Are you facing difficulties sourcing XH78T (ХН78Т) or EI435 (ЭИ435) bars for gas turbine or aerospace engine maintenance, or experiencing excessively long delivery times? In the critical aerospace MRO field, finding a reliable alternative that strictly meets high-temperature performance standards is essential.
Gnee Steel, a leading high-temperature alloy supplier in China, offers high-purity GH3030 round bars (10mm–300mm in diameter) with performance fully consistent with XH78T. We are committed to bridging the gap between GOST and GB standards, providing global shipping and professional documentation services to ensure your maintenance projects proceed on schedule.
View the XH78T (ХН78Т) equivalence report
Equivalent Comparison of GH3030 and XH78T in the Aviation Field
Equivalent Comparison of GH3030 and XH78T in the Aviation Field
GH3030 and XH78T (often written as KhN78T) are actually the same nickel-chromium-based solid solution strengthened superalloy, widely used under GB and GOST standards respectively. They possess excellent oxidation resistance and thermal strength in the temperature range of 800°C to 1100°C.
What is GH3030 material?
GH3030 is a high-temperature nickel-based superalloy primarily used for components that require high oxidation resistance and thermal stability. It is commonly used in the aerospace and power generation industries due to its excellent performance in high-temperature environments.
1. Chemical composition of GH3030 round bars (weight %)
| Element | GH3030 (China) | XH78T / XH78T | Performance Role |
|---|---|---|---|
| Nickel (Ni) | Balance (~80.0%) | Balance (~75-78%) | Matrix Stability & Ductility |
| Chromium (Cr) | 19.0 - 22.0% | 17.0 - 20.0% | Oxidation Resistance up to 800°C |
| Titanium (Ti) | 0.15 - 0.35% | 0.20 - 0.50% | Carbide Stabilization |
| Iron (Fe) | ≤ 1.5% | ≤ 2.0% | Impurity Control |
2. Mechanical properties of XH78T bar (aviation standard)
| Property | GH3030 Bar | XH78T / XH78T Bar |
|---|---|---|
| Tensile Strength (σb) | ≥ 735 MPa | ≥ 690 MPa |
| Yield Strength (σ0.2) | ≥ 245 MPa | ≥ 250 MPa |
| Elongation (δ5) | ≥ 35% (Exceptional) | ≥ 35% |
| Weldability | Exceptional | Exceptional |
Click to download the GH3030 alloy PDF file now
3. Aerospace-Grade GH3030 High-Temperature Alloy Bar Sizes (10mm - 300mm)
As a professional factory direct supplier, Gnee Steel offers tailored bar stock solutions to meet the needs of various engine components:
Variety of Sizes: From 10mm precision bars for fasteners to 300mm forged bars for heavy-duty shafts.
Superior Surface Finishes: We offer bright polishing (h9/h10 tolerances) for precision machining and peeling finishes for forged billets.
High Plasticity: Our GH3030 retains the extremely high ductility required for hot forging and cold bending, ensuring zero-defect forming in your MRO workshop.
Welding Performance: Highly compatible with existing XH78T or EI435 structures, using standard TIG/MIG welding techniques-ideal for maintenance work.
Aerospace-grade GH3030 high-temperature alloy rod
4. Why Choose Gnee Steel?
As your reliable replacement parts supplier, Gnee Steel provides complete supply chain solutions for the global market:
MRO Supplier Qualification: We maintain a large inventory of standard sizes to handle emergency AOG (Aircraft Grounding) situations.
Factory Wholesale Prices: Purchase directly from the factory, eliminating the high markups of international trading companies.
Global Shipping Experts: We have extensive experience shipping to major industrial centers in the CIS region and handle all export and quality documentation (compliant with EN 10204 3.1 standards).
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
Gnee Steel GH3030 Product Packing
Contact us for the latest export price quote for GH3030 Alloy
FAQ
Q1: Can GH3030 truly replace XH78T (ХН78Т) in my engine maintenance?
A: Yes. GH3030 is a 1:1 Technical Equivalence to XH78T and EI435. It has been used successfully for decades as a drop-in replacement for combustion chamber liners, exhaust systems, and high-temp fasteners.
Q2: Do you provide Material Test Certificates (MTC) with GOST cross-references?
A: Every shipment is accompanied by a full Material Certification detailing the heat analysis and mechanical test data. We can provide cross-reference data for GOST 5632 to facilitate your local quality audits.
Q3: What is the typical lead time for Global Shipping to my region?
A: For items In Stock, we can ship within 3-7 days. For custom forged or rolled orders, the lead time is typically 20-30 days, ensuring your MRO Supply remains uninterrupted.
Q4: How do you handle the high-precision requirements for aerospace bolts?
A: We offer Bright Ground bars with h9 or h10 Precision Tolerance. These bars are CNC Ready, reducing your machining costs and ensuring a perfect fit for aviation-grade fasteners.
