Nimonic 75 (equivalent to GH3030) is a nickel-chromium-based superalloy, primarily strengthened by controlling the addition of titanium and carbon. It is a solid solution-strengthened material, renowned for its excellent oxidation resistance and structural stability at high temperatures.
Originally developed for the gas turbine industry, Nimonic 75 (GH3030) has become the global standard for components operating at temperatures up to 800°C (1472°F). Its unique combination of high-temperature strength and excellent machinability makes it one of the most widely used and cost-effective nickel-based alloys on the market today.
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What is Nimonic 75 (GH3030)?
What is Nimonic 75 (GH3030)?
Nimonic 75 (also known as GH3030 or UNS NO6075) is an 80/20 nickel-chromium superalloy with added titanium and carbon, designed for excellent oxidation resistance and moderate strength at temperatures up to 1000°C. Due to its good machinability, weldability, and corrosion resistance, it is widely used in the manufacture of sheet metal for gas turbines, furnace components, and aerospace fasteners.
What is Alloy 75?
Ni-Chromium Alloy
NIMONIC Alloy 75 (UNS N06075/W.Nr. 2.4951 & 2.4630) is an 80/20 nickel-chromium alloy with controlled amounts of titanium and carbon added.
1. GH3030 Chemical Analysis
Understanding the chemical composition of Nimonic 75 is crucial for engineering compliance. This alloy belongs to the Nimonic series and is characterized by its high chromium content.
| Element | Nickel (Ni) | Chromium (Cr) | Titanium (Ti) | Iron (Fe) | Carbon (C) |
| Percentage (%) | Balance | 19.0 - 22.0 | 0.2 - 0.6 | ≤ 5.0 | 0.08 - 0.15 |
2. Global equivalent grades for GH3030 alloy
| Country / Region | Standard | Equivalent Grade |
|---|---|---|
| China | GB/T 14992 | GH3030 |
| USA | ASTM B166 / B168 | UNS N06075 |
| Germany | DIN 17750 | Werkstoff Nr. 2.4951 |
| United Kingdom | BS HR5 / BS HR203 / BS HR403 | – |
3. GH3030 Main Mechanical Properties
| Key Mechanical Properties & Performance | Value / Description |
|---|---|
| Tensile Strength (Typical) | 650 - 800 MPa |
| Yield Strength (0.2% Offset) | ≥ 300 MPa |
| Elongation | ≥ 35% |
| Thermal Stability | Excellent creep strength below 800°C |
Fabrication: Superior cold-working and hot-working properties. It is highly valued for its superior welding performance, allowing for crack-free joints in complex assemblies.
Click to download the GH3030 alloy PDF file now
4. Applications of Nimonic 75
With its superior industrial durability, Nimonic 75 (GH3030) has become an essential material in several key sectors:
Gas Turbine Industry: Used for combustion chamber linings, flame tubes, exhaust pipes, and inner rings.
Heat Treatment Equipment: Furnaces, radiant tubes, heating elements, and conveyor belts.
Aerospace: High-temperature structural fasteners, heat shields, and engine housings.
Nuclear Engineering: Core structure supports and heat exchanger components with extremely low impurity requirements.
Why Choose Gnee Steel for Nimonic 75/GH3030?
Technical Support: Our engineers will assist you in selecting the right material to ensure you receive the most cost-effective heat treatment.
Quality Assurance: All materials come with a complete Level 3.1 factory test certificate (MTC) and ultrasonic testing report.
Wholesale Prices: As a direct supplier, we offer highly competitive prices for forged bars, plates, and seamless steel pipes.
Custom Processing: We provide precision cutting, bending, and professional heat treatment services.
Gnee Steel GH3030 Certificate
📦 Packaging and Shipping
All Nickel Based Alloy products are packaged using the following methods:
Wooden pallets or crates
Moisture-proof packaging
Labels with furnace number, standard, and size labels
Shipped worldwide by sea, air, or express
Contact us for the latest export price quote for GH3030 Alloy
FAQ
Q1: What are the key properties that make Nimonic 75 stand out?
A: Nimonic 75 is primarily known for its excellent creep strength below 800°C and its superior welding performance. Unlike some age-hardenable alloys, it maintains high ductility, making it much easier to fabricate into complex shapes like combustion cans.
Q2: Is Nimonic 75 the same as Inconel 600?
A: No. While both are nickel-chromium alloys, Nimonic 75 contains titanium and carbon specifically for high-temperature structural strength, whereas Inconel 600 is often used for its general corrosion resistance in chemical processing.
Q3: Can Nimonic 75 be used above 900°C?
A: While it has good oxidation resistance up to 1000°C, its mechanical strength decreases rapidly above 800°C. For load-bearing applications above 900°C, we recommend considering Nimonic 80A or Nimonic 90.
Q4: How does Nimonic 75 handle welding?
A: It is one of the easiest nickel alloys to weld. It can be joined using argon arc welding (TIG/MIG) or resistance welding without the risk of post-weld cracking.
