Special Products
Inconel 718
Inconel 718 is a high-strength, corrosion-resistant nickel-chromium alloy known for its exceptional mechanical properties at elevated temperatures. It is precipitation hardenable, meaning it gains strength through heat treatment, and exhibits outstanding weldability, oxidation resistance, and creep-rupture strength. Inconel 718 is widely used in aerospace, power generation, chemical processing, and marine industries due to its ability to maintain structural integrity in extreme environments.
Key Features
- High Temperature Resistance: Maintains strength and oxidation resistance up to 700°C (1300°F).
- Excellent Corrosion Resistance: Performs well in harsh environments, including those with acids, salts, and seawater.
- Outstanding Strength: Offers superior tensile, fatigue, and creep resistance even after prolonged exposure to high temperatures.
- Good Weldability: Can be welded without cracking due to its balanced composition and hardening response.
- Long-Term Durability: Ideal for critical components where service life is essential under stress and heat.
Chemical Composition
Element | Composition (%) |
Nickel (Ni) | 50.0 – 55.0 |
Chromium (Cr) | 17.0 – 21.0 |
Iron (Fe) | Balance |
Niobium + Tantalum (Nb + Ta) | 4.75 – 5.50 |
Molybdenum (Mo) | 2.80 – 3.30 |
Titanium (Ti) | 0.65 – 1.15 |
Aluminum (Al) | 0.20 – 0.80 |
Cobalt (Co) | ≤ 1.00 |
Carbon (C) | ≤ 0.08 |
Manganese (Mn) | ≤ 0.35 |
Silicon (Si) | ≤ 0.35 |
Sulfur (S) | ≤ 0.015 |
Mechanical Properties
Property | Value |
Tensile Strength | ≥ 1240 MPa |
Yield Strength (0.2% Offset) | ≥ 1035 MPa |
Elongation | ≥ 12% |
Hardness | ~331 HB |
Operating Temperature Range | -253°C to 700°C |
Applications
- Aerospace Industry: Gas turbine engines, jet engine parts, rocket motors, and aircraft fasteners.
- Power Generation: Turbine blades, exhaust systems, and nuclear reactor components.
- Oil & Gas: Downhole tools, valves, and wellhead components.
- Marine Industry: High-pressure, corrosion-resistant parts exposed to seawater.
- Chemical Processing: Heat exchangers, reactors, and acid handling equipment.
Forms Available
- Sheets & Plates: Used in high-temperature structural components and cladding applications.
- Bars & Rods: Ideal for machining into custom components for aerospace and oil & gas sectors.
- Pipes & Tubes: Employed in high-pressure fluid transport systems across the power and chemical industries.
Equivalent Grades
Standard | Equivalent Grade |
UNS | N07718 |
W.Nr | 2.4668 |
AMS | 5662, 5663 |
ASTM | B637 |
Advantages
- Exceptional mechanical properties at cryogenic and high temperatures.
- Resists pitting, crevice corrosion, and stress-corrosion cracking.
- High fatigue strength and creep resistance.
- Suitable for high-stress environments requiring long-term reliability.
Surface Finish and Coatings
To enhance durability:
- Standard finishes include polished or pickled surfaces.
- Coatings such as epoxy or anti-corrosion layers can be applied for specific requirements.
Quality Assurance & Packaging
High-quality standards are maintained throughout the manufacturing process:
- Certifications: Compliant with ASTM B637, AMS 5662/5663, and other relevant standards.
- Packaging: Pipes and components are securely packaged with protective materials like wooden crates, plastic wrap, and end caps to prevent transit damage.
FAQ's
Products
Industry We Serve
- Oil & Gas industries
- Chemical process industries
- Pump and valve in high pressure component
- Food industries
- Pulp and paper industry
- Aerospace industry
- Power plant
- Mechanical component
- Sugar industry
- Cement industry