GH3030 Pipe
As a leading supplier and manufacturer in China, GNEE Steel provides cost-effective nickel-based alloy products.
- Send E-mail: ss@gneesteel.com
- Tel: +8615824687445
GH3030 Pipe description
GNEE GH3030 Pipe
GH3030 is a nickel-chromium-based solid solution strengthened superalloy designed for applications requiring excellent oxidation resistance and structural integrity at high temperatures. GH3030 steel pipe is internationally recognized as an equivalent to Nimonic 75, maintaining excellent mechanical properties in oxidizing atmospheres at temperatures up to 800°C (continuous) and 1000°C (short-term).
Gnee Steel, a professional manufacturer of superalloys, offers GH3030 steel pipe with an optimized grain structure, ensuring optimal performance in combustion chambers, heat exchangers, and furnaces.
Looking for a reliable supply chain partner? We offer tiered wholesale pricing for GH3030 pipe orders.
Get a quote for GH3030 pipe now
| EQUIVALENT GRADES OF High Temperature Gh3030: |
| China | Russia |
| GH3030 | XH78T |
Dimensions & Available Size Range
We specialize in Precision Cold Drawn & Bright Annealed tubing with tight tolerances.
Outside Diameter (OD): 6.0 mm – 219.0 mm
Wall Thickness (WT): 0.5 mm – 20.0 mm
Length: Standard 6m or Precision Cut-to-Length (±1mm).
Surface Finish: Bright Annealed (BA), Pickled, or Polished (to your Ra requirements).
Alloy GH3030 Pipe Specifications
| Specifications of High Temperature Gh3030 PIPES / TUBE: |
| Grade | High Temperature Gh3030 |
| Range | 1/2″ Nominal Bore To 16″Nominal Bore |
| Length | Single Random, Double Random & Cut Length. |
| Finish | Hot rolled plate (HR), Cold rolled sheet (CR), 2B, 2D, BA NO(8), SATIN (Met with Plastic Coated) |
| Form | Round, Square, Rectangular, Hydraulic Etc |
| Type | Seamless / ERW / Welded / Fabricated / EFW |
GH3030 pipe Seamless Pipe Specification
Chemical composition (%) of GH3030 pipe
Our GH3030 strictly complies with GB/T 15062 and aerospace-grade standards.
| Element | Ni | Cr | Ti | Al | Fe | C | Mn | Si | P | S |
| Min | Bal | 19.00 | 0.15 | - | - | - | - | - | - | - |
| Max | Bal | 22.00 | 0.35 | 0.15 | 1.50 | 0.12 | 0.70 | 0.80 | 0.015 | 0.010 |
Mechanical properties of GH3030 pipe (at room temperature)
| Property | Value |
|---|---|
| Tensile Strength (Rm) | ≥ 590 MPa |
| Yield Strength (Rp0.2) | ≥ 245 MPa |
| Elongation (A5) | ≥ 35% |
| Hardness | ≤ 200 HBW |
GH3030 Pipe - Physical Properties
| Physical Property | Value |
|---|---|
| Density | 8.4 g/cm³ |
| Melting Range | 1374°C - 1420°C |
| Specific Heat (20-100°C) | 440 J/(kg·K) |
GH3030 Seamless Tube: Size & Theoretical Weight Chart
The theoretical weight is calculated based on the GH3030 density of 8.4 g/cm³.
Formula: Weight ( kg/m ) = (OD - WT) × WT × 0.02638
| Outside Diameter (OD) | Wall Thickness (WT) | Theoretical Weight ( kg/m ) | Common Processing |
| 6.0 mm | 1.0 mm | 0.132 kg | Cold Drawn / Capillary |
| 10.0 mm | 1.5 mm | 0.336 kg | Cold Drawn |
| 18.0 mm | 2.0 mm | 0.844 kg | Cold Drawn / BA |
| 25.0 mm | 2.5 mm | 1.484 kg | Cold Drawn |
| 38.0 mm | 3.0 mm | 2.770 kg | Cold Drawn / Hot Rolled |
| 57.0 mm | 3.5 mm | 4.945 kg | Hot Rolled / Pickled |
| 76.0 mm | 4.0 mm | 7.597 kg | Hot Rolled |
| 108.0 mm | 5.0 mm | 13.586 kg | Hot Rolled / Forged |
| 219.0 mm | 8.0 mm | 44.530 kg | Forged & Machined |
2. GH3030 Estimated Allowable Pressure Rating Table
The pressure ratings are calculated using the Barlow formula and include a standard safety factor. As high-temperature experts, Gnee Steel notes that the permissible pressure decreases significantly as operating temperatures increase.
Reference Material: Annealed GH3030 Seamless Tube
| OD x WT (mm) | at 20°C (MPa) | at 600°C (MPa) | at 800°C (MPa) |
| 10 x 1.0 | 25.5 MPa | 17.8 MPa | 8.2 MPa |
| 18 x 1.5 | 21.2 MPa | 14.8 MPa | 6.8 MPa |
| 25 x 2.0 | 20.4 MPa | 14.2 MPa | 6.5 MPa |
| 38 x 3.0 | 20.0 MPa | 14.0 MPa | 6.4 MPa |
| 57 x 4.0 | 17.9 MPa | 12.5 MPa | 5.7 MPa |
| 76 x 5.0 | 16.7 MPa | 11.6 MPa | 5.3 MPa |
| 108 x 6.0 | 14.2 MPa | 9.9 MPa | 4.5 MPa |
Disclaimer: These figures are for engineering reference only. Actual pressure limits must take into account corrosion allowances and specific safety standards (ASME, GB, or EN).
3. Key Tolerance Standards for GH3030 Pipes
We offer GH3030 tubing with high dimensional accuracy to ensure seamless assembly in your fuel manifold or heat exchanger.
Outside Diameter (OD) Tolerance: ±0.1% or ±0.05 mm (whichever is tighter).
Wall Thickness (WT) Tolerance: ±10% or ±0.03 mm.
Straightness: ≤ 1.0 mm per meter (for automatic feeding machines).
Application Of GH3030 pipe & Tube
GH3030 tubing is an essential component for parts subjected to extreme thermal cycling:
Aerospace: Fuel tubing and flame tubes in jet engine combustion chambers.
Industrial Furnaces: Radiant tubes, thermocouple sheaths, and furnace linings.
Power Generation: Internal piping for high-temperature steam and gas turbines.
Petrochemicals: Catalyst support tubes and high-temperature heat exchangers.
Testing Of GH3030 Alloy pipe
Gnee Steel is renowned for its perfect dimensional accuracy. All products undergo rigorous testing before shipment. We perform both destructive and non-destructive testing on all products.
Eddy current testing
Hydrostatic pressure analysis
Pitting corrosion protection testing
Power generation industry
Material composition identification
GH3030 seamless Pipe Packaging
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
About Gnee Steel
To ensure zero-defect reliability in high-speed airflow environments, each GH3030 pipe undergoes a rigorous quality control process:
Vacuum Induction Melting + Electroslag Remelting: Vacuum induction melting combined with electroslag remelting yields ultra-pure metal.
Cold Rolling/Drawing: Multi-pass processing achieves precise dimensional accuracy.
Bright Annealing: Annealing is performed in a controlled hydrogen atmosphere to ensure a clean, scale-free surface.
100% Non-Destructive Testing: Each pipe undergoes eddy current testing and ultrasonic testing (UT).
Certification: All shipments come with a complete EN 10204 3.1 Material Testing Certificate (MTC).
Gnee Steel GH3030 Tube certificate
FAQ
Q1: How does GH3030 compare to 310S Stainless Steel pipes?
A: While 310S is a common heat-resistant steel, GH3030 is a nickel-based superalloy. It offers significantly better oxidation resistance and prevents the "sigma phase" embrittlement that affects stainless steels after long-term exposure to 800°C.
Q2: Can GH3030 tubes be easily welded?
A: Yes. GH3030 is prized for its excellent weldability. It can be joined using TIG, MIG, or spot welding without the risk of post-weld cracking, making it ideal for complex fabricated thermal systems.
Q3: What is your typical lead time for custom-sized tubes?
A: Stock items ship within 7 days. For custom-drawn precision orders, our typical lead time is 3 to 4 weeks, including full non-destructive testing.
Q4: Do you support global door-to-door delivery?
A: Yes. As an experienced global exporter, we provide air, sea, and express logistics with full customs clearance support to over 60 countries.
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