Machining properties and strength of GH3030 material for aero-engine flame tubes
Machining properties and strength of GH3030 material for aero-engine flame tubes
GH3030 seamless tubing is an 8ONi-20Cr solution-strengthened nickel-based superalloy tube (also known as XH78T or El435). Due to its high thermal stability, excellent oxidation resistance (up to 1100℃), and superior weldability, it is widely used in aero-engine flame tubes (combustion chambers) and afterburners. It maintains high plasticity and satisfactory strength even at operating temperatures ranging from 800℃ to 950℃.
What is the hardness of nimonic 75?
Nimonic 75 is a Nickel-based heat resistant superalloy (HRSA) material with a Machinability rating of 17% and Hardness of 90 HRB.
| Specifications of High Temperature Gh3030 Pipe: |
| 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 Pipe: |
| China | Russia |
| GH3030 | XH78T |
| CHEMICAL COMPOSITION OF Gh3030 Alloy Tube: |
| 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 |
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XH78T High-Temperature Alloy Tubing Strength and High-Temperature Performance
High-Temperature Strength: Provides reliable structural integrity for components exposed to high-temperature, low-load environments. Ideal for long-term use at temperatures below 950°C.
Oxidation and Corrosion Resistance: With a nickel content >72% and a chromium content of approximately 20%, it forms a dense, self-healing oxide layer, exhibiting excellent resistance to oxidation, sulfidation, and corrosion in combustion environments.
Thermal Fatigue Resistance: Exhibits excellent thermal fatigue resistance, crucial for flame tubes subjected to cyclic thermal loads.
Microstructure Stability: After solution treatment (1140-1180°C), the material retains a stable single-phase austenitic structure.
Applications in Flame Tubes
GH3030 is primarily selected for flame tubes due to the following characteristics:
Formability: Easily molded into complex shapes.
Thermal Stability: Excellent thermal cycling stability, resisting deformation even under the high temperature and vibration conditions of the combustion chamber.
High-Temperature Oxidation Resistance: Maintains stable performance even under extreme high-temperature environments.
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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 Pipe Packing
About Gnee Steel
Gnee Steel is a professional manufacturer of nickel-based alloys, including Nickel 201, Nickel 202, Hastelloy C-276, Hastelloy C-22, Hastelloy B, Hastelloy C-4, Inconel 600, Inconel 625, Inconel 718, Inconel X-750, Incoloy 800, Incoloy 800H/HT, Incoloy 825, Monel 400, Monel K500, and other high-temperature alloy materials. We specialize in the production and sales of alloy materials. Gnee Steel's products are widely used in aerospace, chemical, power generation, automotive, nuclear energy, and other fields, and we can provide customized alloy material solutions according to customer needs. For inquiries about alloy material prices or customized alloy material solutions, please feel free to contact us via email at ss@gneemetal.com for a quote.
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FAQ
Q1: Is post-weld heat treatment necessary for GH3030 flame tubes?
A: No. One of the greatest advantages of GH3030 is that it is typically used in the as-welded condition. This significantly simplifies the manufacturing process and prevents the risk of distortion during complex aging cycles.
Q2: How does GH3030 compare to Nimonic 75 for aviation use?
A: GH3030 is the direct equivalent of Nimonic 75 (UNS N06075). Our materials meet and often exceed the specifications of BS HR5, making them a safe and Cost-effective Solution for international aerospace blueprints.
Q3: Can GH3030 handle the corrosive gases in a flame tube?
A: Yes. Its high chromium content (19-22%) provides excellent Oxidation Resistance and stability against combustion products, ensuring a long Material Life Cycle.
