The procurement of materials for critical aerospace components requires not only high-temperature resistance but also dimensional accuracy. We offer high-quality GH3030 nickel alloy bars manufactured using the H9 precision grinding process. These bars are specifically designed for direct CNC machining and can be used to manufacture engine shafts, support structures, and aerospace pins, ensuring a tight fit and extremely high fatigue resistance at temperatures up to 800°C.
High-quality GH3030 nickel alloy H9 precision grinding rods for aerospace components
High-quality GH3030 nickel alloy H9 precision grinding rods for aerospace components
GH3030 round bar (also known as XH78T) is a solid solution strengthened nickel-chromium based superalloy bar, renowned for its excellent oxidation resistance, high plasticity, and good thermal stability below 800℃, and can be used in special applications up to 1100℃. It is widely used in the aerospace and energy industries for manufacturing combustion chambers and related high-temperature components.
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. Key chemical equilibrium of GH3030 round bars (wt%)
| Ni | Cr | Ti | Mo | Fe | C |
| Balance (75%) | 19.0 - 22.0 | 0.15 - 0.35 | 1.5 - 3.0 | ≤ 1.50 | ≤ 0.12 |
2. Machining properties of GH3030 alloy bars
| Mechanical Properties for Machining | Value |
|---|---|
| Tensile Strength (Rm) | ≥ 685 MPa |
| Elongation (A5) | ≥ 35% |
| Hardness (HBW) | ≤ 200 (Annealed Condition – Perfect for Tool Longevity) |
Click to download the GH3030 alloy PDF file now
3. H9 Precision Grinding Surface
GH3030 bars offer high-precision surface finishes, such as H9 tolerances, achieved through centerless grinding or polishing. This indicates stringent diameter tolerance control, making them ideal for critical engineering applications requiring precise fits.
4. Advantages of H9 Precision Grinding
Why choose our precision ground bars instead of standard peeled bars?
Superior Tolerances: We offer ISO H8, H9, and H10 tolerance grades. No need for your own centerless grinding-our bars are ready for lathe machining.
Surface Finish: Ra ≤ 0.8μm. A mirror-smooth surface prevents stress concentration, thus improving the fatigue resistance of aerospace pins.
Straightness: We guarantee straightness < 0.5mm/m, which is crucial for high-speed automated CNC machining and effectively prevents vibration.
Click to learn about the production process of Gnee Steel GH3030 bars
5. Common Applications of GH3030 High-Temperature Alloy Bars
Aerospace: Turbine engine combustion chamber components.
Industrial Furnaces: High-temperature oxidation-resistant components.
Petrochemical/Nuclear Energy: Components requiring corrosion resistance in harsh environments.
6. Comparison of GH3030 and GH4169 (Inconel 718)
| Feature | GH3030 (Solid Solution) | GH4169 (Precipitation Hardened) |
| Machinability Rating | High (Easy on Carbide Tools) | Low (Extremely Hard/Abrasive) |
| Ductility (A5) | ≥ 35% (Exceptional) | ≥ 12% |
| Surface Finish | Easily achieves Ra 0.8 | Requires slow grinding |
| Best Application | Combustion components / Pins | Rotating Discs / Turbine Blades |
For non-load-bearing, high-temperature components, the GH3030 can double tool life and shorten machining cycles, thus providing a better return on investment.
Contact us now to get the latest export price for GH3030 in 2026
Stop paying exorbitant prices for Western brands. We can offer you the same aerospace-grade GH3030 superalloy Bar at a lower price. Our team is ready to provide you with a rapid quote (RFQ) within 12 hours.
Email: [ru@gneesteelgroup.com]
WhatsApp/WeChat: +86 15824687445
Website: [https://www.china-plate-steel.com/]
FAQ
Q1: What are the best cutting parameters for GH3030 bars?
A: Since GH3030 is a solid-solution strengthened alloy, it is less abrasive than GH4169. We recommend using carbide tools with a positive rake angle. For H9 ground bars, you can increase cutting speeds by 20% compared to standard hot-rolled rods due to the consistent diameter and lack of surface oxide.
Q2: Does your material comply with EI435 or Nimonic 75?
A: Yes. GH3030 is the direct equivalent of the Russian EI435 (ЭИ435) and British Nimonic 75. We provide full EN 10204 3.1 Mill Test Certificates (MTC) to ensure 100% compliance for international aerospace MRO projects.
Q3: What is the typical lead time for custom ground diameters?
A: We maintain a large inventory in stock for standard metric and imperial sizes. For custom grinding to specific tolerances (like h8), the lead time is usually 7-14 days, ensuring your production line never stops.