Are you looking for reliable XH78T (ХН78Т) or EI435 (ЭИ435) equivalent materials for gas turbine or aircraft engine maintenance? Gnee Steel, a leading MRO supplier and high-temperature alloy expert, offers aerospace-grade GH3030 seamless steel tubing that meets GB and stringent GOST standards.
Finding a reliable specialty nickel alloy supply chain can be complex. We provide high-purity, factory-direct GH3030 steel tubing with global shipping capabilities, simplifying your procurement process and ensuring your maintenance and production schedules run on time.
Click to get a quote for the GH3030, a product comparable to the XH78T
GH3030 and XH78T Seamless Steel Tubes: An Equivalence Guide for Aerospace Exhaust Systems
GH3030 and XH78T Seamless Steel Tubes: An Equivalence Guide for Aerospace Exhaust Systems
GH3030 and XH78T (HN78T) are nickel-based superalloy seamless steel tubes designed specifically for extreme aerospace exhaust systems and high-temperature combustion components. They possess excellent thermal strength and oxidation resistance, withstand temperatures up to 800-900°C and above, exhibit good ductility for easy machining, and possess a stable single-phase austenitic structure, providing critical structural stability for jet engines and turbines and effectively resisting thermal fatigue.
What are the components of GH3030?
GH3030 is a solid solution strengthened superalloy, primarily composed of nickel (Ni) and chromium (Cr), typically with 80% Ni and 20% Cr. This simple yet efficient alloy system provides excellent mechanical and chemical stability even under harsh conditions.
Chemical Composition of GH3030, XH78T Seamless Pipes
| Alloy Grade | C(max) | Si(max) | Mn(max) | P(max) | S(max) | Cr(max) | Ni | Al(max) | Ti | Fe(max) | Cu(max) |
| XH78T TU14-3-520-76 |
0.12 | 0.8 | 0.7 | 0.015 | 0.012 | 19-22 | Balance | 0.15 | 0.15-0.35 | 0.6 | 0.2 |
| GH3030 GB/T 15062-2008 |
0.12 | 0.8 | 0.7 | 0.03 | 0.020 | 19-22 | Balance | 0.15 | 0.15-0.35 | 1.5 | 0.2 |
Physicial Properties For GH3030 XH78T Seamless Pipes
| Density | g/cm3 | 8.4 |
| lb/in.3 | 0.303 | |
| Melting Range | °F | 2507 - 2588 |
| °C | 1374 - 1420 |
Mechanical Properties of GH3030 XH78T Seamless Pipes
| Alloy Grade | Tensile strength ó b/MPa | Yield strength ó 0.2/MPa | Elongation δ5% |
| XH78T TU 14-3-520-76 | 588 | 255 | 35% |
| GH3030 GB/T15062-2008 | 590 | - | 35 |
Comparing GH3030 and XH78T (ХН78Т)
While both alloys share the same 80% Nickel and 20% Chromium chemical base, our GH3030 is manufactured using modern precision techniques that often exceed legacy GOST requirements.
GH3030: The Modern High-Purity Standard
Melting Process: We utilize VIM (Vacuum Induction Melting) + ESR (Electroslag Remelting). This dual-refining process produces a "cleaner" alloy with significantly fewer inclusions than standard Russian melt grades, enhancing Thermal Fatigue Resistance.
VIM+ESR Process
Surface Finish: Available in Bright Annealed (BA) condition. This produces a mirror-like ID/OD surface that is essential for preventing carbon buildup in high-velocity exhaust gases.
Bright Annealed (BA) Seamless Tubes
Size Range: We specialize in the OD 6mm to 219mm range, offering Precision Tolerance through advanced cold-rolling processes.
XH78T (ХН78Т) / EI435: The Legacy Workhorse
Standard: Complies with GOST 5632. It is the traditional choice for Russian gas turbine combustion liners and burner parts.
Key Property: Known for its high plasticity and excellent weldability at 800°C, properties that our GH3030 matches exactly, making it a 1:1 Replacement Solution.
Gas turbine combustion chamber lining
GH3030 Manufacturing Capacity and MRO Supply Specifications
We understand that aerospace maintenance demands precise dimensions and proven reliability. As a leading manufacturer of aerospace-grade seamless steel tubing, Gnee Steel's product specifications include:
| Parameter | GH3030 / XH78T Capability |
| Manufacturing Process | Cold Drawn / Cold Rolled (Precision Controlled) |
| Outer Diameter (OD) | 6.0mm - 219.0mm (Perfect for MRO sizing) |
| Wall Thickness (WT) | 0.5mm - 20.0mm |
| Heat Treatment | Solution Treatment + Bright Annealing (BA) |
| Quality Testing | 100% Ultrasonic (UT) + Eddy Current (ECT) |
| International Export | Expert handling of customs & Global Shipping |
Why Choose Gnee as Your Nickel-Based Alloy Supplier
✅ Over 18 years of export experience, products sold to more than 80 countries
✅ Certified by ISO, SGS, and BV
✅ Global inventory of Inconel, Hastelloy, Incoloy, and Monel alloy tubing, plates, and bars
✅ Custom processing services available – including cutting, polishing, CNC machining, and packaging
✅ Fast delivery within 7-15 days, supported by global logistics partners
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 I use GH3030 to repair an engine originally designed for XH78T?
A: Yes. GH3030 is the designated Chinese equivalent to XH78T (ХН78Т) and EI435. It is a "drop-in" Replacement Solution with identical thermal expansion and oxidation resistance profiles up to 800°C.
Q2: Do you provide technical documentation in English or Russian?
A: Our standard documentation is in English. However, for our Reliable Supply Chain partners in the CIS, we can provide Russian-translated heat analysis and test reports to facilitate your local quality audits.
Q3: What is the benefit of the VIM+ESR process for XH78T-type pipes?
A: Standard GOST grades may have higher gas content. Our VIM+ESR refined GH3030 is exceptionally pure, reducing the risk of crack propagation during high-temperature cycles-this is a significant Material Upgrade for your equipment.
Q4: How do you handle Global Shipping to my region?
A: We have dedicated logistics partners specialized in Global Shipping of high-value alloys. We handle all export clearances and can offer CIF, DAP, or DDP terms depending on your location.
