INCONEL® Alloy 625: Comprehensive Product Introduction
Introduction to INCONEL® Alloy 625
INCONEL® alloy 625 is a nickel-based superalloy known for its exceptional strength, corrosion resistance, and versatility in extreme environments. Developed to withstand high temperatures and aggressive chemical environments, this alloy is widely utilized across various industries. This article provides a detailed overview of INCONEL® alloy 625, covering its chemical composition, mechanical properties, corresponding grades, industry applications, available forms, sizes, and production standards across different countries.
Chemical Composition of INCONEL® Alloy 625
INCONEL® alloy 625 is composed of precise elements to achieve its remarkable properties:
| Element | Composition (%) |
|---|---|
| Nickel (Ni) | 58.0 min |
| Chromium (Cr) | 20.0-23.0 |
| Molybdenum (Mo) | 8.0-10.0 |
| Iron (Fe) | 5.0 max |
| Niobium (Nb) | 3.15-4.15 |
| Cobalt (Co) | 1.0 max |
| Manganese (Mn) | 0.50 max |
| Silicon (Si) | 0.50 max |
| Carbon (C) | 0.10 max |
| Phosphorus (P) | 0.015 max |
| Sulfur (S) | 0.015 max |
| Aluminum (Al) | 0.40 max |
| Titanium (Ti) | 0.40 max |
Mechanical Properties of INCONEL® Alloy 625
INCONEL® alloy 625 exhibits excellent mechanical properties suitable for demanding applications:
| Property | Value |
|---|---|
| Tensile Strength | 760 MPa (110 ksi) min |
| Yield Strength (0.2% offset) | 345 MPa (50 ksi) min |
| Elongation | 30% min |
| Hardness (Brinell) | 150-240 (varies with heat treatment) |
| Density | 8.44 g/cm³ |
Corresponding Grades in Different Countries
INCONEL® alloy 625 is identified by different grades in various countries and regions:
| Country/Region | Grade |
|---|---|
| USA | UNS N06625 |
| Germany | 2.4856 |
| France | NC22DNB4M |
| UK | NA21 |
| Japan | NCF 625 |
| China | GH3625 |
Standard Forms, Sizes, and Production Standards
Forms and Sizes
INCONEL® alloy 625 is available in various forms and sizes to meet diverse industrial needs:
| Form | Size Range |
|---|---|
| Sheets | Thickness: 0.1 mm – 50 mm |
| Plates | Thickness: 0.3 mm – 100 mm |
| Bars | Diameter: 5 mm – 300 mm |
| Wire | Diameter: 0.1 mm – 10 mm |
| Tubes | Outer Diameter: 6 mm – 200 mm |
| Pipes | Outer Diameter: 10 mm – 300 mm |
| Fittings | Various configurations as per standards |
| Forgings | Various shapes and sizes as per standards |
Production Standards
INCONEL® alloy 625 complies with several international production standards:
| Standard | Description |
|---|---|
| ASTM B443 | Sheets, plates, and strips |
| ASTM B446 | Bars, rods, and wires |
| ASTM B444 | Seamless pipes and tubes |
| ASTM B704 | Welded tubes |
| ASTM B564 | Forgings |
| ASTM B366 | Fittings |
Industry Applications of INCONEL® Alloy 625
INCONEL® alloy 625 is extensively used across various industries due to its exceptional properties:
- Aerospace: Turbine blades, seals, and combustors in aircraft engines.
- Chemical Processing: Equipment for handling corrosive chemicals like sulfuric acid and hydrochloric acid.
- Marine: Components exposed to seawater and marine environments.
- Oil and Gas: Downhole equipment, tubing, and valves in oil extraction and refining.
- Power Generation: Steam turbine seals and high-pressure boiler components.
Advantages of INCONEL® Alloy 625
- Corrosion Resistance: Exhibits resistance to oxidation and chloride-induced stress corrosion cracking.
- High Strength: Retains strength and toughness at elevated temperatures up to 980°C (1800°F).
- Fabricability: Easily machined, welded, and formed into complex shapes.
- Longevity: Provides long-term performance and reliability in demanding conditions.
Conclusion
INCONEL® alloy 625 is a testament to advanced metallurgical engineering, offering unmatched strength, corrosion resistance, and versatility across industries globally. Its superior properties, combined with a wide range of forms, sizes, and adherence to international standards, make it indispensable for critical applications requiring reliability and performance in harsh environments.
By understanding its chemical composition, mechanical properties, applications, and adherence to production standards across different countries, engineers and designers can effectively leverage the unique capabilities of INCONEL® alloy 625 to enhance operational efficiency and ensure long-term durability.
For detailed technical specifications and further inquiries, referencing specific product data sheets and consulting with manufacturers is recommended.
This comprehensive introduction and detailed data sheet provide a thorough overview of INCONEL® alloy 625, emphasizing its chemical composition, mechanical properties, applications, and advantages in demanding industrial environments across different countries.