Products Features
Outstanding Corrosion Resistance
Exhibits excellent resistance to stress corrosion cracking, pitting, and crevice corrosion in high-temperature and high-pressure acidic environments containing H₂S, CO₂, and Cl⁻. It is suitable for acidic service environments requiring compliance with the NACE MR0175 / ISO 15156 standard.
High Strength and Fatigue Resistance
Through precipitation hardening treatment, it maintains strength and fatigue resistance far higher than 625 alloy over a temperature range from room temperature up to approximately 700°C, making it suitable for manufacturing downhole components and connectors subjected to high cyclic loads.
Good Machining and Welding Properties
Although it has higher strength, it can still be cold and hot worked as well as welded using appropriate processes, making it suitable for manufacturing complex-shaped components such as bars, forgings, wires, and fasteners.
Technical Specifications
Chemical Composition
|
Element |
Standard Requirements |
Notes |
|
Ni |
≥ 55.0% |
Matrix elements, providing excellent corrosion resistance and high-temperature stability |
|
Cr |
19.0 - 22.5% |
Provide excellent antioxidant and corrosion resistance |
|
Mo |
5.0 - 8.0% |
Enhance corrosion resistance, especially pitting corrosion and crevice corrosion |
|
Nb+Ta |
2.75 - 4.00% |
Precipitation strengthening of key elements to form the γ\" phase |
|
Fe |
≤ 11.0% |
Structural support |
|
Ti |
1.00 - 1.7% |
Precipitation strengthening forms the γ' phase |
|
Al |
0.1 - 0.6% |
Precipitation strengthening forms the γ' phase |
|
C |
≤ 0.03% |
Strict control to maintain mechanical properties |
|
Si |
≤ 0.20% |
Strict control to improve hot working performance |
|
Mn |
≤ 0.35% |
Deoxidizer, improve hot working properties |
|
P |
≤ 0.015% |
Impurity elements |
|
S |
≤ 0.010% |
Strict control to prevent hot brittleness |
Physical Properties
|
Property |
Value/Range |
Test Conditions |
|
Density |
8.31 g/cm³ |
Room temperature (20°C) |
|
Melting Point |
1300 - 1350°C |
- |
|
Specific Heat Capacity |
420 J/kg·K |
20°C |
Mechanical Properties (Precipitation Hardened Condition, Typical Values)
|
Property |
Typical Value |
Specification |
|
Tensile Strength |
≥ 965 MPa |
ASTM B805 |
|
Yield Strength |
≥ 690 MPa |
ASTM B805 |
|
Elongation |
≥ 20% |
ASTM B805 |
|
Hardness |
≤ 35 HRC |
- |
High-Temperature Performance
At 600°C, the tensile strength remains above approximately 800 MPa.
Long-Term Usage Temperature Range: It is recommended that the long-term operating temperature range be -200°C to 700°C.
Maximum Intermittent Heat Resistance: Up to 700°C (more dependent on the stability of precipitation-hardening phases).
Antioxidation: It exhibits good oxidation resistance below 700°C, making it suitable for high-stress service environments.
Creep Resistance: It demonstrates excellent creep resistance below 600°C, outperforming most precipitation-hardened stainless steels.
Application Areas
-
Deep-sea oil and gas production (downhole tools, valve bodies, hangers)
-
Fasteners for acidic environments (compliant with NACE MR0175)
-
High-pressure chemical reactors
-
High-temperature fasteners for nuclear power
-
Flue gas desulfurization systems
-
High-temperature and high-pressure sensor housings
-
High-strength connection components for marine engineering
-
Oil and gas production control piping
-
Heat exchangers (high-strength requirements)
-
Structural components resistant to sulfide stress cracking
Customizable Material Forms
We support the production of various basic and special forms according to drawings or specifications.
|
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 Φ6-300mm |
By weight or dimensions (also by drawings) |
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, different heat treatment conditions of various grades |
Large-diameter, thick-walled pipes, special alloy composition; Pipe end processing (beveling, fixed length) |
Free forging/ mold forging, near-net shaping |
Special surfaces, precision drawing |
Why Choose Us as Your Supplier? - Reliable Engineering technology. Dependable Delivery.
We are more than just a supplier; we are your trusted material partner in China.
Vertically Integrated Production
With 20,000 square meters of owned facilities and over 10 automated production lines (annual capacity of over 8,000 tons). An internal mold center supports rapid customization and effective cost control, with no markup from intermediaries.
Strict Quality Control is Implemented at Each Stage
Key quality control points throughout the entire production process are traceable. 100% compliance with ASTM/ASME, EN, and GB standards is ensured. A material test report accompanies each batch of goods.
Reliable Delivery and Export Packaging
With over 10 years of experience exporting to Europe, North America, Southeast Asia, and the Middle East, our products are equipped with waterproof and rustproof protection. Combined with flexible shipping options, this ensures safe and timely delivery of goods.
Prenatal Sample Verification
We offer free samples for quality confirmation, and you can only place bulk orders after obtaining approval. We ensure consistency from sample to mass production through precise dimensional measurements and transparent manufacturing processes.
FAQ
Q: What are the main advantages of Inconel 725?
Q: What kind of heat treatment does Inconel 725 require?
Q: What is the maximum operating temperature?
Q: What is the difference from Inconel 625?
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