Is your project only requiring high-temperature oxidation resistance, yet you're paying too much for a high-strength superalloy? Before finalizing your next order, please read our GH3030 material sourcing guide. As a professional nickel alloy manufacturer, Gnee Steel offers transparent analysis to help you balance technical performance and sourcing costs. GH3030 (equivalent to Nimonic 75/EI435) is ideal for 800°C applications-provided you know how to use it correctly.
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GH3030 Material Advantages and Disadvantages Guide
GH3030 Material Advantages and Disadvantages Guide
GH3030 is a solid solution strengthened nickel-based superalloy (8ONi-20Cr). It is an early alloy developed in industry, renowned for its simple chemical composition, excellent thermal fatigue properties, and high-temperature plasticity. It typically operates at temperatures between 800°C and 1100°C. It is widely used in aero-engines, nuclear energy, and petrochemical industries.
What are the components of GH3030?
GH3030 is a solid solution strengthened high-temperature alloy, mainly composed of nickel (Ni) and chromium (Cr), with a simple chemical composition. Its typical ratio is 80% nickel and 20% chromium.
1. Chemical Composition of GH3030 (Weight Percentage)
| Element | Composition | Function |
|---|---|---|
| Nickel (Ni) | Balance (≥ 75.0%) | Source of thermal stability |
| Chromium (Cr) | 19.0 - 22.0% | Anti-oxidation layer |
| Titanium (Ti) | 0.15 - 0.35% | Grain refiner |
2. Mechanical Properties of High-Temperature Alloy GH3030 (Annealed State)
| Property | Value |
|---|---|
| Tensile Strength (Rm) | ≥ 685 MPa |
| Elongation (A5) | ≥ 35% (Suitable for deep drawing and stamping) |
| Creep Fracture | Excellent stability below 800°C (non-load-bearing) |
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3. Advantages of GH3030 Alloy Material
High-Temperature Oxidation Resistance: Exhibits excellent oxidation resistance, up to 1100℃, suitable for high-temperature, low-load components.
Good Thermal Fatigue Performance: This material can withstand temperature cycling well, which is crucial for combustion chamber components.
Excellent Machinability: Exhibits high plasticity during both hot and cold working, making it easy to form, stamp, and machine.
Excellent Weldability: GH3030 has good weldability; various welding techniques can achieve good welds with minimal loss of mechanical properties, but specialized welding techniques are required.
Stable Microstructure: As a single-phase austenitic alloy, its microstructure remains stable during long-term use below 800℃.
4. Disadvantages of GH3030 Alloy
High Material Cost: As a nickel-based alloy, its manufacturing and raw material costs are relatively high.
Low High-Temperature Strength: Although it has oxidation resistance, its creep strength is relatively low above 800°C, therefore it is only suitable for light-load applications.
Machining Hardness/Brittleness: High hardness requires specialized tools and fine machining processes.
High Coefficient of Thermal Expansion: Not suitable for low-temperature environments because it is prone to deformation and cracking, therefore it is only suitable for high-temperature applications.
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5. Procurement Comparison: GH3030 vs. Inconel 625
| Feature | GH3030 (The Value Choice) | Inconel 625 (The Premium Choice) |
| Max Oxidation Temp | 800°C - 900°C | 980°C |
| Tensile Strength | Medium (685 MPa) | High (827 MPa) |
| Procurement Cost | Lower (Save 30-50%) | Higher |
| Lead Time | Short (Massive Stock) | Often Long |
| Verdict | Best for Burner/Furnace parts | Best for High-Pressure/Corrosive gas |
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FAQ
Q1: Can GH3030 replace Russian EI435 (ЭИ435)?
A: Yes. GH3030 was developed as a direct equivalent to EI435 / VZh98. It is a 1:1 technical replacement for Soviet-designed aviation and heating equipment, ensuring 100% compatibility.
Q2: Does your factory provide small-batch custom cutting?
A: Absolutely. As a customer-centric superalloy supplier, we offer precision saw cutting and laser cutting for small orders. We understand that R&D and MRO projects often don't need a full container of material.
Q3: What is the most common surface finish for export?
A: For tubes, Bright Annealed (BA) is popular for precision. For sheets and bars, Annealed & Pickled (AP) or Peeled surfaces are the industry standard, ensuring the material is scale-free and ready for fabrication.