Are you looking for a direct manufacturer that understands the demanding metallurgical requirements of high-temperature piping? Gnee Steel, a leading manufacturer of the nickel-based superalloy GH3030, focuses on producing high-purity seamless steel pipes designed for the world's most demanding aerospace and industrial furnace environments.
Our GH3030 steel pipes (fully equivalent to Nimonic 75 and XH78T) are designed to maintain structural integrity and superior oxidation resistance under continuous use conditions up to 800°C.
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GH3030 (Nimonic 75) Superalloy Pipe Manufacturer | High-Temp Solutions
GH3030 (Nimonic 75) Superalloy Pipe Manufacturer | High-Temp Solutions
GH3030 (with performance comparable to Nimonic 75) is an 80Ni-20Cr solution-strengthened superalloy designed for high-temperature environments up to 1100°C, exhibiting excellent oxidation resistance and good weldability. As a preferred material for jet engine components, gas turbines, and petrochemical furnace components, it provides structural stability and corrosion resistance at high temperatures.
What are the components of NIMONIC 75?
Nimonic 75 (UNS N06075) is an 80/20 nickel-chromium alloy. Its main component is nickel, with a chromium content of 18.0%–21.0%, and small amounts of titanium and carbon. It possesses excellent oxidation resistance and high-temperature strength, and is commonly used in gas turbines and furnace components. It also contains small amounts of iron, silicon, and manganese.
| Nickel GH3030 Superalloy Pipe GH3030 High Temperature Alloy Tube | |
| Outside Diameter | 10.3-426mm |
| Wall Thickness | 1.24-40.49mm |
| Length | Up to 25m |
| Standard | ASTM B163, ASTM B167, ASTM B407, ASTM B444, ASTM B622, ASTM B677, ASTM B829,etc. |
| High Temperature Alloys | GH2132,GH3030,GH3039,GH3128,GH3044,GH4080A. |
| Delivery Condition | Pickled&Annealed, Polished, Bright Annealed. |
| Technique | Seamless |
| Marking | LOGO, Standard, Grade, Size, Heat Number. |
| Package | Woven bag, wooden cases, or as per customer's requirement. |
| Quality Requirement | Mill Test Certificate (EN 10204/3.1); Third Part Inspection is acceptable. |
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 |
Precision Manufacturing: From VIM+ESR to Your Facility
Quality in superalloys starts at the molecular level. Unlike standard commercial tubing, our GH3030 pipes are manufactured using a dual-refining process to ensure Premium Quality and high-purity performance:
Vacuum Induction Melting (VIM) + Electroslag Remelting (ESR): This combination removes trace impurities and gases, resulting in a dense, uniform grain structure that prevents premature failure in high-stress thermal cycles.
VIM+ESR Process
Advanced Cold Rolling & Cold Drawing: Our precision processing ensures that every Seamless Tube meets strict dimensional tolerances and possesses superior mechanical properties.
Bright Annealing (BA) Surface Treatment: We utilize controlled-atmosphere heat treatment to produce a scale-free, mirror-like finish on both the inner and outer walls. This is critical for high-purity gas flow and preventing localized corrosion.
GH3030 High Temperature Alloy Tube Technical Specifications and Optional Sizes
| Specification | Details |
|---|---|
| Outside Diameter (OD) | 6.0mm - 219mm (Precision tolerances up to ±0.05mm) |
| Wall Thickness (WT) | 0.5mm - 20.0mm |
| Length | Random lengths up to 12 meters or fixed-cut precision lengths |
| Surface Condition | Bright Annealed (BA) for high-purity apps or Annealed & Pickled (AP) for structural furnace parts |
| Standard Compliance | ASTM B167, GB/T 15062, AMS 5580 |
GH3030 Pipe Specialized Applications
Our GH3030 pipe is a mainstay in the high-temperature solutions industry, primarily used in:
Aerospace Propulsion Systems: Aircraft engine combustion chamber liners and afterburner fuel manifolds.
Industrial Heat Treatment: Furnaces, radiant tubes, and conveyor rollers.
Chemical and Energy: High-temperature, oxidation-resistant piping for petrochemical reactors.
MRO Supply: Equivalent products for XH78T (ХН78Т) and EI435 maintenance projects, available for immediate shipment.
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: What is the benefit of the Bright Annealed (BA) finish for GH3030 pipes?
A: The BA finish ensures a clean, smooth, and oxide-free surface. In aerospace fuel lines or high-purity gas systems, this prevents turbulence and eliminates the risk of scale particles breaking off and damaging downstream components.
Q2: Can GH3030 pipes be easily welded?
A: Yes. GH3030 is renowned for its excellent weldability. It is highly compatible with argon arc welding (TIG/MIG) and resistance welding, making it an ideal material for complex fabricated furnace internals.
Q3: What is the maximum operating temperature for this alloy?
A: GH3030 maintains its mechanical stability and oxidation resistance up to 800°C (1472°F). For applications requiring strength above 900°C, we recommend consulting our team about GH3044 or Inconel 617.
Q4: How do you ensure the internal quality of the seamless tube?
A: Every tube undergoes 100% Non-Destructive Testing (NDT), including Ultrasonic and Eddy Current testing, to ensure it is free from internal cracks, laminations, or defects.
