Material selection is critical when manufacturing high-integrity aerospace bolts, pins, and rivets. Our GH3030 high-temperature alloy bars (equivalent to Nimonic 75/EI435) are designed specifically for the aerospace fastener industry. These bars meet AMS 5662 equivalent standards, perfectly balancing high plasticity and thermal stability to meet the requirements of critical jet engine and gas turbine assemblies.
Get wholesale quotes within 12 hours
AMS 5662 GH3030 / Nimonic 75 high-temperature alloy bars for aerospace fasteners
AMS 5662 GH3030 / Nimonic 75 high-temperature alloy bars for aerospace fasteners
Nimonic 75 bar (UNS N06075 / W.Nr. 2.4951 or 2.4630) is a nickel-chromium alloy bar stock, similar to the Chinese grade GH3030. It is characterized by excellent oxidation resistance and high-temperature creep resistance, making it suitable for aerospace fasteners, gas turbine combustion chambers, and hot-working tools. It is widely used in components operating at temperatures up to 800°C (up to 1100°C in some applications) with moderate strength requirements.
What is NIMONIC 75 material?
NIMONIC 75 alloy bar is an 80/20 nickel-chromium alloy bar 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, and has good corrosion resistance, mechanical properties, and heat resistance.
GH3030 Round Bar Performance Composition
The production of aerospace fasteners involves severe deformation. Ordinary alloys often suffer from surface cracks or internal inclusions. Our GH3030 bars, however, perfectly solve these problems thanks to their superior metallurgical properties.
1. Core chemical composition of GH3030 round bars
| Element | Ni | Cr | Ti | Fe | Impurity Control |
| Percentage | Balance (75%) | 19.0 - 22.0 | 0.15 - 0.35 | ≤ 1.50 | Ultra-Low S, P, O |
2. Key Mechanical Properties of GH3030 Bars
| Critical Mechanical Performance | Value |
|---|---|
| Tensile Strength (Rm) | ≥ 685 MPa (Maintains strength at 800°C) |
| Yield Strength (Rp 0.2) | ≥ 275 MPa |
| Elongation (A5) | ≥ 35% (Excellent for cold-heading and complex thread rolling) |
Click to download the GH3030 alloy PDF file now
3. Aerospace Fasteners Application
High-Temperature Strength: These alloys maintain structural integrity under high pressure and heat, making them ideal for fasteners in gas turbine engines.
Material Forms: Available in bars, round bars, and flat bars, and can be machined into various specialized fasteners.
Usage Context: Often used in components that require long-term stability and resistance to scaling (e.g., in turbine engines and nuclear engineering).
4. Comparison of GH3030 with other nickel alloys
| Feature | GH3030 (Our Grade) | Inconel 600 | 316 Stainless Steel |
| Service Temp | Up to 800°C | Up to 700°C | Up to 600°C |
| Fabrication | Excellent Cold/Hot Heading | High Work Hardening | Prone to Galling |
| Stability | Fine Grain (VIM+ESR) | Standard Purity | Low Creep Strength |
| Application | Jet Engine Combustion Bolts | Heat Exchangers | General Marine |
Contact our professionals to recommend alloys suitable for your project
5. Gnee Steel's VIM + ESR Dual Melting Process
As a professional superalloy manufacturer, Gnee Steel understands that "zero internal defects" is the standard in the aerospace industry.
Vacuum Induction Melting (VIM): Eliminates harmful dissolved gases (H, O, N), preventing oxidation.
Electroslag Remelting (ESR): Removes non-metallic inclusions, ensuring a homogeneous microstructure, which is crucial for the fatigue resistance of high-speed turbine pins.
Precision Surface Finishing: We offer bright-polished (h9 tolerance) or peeled bars, ready for direct use in high-speed CNC machining and automatic thread rolling.
VIM+ESR process
Contact us now to get the latest export price for GH3030 in 2026
Contact us for a quote on high-performance GH3030 Bar!
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: Is GH3030 suitable for cold-heading (Cold Forming)?
A: Absolutely. GH3030 is one of the most ductile nickel-based superalloys. With an elongation exceeding 35%, it allows for high-strain deformation without the risk of surface cracking, which is a major pain point for manufacturers using harder alloys like GH4169.
Q2: Does your material comply with AMS 5662?
A: While GH3030 is a GB/GOST standard (equivalent to Nimonic 75), its chemical and mechanical properties are fully aligned with the requirements of AMS 5662 equivalent applications. We provide full EN 10204 3.1 Mill Test Certificates (MTC) to ensure 100% traceability for aerospace audits.
Q3: What is the benefit of the Titanium (Ti) addition in GH3030?
A: The precise control of Titanium (0.15-0.35%) helps in grain refinement. This prevents grain coarsening during high-temperature service, ensuring that your bolts and pins won't become brittle after thousands of hours in a jet engine.