospheres, making it suitable for high-temperature heat exchangers, flue gas treatment, and industrial furnace components.
Good machining and welding performance.
It has excellent cold and hot working properties and can be connected using conventional welding processes (such as TIG, MIG, and submerged arc welding). It is suitable for manufacturing pipes, vessels, valves, and complex structural components.
Technical Specifications
Chemical Composition
|
Element |
Standard Requirements |
Notes |
|
Ni |
38.0 – 46.0% |
Elements that provide corrosion resistance and stress corrosion resistance |
|
Cr |
19.5 – 23.5% |
Provide antioxidant and corrosion resistance capabilities |
|
Fe |
≥ 22.0% |
Structural support to reduce costs |
|
Mo |
2.5 – 3.5% |
Enhance resistance to reducing acids and pitting |
|
Cu |
1.5 – 3.0% |
Improve corrosion resistance to reducing media such as sulfuric acid |
|
Ti |
0.6 – 1.2% |
Stabilization treatment to prevent intergranular corrosion |
|
C |
≤ 0.05% |
Strict control to prevent intergranular corrosion tendency |
|
Mn |
≤ 1.0% |
Deoxidizer, improve hot working properties |
|
Si |
≤ 0.5% |
Deoxidizer |
|
P |
≤ 0.03% |
Impurity elements |
|
S |
≤ 0.03% |
Prevent hot brittleness |
Physical Properties
|
Property |
Value/Range |
Test Conditions |
|
Density |
8.14g/cm³ |
Room temperature (20°C) |
|
Melting Point |
1370 – 1400°C |
- |
|
Coefficient of Thermal Expansion (20-100°C) |
14.1 × 10⁻⁶ /K |
- |
Mechanical Properties (Annealed Condition, Typical Values)
|
Property |
Typical Value |
Specification |
|
Tensile Strength |
≥ 585 MPa |
ASTM B424 |
|
Yield Strength |
≥ 240 MPa |
ASTM B424 |
|
Elongation |
≥ 30% |
ASTM B424 |
|
Hardness |
≤ 85 HRB |
- |
High-temperature performance
Tensile strength remains above approximately 450 MPa at 540°C.
The recommended long-term service temperature range is -200°C to 540°C (with intermittent use up to 980°C in oxidizing environments).
Maximum intermittent temperature resistance: Up to 980°C (primarily for oxidation resistance, with a decrease in strength).
Oxidation resistance: Exhibits good oxidation resistance below 980°C with a dense oxide film.
Resistance to stress corrosion cracking: In chloride and acidic environments, its resistance to stress corrosion cracking is superior to that of 304 and 316 stainless steels.
Application Fields
-
Chemical processing equipment (sulfuric acid, phosphoric acid, nitric acid storage tanks and pipelines)
-
Oil and gas production (acidic gas wells, subsea pipelines)
-
Offshore engineering (seawater cooling systems, pumps and valves, heat exchangers)
-
Nuclear fuel reprocessing (dissolvers, waste liquid treatment systems)
-
Pollution control equipment (flue gas desulfurization systems)
-
Food processing equipment (handling in acidic media)
-
Pharmaceutical industry (reactors, distillation towers)
-
High-temperature heat exchangers and condensers
-
Springs and fasteners (for corrosive environments)
-
Petroleum refining (catalytic cracking, hydrodesulfurization units)
Delivery and Customization
We offer flexible and reliable supply chain solutions to ensure you receive Incoloy 825 materials that perfectly match your project requirements.
|
Form |
 Sheet/Plate
|
 Bar/Rod
|
 Seamless Pipe
|
 Strip/Sheet Coil
|
 Wire/Wire Rod
|
|---|---|---|---|---|---|
|
Conventional Range |
Thickness: 0.5 - 100 mm |
Diameter Φ6-500mm |
Outer diameter Φ10-300mm |
Thickness: 0.1 – 3.0 mm |
Diameter Φ0.5-10mm |
|
Customization Capability |
Special thick/thin rolling, ultra-wide plates; special surface treatment, fixed-length cutting |
Large-sized forged bars (up to Φ800 mm), special-shaped bars, and various heat treatment conditions |
Large-diameter thick-walled pipes, special alloy composition; Pipe end processing (beveling, fixed length) |
Different hardness conditions, special heat treatments (stabilization treatment, grain size control), acid-washed surfaces, electrolytic polishing, coatings, or special protective films |
Special surface treatment, precision drawing |
Why Choose Us? - Reliable engineering technology. Dependable delivery.
We are not just a supplier, but a trusted materials partner for you in China.
Vertically Integrated Production
Own 20,000㎡ facility with 10+ automated lines (8,000+ tons/year). In-house tooling & die center enables rapid customization and effective cost control - no middleman markup.
Strict Quality Control at Every Stage
Full traceability across key QC checkpoints throughout production. 100% compliant with ASTM/ASME, EN, and GB standards. Material test reports available with every shipment
Reliable Delivery & Export Packaging
10+ years exporting to Europe, North America, Southeast Asia & Middle East with waterproof and anti-rust protection, combined with flexible shipping options ensures safe and on-time arrival.
Sample Validation Before Mass Production
We provide free samples for quality verification, allowing you to place bulk orders only after approval. We ensure consistency from sample to mass production by accurate dimensional measurement and transparent manufacturing.
FAQ
Q: What are the main advantages of Incoloy 825?
Q: What heat treatment is required for Incoloy 825?
Q: What is the maximum operating temperature?
Q: What is the coefficient of thermal expansion?
Q: What is the difference from Inconel 625?
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