GH3030 High Temp Alloys Pipe
As a leading supplier and manufacturer in China, GNEE Steel provides cost-effective nickel-based alloy products.
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Gnee Super Alloy (Tianjin) Co., Ltd. is one of the most professional manufacturers and suppliers of gh3030 high temp alloys pipe in China. If you're going to wholesale high quality gh3030 high temp alloys pipe made in China, welcome to get free sample from our factory. Good service and reasonable price are available.
GH3030 round Pipe description
GNEE High Temperature Alloy GH3030 Pipe
In high-temperature industrial environments, selecting the right piping requires a balance between thermal performance and cost-effectiveness. GH3030 high-temperature alloy tubing is an industry standard suitable for applications requiring reliable structural integrity below 800°C (1472°F).
GH3030 is a single-phase austenitic nickel-based superalloy (equivalent to Nimonic 75) renowned for its superior oxidation resistance, high ductility, and excellent weldability. Whether you are building aerospace combustion chambers or industrial heating systems, our GH3030 tubing provides the necessary industrial durability to prevent costly downtime and material failure.
Do you need steel pipes with specific wall thickness or length? Gnee Steel offers custom-cut GH3030 seamless steel pipes with short lead times.
Get a free quote within 24 hours
GH3030 Seamless Pipe Equivalent Grade
| Region | Standard / Equivalent Grade |
|---|---|
| USA | UNS N06075 / Alloy 75 |
| Europe | Nimonic 75 / W.Nr. 2.4951 |
| UK | BS HR5 / HR203 / HR403 |
Alloy 75 Seamless Pipe Specification
| Feature | GH3030 (Nickel Alloy 75) Details |
| Manufacturing Type | Seamless (Cold Drawn / Cold Rolled) |
| Outside Diameter (OD) | 6mm – 426mm (Standard & Non-Standard) |
| Wall Thickness (WT) | 0.5mm – 35mm (Sch 10, Sch 40, Sch 80, XXS) |
| Max Service Temp | 800°C (Continuous); 1000°C (Intermittent) |
| Standard Compliance | GB/T 15062, ASTM B167, BS HR5, DIN 17751 |
| Certification | Mill Test Certificate (MTC) 3.1 / 3.2 |
Get a Formal Quote for Bulk GH3030 Seamless Pipes
Nimonic 75 seamless pipe Specification
GH3030 Tubing Chemical Composition
| Alloy Grade | Ni | Cr | Ti | Fe | C | P/S |
| GH3030 | Balance | 19-22% | 0.15-0.35% | ≤ 1.50% | ≤ 0.12% | ≤ 0.010% |
GH3030 / XH78T tubing Physical Properties
| Property | Value |
|---|---|
| Density | 8.4 g/cm³ |
| Melting Range | 1374 – 1420°C |
| Thermal Conductivity (20°C) | ~14 – 15 W/m·K |
| Coefficient of Thermal Expansion (20-100°C) | 12.8 × 10⁻⁶/°C |
| Coefficient of Thermal Expansion (20-500°C) | ~14.0 × 10⁻⁶/°C |
| Coefficient of Thermal Expansion (20-800°C) | ~16.0 × 10⁻⁶/°C |
| Specific Heat (20°C) | ~460 – 500 J/kg·K |
| Electrical Resistivity (20°C) | ~1.20 – 1.30 µΩ·m |
| Magnetic Properties | Non-magnetic |
Click to download the GH3030 alloy PDF file now
GH3030 (Nimonic 75) Seamless Steel Pipe Dimensions and Specifications
As a leading manufacturer of GH3030 high-temperature alloy tubing, Gnee Steel maintains a large inventory of standard sizes for immediate shipment. We also offer custom machining services to meet the needs of non-standard wall thicknesses and large diameters.
1. Common industrial sizes (metric and imperial) for high-temperature alloy GH3030 tubes
| Outer Diameter (OD) - mm | OD (Inch) | Wall Thickness (WT) - mm | Typical Schedule (ANSI) |
| 6.0 mm | 0.236" | 0.5 mm - 1.5 mm | Instrumentation Tube |
| 10.0 mm | 0.394" | 1.0 mm - 2.0 mm | Precision Tubing |
| 13.72 mm | 1/4" NPS | 1.65 mm / 2.24 mm | Sch 10S / Sch 40S |
| 17.15 mm | 3/8" NPS | 1.65 mm / 2.31 mm | Sch 10S / Sch 40S |
| 21.34 mm | 1/2" NPS | 2.11 mm / 2.77 mm / 3.73 mm | Sch 10S / 40S / 80S |
| 26.67 mm | 3/4" NPS | 2.11 mm / 2.87 mm / 3.91 mm | Sch 10S / 40S / 80S |
| 33.40 mm | 1" NPS | 2.77 mm / 3.38 mm / 4.55 mm | Sch 10S / 40S / 80S |
| 42.16 mm | 1-1/4" NPS | 2.77 mm / 3.56 mm / 4.85 mm | Sch 10S / 40S / 80S |
| 48.26 mm | 1-1/2" NPS | 2.77 mm / 3.68 mm / 5.08 mm | Sch 10S / 40S / 80S |
| 60.33 mm | 2" NPS | 2.77 mm / 3.91 mm / 5.54 mm | Sch 10S / 40S / 80S |
| 88.90 mm | 3" NPS | 3.05 mm / 5.49 mm / 7.62 mm | Sch 10S / 40S / 80S |
| 114.30 mm | 4" NPS | 3.05 mm / 6.02 mm / 8.56 mm | Sch 10S / 40S / 80S |
| 168.28 mm | 6" NPS | 3.40 mm / 7.11 mm / 10.97 mm | Sch 10S / 40S / 80S |
| 219.08 mm | 8" NPS | 3.76 mm / 8.18 mm / 12.70 mm | Sch 10S / 40S / 80S |
| 273.05 mm | 10" NPS | 4.19 mm / 9.27 mm / 15.09 mm | Sch 10S / 40S / 80S |
| 323.85 mm | 12" NPS | 4.57 mm / 9.53 mm / 17.48 mm | Sch 10S / 40S / 80S |
2. Manufacturing capacity for GH3030 thick-walled large-diameter pipes
For high-pressure reactors and heavy-duty structural applications, we provide custom-pierced and cold-drawn solutions:
Maximum Outer Diameter: Up to 426 mm (16" NPS) for seamless pipes.
Heavy Wall Thickness: Up to 35 mm (XXS) for extreme high-pressure service.
Length: Standard 6000mm (20ft) or Fixed Length custom cutting.
Tolerance: Compliant with ASTM A999 or specialized h8-h11 requirements for bright tubes.
Click to contact us for customized pipe size solutions
Products and services offered by Gnee Steel
Main Applications of GH3030 Steel Pipe
Our Heavy-Duty GH3030 pipes are the preferred choice for global Tier-1 companies in:
Aerospace Propulsion: Combustion liners, flame tubes, and exhaust manifolds.
Industrial Heating: Radiant tubes, furnace muffles, and conveyor rollers.
Petrochemical Processing: Reactor internals and high-temperature heat exchangers.
Power Generation: Superheater support tubes and sensor protection sleeves.
GH3030 Pipe Supplier
Sensor protective sleeves
GH3030 Tube Factory
Packaging method for Alloy 400 Pipe
Gnee Steel uses the safest and most effective packaging methods for all types of cargo transportation. Our packaging methods include:
Wooden crates
Wooden pallets
Shrink wrap packaging
Cardboard boxes
Wooden crates (slatted)
GH3030 pipe quality assurance: 100% performance testing
As a reliable supplier, Gnee Steel guarantees the quality of every GH3030 pipe through the following methods:
Non-Destructive Testing (NDT): 100% Ultrasonic (UT) and Eddy Current (ET) testing.
Hydrostatic Testing: Ensuring leak-free performance in high-pressure environments.
Metallurgical Analysis: Verifying grain size and carbide distribution.
High-Temp Tensile Testing: Ensuring the material meets spec at 800°C.
Why Specify Our GH3030 High Temp Alloys Pipe?
1. Exceptional Oxidation Resistance at Scale
Our GH3030 pipes are rich in Chromium (19-22%), allowing them to form a dense, adherent Cr2O3 protective layer. This self-healing oxide scale prevents deep metal loss even during rapid thermal cycling, ensuring your system remains clean and efficient.
2. VIM + ESR High-Purity Melting
We eliminate the risk of welding cracks and material impurities through our advanced Vacuum Induction Melting (VIM) + Electroslag Remelting (ESR) process. This ensures ultra-low sulfur and phosphorus (≤0.010%), providing the cleanest microstructure for Aerospace Grade applications.
3. Seamless Structural Integrity
Our seamless high temp alloy pipes are cold-drawn and solution-treated to ensure uniform grain size. This results in superior creep strength and fatigue resistance compared to commercial-grade alternatives.
GH3030 Pipe Certificate
Please contact us to get a quick quote for the Alloy GH3030 Pipe you need
We supply these GH3030 Pipe and tubes according to DIN, ISO, JIS, or ANSI/ASME standards.
FAQ
Q1: What is the main difference between GH3030 and GH3039 pipes?
A: GH3030 is a solid-solution alloy best for applications under 800°C requiring excellent welding and ductility. GH3039 adds Molybdenum and Niobium for higher creep strength above 850°C. For most industrial furnace parts, GH3030 is the most Cost-effective Solution.
Q2: Can you provide non-standard large-diameter pipes?
A: Yes! While many suppliers stop at 219mm, we can provide seamless pipes up to 426mm and custom welded pipes up to 1200mm for low-pressure exhaust systems.
Q3: How do you prevent corrosion in sulfur-containing gases?
A: GH3030 is optimized for oxidizing atmospheres. If sulfur is present, we recommend keeping service temperatures below 600°C. For extreme sulfur environments, contact our engineers for a custom coating or alloy recommendation.
Q4: Do you offer bulk discounts for major projects?
A: Absolutely. As a Direct Factory Manufacturer, we offer tiered Wholesale Pricing and dedicated project management for bulk procurement.
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