For engineering companies in the Middle East and Russia, many long-standing, high-risk blueprints specify the use of Russian standard materials such as XH78T (EI435) or EI435. When these materials are difficult to source globally, a major pain point in procurement lies in compliance verification:
Is the Chinese-made GH3030 technically equivalent to XH78T?
Does the material meet the chemical purity requirements of the original Soviet-era designs?
Will the change in material name affect certification for aerospace or furnace component projects?
At Gnee Alloy, we are dedicated to solving this problem. GH3030 is specifically developed based on the Russian standard material XH78T (EI435). Both alloys follow the same metallurgical principles, ensuring industrial durability and structural integrity under extreme high-temperature environments.
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GH3030 XH78T High Temperature Nickel Alloy Performance Guide
GH3030 XH78T High Temperature Nickel Alloy Performance Guide
GH3030 (Russian equivalent alloy: XH78T) is an 80Ni-20Cr solid solution strengthened nickel-chromium alloy. It is highly regarded for its excellent thermal stability, outstanding oxidation resistance up to 1100℃, and excellent machinability.
What is GH3030 material?
GH3030 is a high-temperature nickel-based superalloy primarily used in components requiring high oxidation resistance and thermal stability. Due to its excellent performance in high-temperature environments, GH3030 is widely used in the aerospace and power generation industries.
1. GH3030 Global Equivalent Standard
| Region | Standard / Designation | Technical Status |
| Russia (GOST) | XH78T / EI435 (ЭИ435) | Direct Parent Grade |
| China (GB) | GH3030 / GH30 | Certified Technical Match |
| USA / UK | Nimonic 75 / UNS N06075 | Closest Global Equivalent |
| Europe (EN) | W.Nr. 2.4951 / NiCr20Ti | Industrial Equivalent |
2. Comparison of chemical composition of GH3030 alloy (%)
| Element | GH3030 (China) | XH78T / EI435 (Russia) | Role in the Alloy |
| Nickel (Ni) | Balance (~75%) | Balance (~75%) | Base for stability. |
| Chromium (Cr) | 19.0 - 22.0 | 19.0 - 22.0 | Oxidation resistance. |
| Titanium (Ti) | 0.15 - 0.35 | 0.15 - 0.35 | Grain stabilizer. |
| Iron (Fe) | ≤ 1.50 | ≤ 1.00 | Trace control. |
| Carbon (C) | ≤ 0.12 | ≤ 0.12 | Matrix hardening. |
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3. Mechanical properties of GH3030 alloy at 800°C (1472°F)
Our GH3030 material is refined via VIM + ESR to ensure internal integrity that meets or exceeds original Russian specifications.
| Property | Value |
|---|---|
| Tensile Strength (σb) | ≥ 140 MPa |
| Yield Strength (σp0.2) | ≥ 100 MPa |
| Elongation (δ5) | ≥ 50% |
| Melting Range | 1374°C – 1420°C (Stable thermal envelope) |
4. GH3030 Key Performance Characteristics
Operating Temperature: Reliable thermal strength and high plasticity below 800℃. Withstands oxidation up to 1100℃ under low load conditions.
Microstructure: Retains single-phase austenitic structure after solution treatment, ensuring high structural stability during long-term use and preventing the precipitation of harmful phases.
Corrosion Resistance: Extremely strong resistance to atmospheric oxidation, thermal fatigue, and various chemical corrosions.
Processing Performance: Excellent cold/hot working, stamping, and welding properties.
5. Physical and thermal properties of GH3030 alloy
| Property | Value |
|---|---|
| Density | 8.4 g/cm³ |
| Melting Point Range | 1374 – 1420°C |
| Specific Heat Capacity | 775 J/kg·°C (room temperature) |
| Thermal Conductivity | 13 W/m·°C |
6. GH3030 Alloy Working & Processing Parameters
| Parameter | Value / Recommendation |
|---|---|
| Forging Heating Temperature | 1180°C |
| Final Forging Temperature | 900°C |
| Solution Heat Treatment | 980 – 1100°C (usually followed by rapid air cooling or water cooling) |
| Welding | Easy to weld, but usually requires preheating to 200 – 300°C and post-weld annealing |
7. Common Applications of GH3030/XH78T
Due to its reliability in extreme environments, GH3030/XH78T is widely used in:
Aerospace: Gas turbine combustor components, combustors, afterburners, and casing mounting edges.
Industrial and Chemical: Heat exchangers, reactors, and chemical processing equipment.
Electronics: High-temperature resistors and thermocouples.
Welding: Widely used as a specialized welding wire for joining nickel alloys and carbon/stainless steel.
Why Choose Gnee as Your Nickel-Based Alloy Supplier
As a Tier 1 manufacturer, Gnee Alloy offers more than just raw materials; we also provide engineering support.
✅️Russian Blueprint Expertise: Our technical team is experienced in interpreting original Soviet-era drawings and ensuring material compliance.
✅️MTC 3.1 Traceability: Full EN 10204 3.1 documentation included, ensuring your project passes all technical audits.
✅️Wholesale Inventory: Massive stock of Seamless Tubes, Round Bars, and Sheets ready for Fast Global Shipping.
✅️Custom Fabrication: We offer precision cutting and specialized thermal treatment to match your assembly blueprints.
Gnee Alloy 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
Gnee Alloy GH3030 Product Packing
Contact us for the latest export price quote for GH3030 Alloy
FAQ
Q1: Can GH3030 be used as a direct replacement for EI435 in aero-engine liners?
A: Yes. GH3030 is the designated equivalent for EI435/XH78T. It offers the same high-temperature oxidation resistance and plasticity required for complex aerospace sheet metal fabrication.
Q2: Is GH3030 also equivalent to Nimonic 75?
A: Yes. In the international market, Nimonic 75 is the closest equivalent to both GH3030 and EI435. They share the same 80/20 Ni-Cr base with Ti stabilization.
Q3: Does the material meet nuclear safety standards?
A: Absolutely. Our VIM-melted materials are engineered for ultra-low impurities, making them suitable for structural members in high-temperature reactors.
Q4: How do you handle shipping to the Middle East or Eastern Europe?
A: We provide specialized export packaging and work with global logistics partners to ensure your High-Performance Alloy arrives safely, with all necessary customs documentation (COO, CI, PL) provided.
