GH3030 High Temperature Alloy High Pressure Seamless Tube Selection Guide
GH3030 High Temperature Alloy High Pressure Seamless Tube Selection Guide
GH3030 is a solution-strengthened nickel-chromium superalloy ideal for applications requiring excellent oxidation resistance and thermal stability up to 800°C. When selecting high-pressure seamless tubing from this alloy, the pressure rating, wall thickness, and manufacturing process should be carefully evaluated to ensure structural integrity under high-stress thermal environments.
What are the components of GH3030?
GH3030 is a solid solution strengthened high-temperature alloy, mainly composed of nickel (Ni) and chromium (Cr), with a simple chemical composition. Its typical ratio is 80% nickel and 20% chromium.
| Specifications of High Temperature Gh3030 PIPES |
| 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 |
| Applications | Off-Shore Oil Drilling Companies, Power Generation, Petrochemicals, Gas Processing, Specialty Chemicals, Pharmaceuticals, Pharmaceutical Equipment, Chemical Equipment, Sea Water Equipment, Heat Exchangers, Condensers, Pulp and Paper Industry |
| EQUIVALENT GRADES OF High Temperature Gh3030 |
| China | Russia |
| GH3030 | XH78T |
| CHEMICAL COMPOSITION OF High Temperature Gh3030 |
| Grade | C | Mn | Si | S | Ti | Fe | Ni | Cr | P | Al |
| GH3030 | 0.12 max | 0.70 max | 0.80 max | 0.02max | 0.15-0.35 | 1.5max | balance | 19.00 – 22.00 | 0.03 | 0.15 |
Click to download the GH3030 alloy PDF file now
Mechanical properties of GH3030 high-pressure seamless tube
| Feature | Room Temp (20°C) | Elevated Temp (800°C) | Industrial Verdict |
| Yield Strength (σp0.2) | ≥ 245 MPa | ≥ 100 MPa | Resists deformation at 800°C. |
| Tensile Strength (σb) | ≥ 590 MPa | ≥ 140 MPa | Elite pressure containment. |
| Elongation (δ5) | ≥ 35% | ≥ 50% | Exceptional ductility. |
| Oxidation Stability | High | Superior | Non-scaling up to 900°C. |
The quality of high-pressure tubing originates from the furnace. We don't simply "draw" the tubing; instead, we refine the metal at the atomic level to ensure industrial-grade durability.
VIM (Vacuum Induction Melting): Removes dissolved gases (oxygen, nitrogen, hydrogen), ensuring a perfect chemical balance.
ESR (Electroslag Remelting): As the final liquid filtration process, it removes non-metallic inclusions, ensuring a uniform, inclusion-free grain structure.
Precision Cold Drawing: We employ a multi-stage cold drawing process using precision mandrels to guarantee a concentricity deviation of ≤5%, thus providing a uniform safety margin throughout the entire circumference.
High-Pressure Piping Selection Parameters
When procuring seamless GH3030 tubing for critical or high-pressure systems, please use the following parameters to ensure optimal specifications:
Manufacturing Process: Prefer cold-drawn or hot-extruded seamless tubing over welded tubing to ensure no structural seams and maximum pressure resistance.
Wall Thickness (WT) and Outer Diameter (OD): For high-pressure systems, thicker walls are generally more economical; while standard dimensions for heat exchangers and combustion chambers are typically 6 mm to 60 mm outer diameter and 1.0 mm to 6.0 mm wall thickness.
Surface Finish: Specify a bright annealed (BA) finish for enhanced corrosion resistance and a smoother flow line.
Gnee Alloy GH3030 seamless tube common stock sizes (Sch 40, 80, 160)
Outer Diameter (OD): 6.0 mm – 219.0 mm
Wall Thickness (WT): 0.5 mm – 25.0 mm
Tolerances: Bright tubes are precision ground to h8-h11.
Standard Compliance: GB/T 15062, ASTM B829, AMS 5589 equivalent standards.
Why Choose Gnee as Your Nickel-Based Alloy Supplier
✅️Direct Factory Pricing: Save up to 15-20% by cutting out international trading houses.
✅️100% NDT Verification: Every single meter of tubing undergoes Ultrasonic Testing (UT) and Eddy Current Testing (ET) to ensure zero internal voids.
✅️MTC 3.1 Traceability: Full heat analysis and hydrostatic test reports included with every shipment.
✅️Fast Global Shipping: Optimized logistics for secure delivery to the USA, Europe, UAE, and Southeast Asia within 5-7 business days.
Gnee Alloy 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 Alloy GH3030 Product Packing
Contact us for the latest export price quote for GH3030 Alloy
FAQ
Q1: Is GH3030 pipe suitable for high-pressure fuel injectors?
A: Yes. Thanks to our VIM+ESR process, the material is ultra-clean, making it ideal for precision capillary tubes in fuel systems where inclusions would otherwise cause clogging or leakage.
Q2: How does GH3030 compare to Inconel 600 for pressure service?
A: While both are Ni-Cr alloys, GH3030 contains Titanium (Ti) as a grain stabilizer, which provides better Structural Integrity and oxidation resistance specifically in the 700°C-800°C range.
Q3: Do you offer "Cut-to-Length" services for large projects?
A: Absolutely. We offer precision cutting, deburring, and specialized end-forming to ensure our tubes are ready for immediate assembly or orbital welding.
Q4: Can you provide tubes with a Bright Annealed (BA) mirror finish?
A: Yes. Our Bright Annealed tubes feature an internal surface finish of Ra ≤ 0.4μm, eliminating the risk of internal scale contamination in sensitive sensors.
