GH3030 is a nickel-chromium based solid solution strengthened superalloy. Its core strength originates from its single-phase austenitic structure, which remains stable across a temperature range from low temperatures to its melting point.
GH3030 alloy exhibits excellent microstructural stability under thermal cycling conditions. This unique microstructure ensures its reliable performance in applications such as aero-engine components, industrial furnace structures, and high-temperature chemical equipment.
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GH3030 Material Properties: Physical, Mechanical and Thermal Properties
GH3030 Material Properties: Physical, Mechanical and Thermal Properties
GH3030 is a nickel-based solid solution strengthened superalloy (approximately 80Ni-20Cr) with high plasticity, good thermal strength, and excellent oxidation resistance (below 800℃ to 1100℃). It is widely used in the combustion chambers of aero-turbine engines and other high-temperature components that require high corrosion resistance but have low load-bearing capacity.
What is NIMONIC 75 material?
NIMONIC 75 alloy is an 80/20 nickel-chromium alloy with added titanium and carbon. This alloy was originally introduced in the 1940s for the manufacture of turbine blades. It is easy to machine and weld. This alloy has good corrosion resistance, mechanical properties, and heat resistance.
1. Chemical composition of GH3030 alloy
| Alloy | Grade | Fe (%) | Cr (%) | Ni (%) | C (%) | Mn (%) | Si (%) | S (%) | P (%) | Al (%) | Ti (%) |
|---|---|---|---|---|---|---|---|---|---|---|---|
| GH3030 | Min. | – | 19.00 | Balance | – | – | – | – | – | – | 0.15 |
| Max. | 1.50 | 22.00 | Balance | 0.12 | 0.70 | 0.80 | 0.020 | 0.030 | 0.15 | 0.35 |
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2. Physical Properties of GH3030
Accurate physical data is crucial for engineering calculations and design simulations. Our GH3030 material meets the highest industry standards of consistency.
| Property | Value | Notes |
| Density | 8.4 g/cm³ | High-density nickel base |
| Melting Range | 1374℃ - 1420℃ | Exceptional thermal resistance |
| Specific Heat Capacity | 460 J/(kg·℃) | At 20°C |
| Electrical Resistivity | 1.08 μΩ·m | Stable at high temperatures |
| Magnetic Properties | Non-magnetic | Ideal for sensitive electronic environments |
3. Mechanical properties of GH3030 (at room temperature)
As a leading high-performance alloy, GH3030 offers a superior balance of strength and ductility, allowing for complex forming without sacrificing integrity.
Tensile Strength (σb/Rm): ≥ 590 MPa
Yield Strength (σp0.2/Rp0.2): ≥ 245 MPa
Elongation (δ5/A): ≥ 35%
Hardness (HB): 130 - 180 (Solution treated state)
4. Thermal Properties and Oxidation Resistance of High-Temperature Alloy GH3030
The main characteristic of GH3030 lies in its performance at high temperatures.
Maximum operating temperature: 800°C (continuous); up to 1000°C (short-term/low load).
Oxidation resistance: Forms a tightly adhering Cr₂O₃ protective layer, effectively resisting scaling in air and oxidizing atmospheres.
Coefficient of thermal expansion: Optimized design minimizes stress during rapid heating and cooling cycles, thus maintaining structural stability.
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5. Machining Properties of Alloy GH3030
Welding: Excellent weldability can be achieved using TIG welding, MIG welding, and spot welding. Standard applications typically require no preheating or post-weld heat treatment.
Forming: Excellent cold working properties enable deep drawing and spinning, allowing for the manufacture of complex combustion chamber liners.
Machining: Similar to austenitic stainless steel, but lower cutting speeds and carbide tools are recommended for optimal surface finish.
Why Choose Our GH3030 Material?
Data-Driven Quality Assurance: We provide complete technical data sheets for every batch of product, along with laboratory test results.
High-Purity Melting: Utilizing vacuum induction melting (VIM) technology, we ensure extremely low trace element content and exceptionally high performance reliability.
Certified Supply: Our GH3030 complies with ISO, ASTM, and GB standards, making us the preferred partner for the global aerospace and energy industries.
Gnee Steel GH3030 certificate
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FAQ
Q1: How does the "single-phase austenite" structure benefit my project?
A: It means the material does not undergo phase transformation during heating and cooling, which prevents internal stress and distortion, ensuring the long-term structural stability of your components.
Q2: Is GH3030 suitable for use in sulfur-containing environments?
A: GH3030 has moderate resistance to sulfur. For high-concentration sulfur environments at extreme temperatures, please contact our technical team for a more specialized alloy recommendation.
Q3: Does the tensile strength stay constant at high temperatures?
A: Like all alloys, strength decreases as temperature rises. However, GH3030 maintains sufficient mechanical integrity for structural roles up to 800°C. We can provide a "Temperature vs. Strength" chart upon request.
