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Inconel 625 Nickel-Based Superalloy Bar
Inconel 625 is a solution-strengthened nickel-chromium-molybdenum-niobium alloy with the following core advantages:
- Exceptional Corrosion Resistance:Outstanding resistance to chloride stress corrosion cracking, pitting, seawater, and strong acids (e.g., sulfuric acid, hydrochloric acid).
- High-Temperature Performance:Maintains high strength and oxidation resistance from -196°C to 982°C; yield strength remains 480 MPa at 704°C.
- Workability:Excellent hot/cold formability, weldable without cracking susceptibility, and suitable for precision machining.
Chemical Composition (wt%)
Element | Ni | Cr | Mo | Nb | Fe | C | Si | Mn | P | S |
Content | ≥58 | 20–23 | 8–10 | 3.15–4.15 | ≤5 | ≤0.10 | ≤0.50 | ≤0.50 | ≤0.015 | ≤0.015 |
1. Performance Characteristics
1.1 Corrosion Resistance
Exhibits strong corrosion resistance in chlorides, seawater, and acidic environments (such as sulfuric and hydrochloric acids), with excellent resistance to pitting, crevice corrosion, and stress corrosion cracking.
It exhibits excellent resistance to high-temperature oxidizing and sulfiding environments, making it suitable for chemical and marine engineering.
1.2 High-Temperature Performance
It can withstand long-term operating temperatures up to 950°C and short-term temperatures up to 1100°C, maintaining high strength and stability even at high temperatures.
It is suitable for high-temperature applications such as aircraft engine combustion chambers and gas turbine hot-end components.
1.3 Mechanical and Processing Properties
Through solid solution strengthening with molybdenum and niobium, it combines high strength and toughness with outstanding fatigue resistance.
It has excellent weldability, maintaining performance without the need for post-weld heat treatment, making it suitable for the manufacture of complex structures.
2. Main Applications
2.1 Aerospace
It is used in the manufacture of turbine components, aircraft nozzles, exhaust systems, and rocket propulsion components, meeting the demands of high temperatures and extreme environments.
2.2 Marine Engineering
Used in seawater desalination equipment, offshore platform piping, and submarine pressure hulls, it offers exceptional resistance to chloride ion corrosion.
2.3 Chemical Industry and Energy
Manufacturing chemical reactors, downhole oil tools, and nuclear power steam generator piping, it offers resistance to strong acids, high pressure, and corrosive media.
Inconel 625 alloy bar, due to its comprehensive properties, is an ideal material for critical components in extreme environments.
Surface Treatment
- Polishing:Surface roughness Ra ≤ 0.8 μm for high-purity applications (e.g., chemical processing).
- Pickling & Passivation:Enhances corrosion resistance and removes oxide scale.
- Custom Coatings:Optional PTFE or ceramic coatings for extreme service conditions.
Why Choose Us ?
- Material Purity:Produced via Vacuum Induction Melting (VIM) + Electroslag Remelting (ESR) for ultra-low impurity content.
- Full-Size Range:Diameter Φ5mm – Φ300mm, accepting custom dimensions.
- Quality Assurance:Third-party SGS reports covering chemistry, mechanical properties, and ultrasonic testing.
Applications & Industries
Aerospace:
High-power density actuators.
Electronics:
Precision sensors & MEMS components.
Energy:
Magnetic coupling devices for turbines.
Frequently Asked Questions
Q1: How to choose between Inconel 625 and 316L stainless steel?
A: Inconel 625 offers superior corrosion resistance and high-temperature strength vs. 316L but at a higher cost. Recommended for extreme environments.
Q2: Is the bar stock weldable?
A: Yes. Use ERNiCrMo-3 filler wire. Post-weld heat treatment is not required.
Q3: Minimum Order Quantity (MOQ)?
A: Standard sizes: 50KGS. Custom sizes require drawings for evaluation.
Q4: How does Inconel 625 perform in acidic environments?
A: Resists acids like nitric, sulfuric, and hydrochloric acid, even at elevated temperatures (e.g., 40°C in HCl).
Q5: Are there different grades of Inconel 625 rods?
A: Yes, Grade 1 (annealed at ≥871°C) and Grade 2 (annealed at ≥1093°C) with slight variations in mechanical properties.
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