High-temperature Nickel-based Alloy GH3044 Round Seamless 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
Gnee Alloy GH3044 Aerospace Piping Export Markets
| Region / Market | Key Procurement Characteristics |
|---|---|
| Russia & CIS Countries (Largest volume market for GH3044 pipes in military aviation) | Large annual framework orders for fighter jet engine gas pipe replacement; mandatory VIM+ESR aviation‑grade process; complete dual‑use export customs documentation and ЭИ868 compliance certificate required. |
| India & Pakistan (Military aviation MRO) | Mix of small trial samples and annual bulk pipe orders; price‑sensitive; single VIM process grade acceptable for non‑core auxiliary gas piping. |
| Middle East (Saudi Arabia, UAE) (Civil aviation MRO) | Emergency replenishment orders for gas pipes; strict requirement for SGS/TUV 3.2 full‑witnessed MTC (Material Test Certificate). |
| Western Europe (Germany, France) (Civil aviation OEM) | Demand for BA‑grade bright ultra‑thin GH3044 seamless pipes; third‑party inspection reports equivalent to GJB (National Military Standard) required for each batch. |
| Southeast Asia (Local aviation component factories) | Rapid delivery requirements for standard pipe blanks; low MOQ (Minimum Order Quantity) supported for secondary bending operations. |
Contact us to create a tailored solution for your project
High-temperature nickel-based alloy GH3044 Round seamless pipe description
GNEE High-temperature nickel-based alloy GH3044 Round seamless pipe
GH3044 is a solid-solution strengthened nickel-chromium-based superalloy designed to provide excellent oxidation and carburization resistance, as well as moderate thermal strength, at temperatures up to 900°C. It also exhibits excellent plasticity, formability, stamping characteristics, and weldability. Its room-temperature mechanical property requirements include a tensile strength of ≥1050 MPa and a yield strength of ≥600 MPa.
Product forms include hot-rolled or cold-rolled seamless round tubes that comply with international material standards. Typical applications span demanding environments such as aero-engine combustion chambers and afterburners, heat shields, guide vanes, and fuel conduits, as well as high-temperature industrial furnaces and chemical reactors.
Available Product Forms of GH3044 Tube
| Product Form | OD Range | Wall Thickness Range | Delivery Condition |
|---|---|---|---|
| Seamless Tube | 6–219 mm (Custom available) | 0.5–20 mm (Custom available) | Solution + Pickling |
| Welded Tube | Custom | Custom | Solution + Pickling |
| Capillary Tube | OD ≥3 mm available | ≥0.5 mm | Solution + Pickling |
Applicable Standards for GH3044 Aviation Tubing
| Standard No. | Title | Application Range |
|---|---|---|
| GB/T14992 | Superalloy Designations | General |
| GB/T15062 | Superalloy Tubes for General Use | Tubes |
| GJB 1952-1994 | Cold-Rolled Thin Sheets for Aviation | Cold-rolled sheets |
| GJB 2612-1996 | Cold-Drawn Wire for Welding for Aviation | Wire |
| GJB 3020-1997 | Ring Blanks for Aviation | Ring blanks |
| GJB 3165-1998 | Hot-Rolled and Forged Bars for Aviation | Bars |
| GJB 3317-1998 | Hot-Rolled Sheets for Aviation | Hot-rolled sheets |
| GJB 3318-1998 | Hot-Rolled Strips for Aviation | Hot-rolled strips |
| HB 5189 | Forgings for Aviation | Forgings |
Specifications of High Temperature Gh3044 Pipe
| Parameter | GH3044 (GH44) |
|---|---|
| Material Type | Ni-Cr based solid-solution strengthened wrought superalloy |
| Similar Grades | ЭИ686, ХН60ВТ, ВЖ90 (Russia) |
| Product Form | Cold-drawn / cold-rolled seamless tube (custom sizes available; typical range: OD Φ3–114mm, larger sizes available upon request) |
| Applicable Standards | GB/T 15062 (General Purpose Superalloy Tube), GB/T 14992, GJB 3165, GJB 3020 |
| Typical Tube Applications | Aero-engine combustion chambers, afterburner components, heat shields, high-temperature gas ducts, guide vanes, industrial furnace tubes |
| Service Temperature | Long-term up to 900°C |
| Strengthening Mechanism | Solid-solution strengthening (W 13–16%) + carbide strengthening (MC, M₂₃C₆) |
| Density | 8.89 g/cm³ |
| Melting Range | 1352 – 1375°C |
| Magnetic Properties | Non-magnetic |
High-temperature nickel-based alloy GH3044 Round seamless pipe Specification
Chemical composition of GH3044 aviation tubing (wt%) – Per GB/T 14992
| Element | Min (wt%) | Max (wt%) | Role / Engineering Significance |
|---|---|---|---|
| Nickel (Ni) | - | Balance | Matrix element - provides high-temperature stability and corrosion resistance base |
| Chromium (Cr) | 23.5 | 26.5 | Core oxidation resistance element - forms Cr₂O₃ protective film; provides excellent high-temperature oxidation resistance |
| Tungsten (W) | 13.0 | 16.0 | Core solid-solution strengthening element - lattice distortion enhances high-temperature strength and creep resistance; key distinguishing feature |
| Iron (Fe) | - | 4.0 | Controlled impurity - limited to maintain Ni-base matrix characteristics |
| Molybdenum (Mo) | - | 1.50 | Secondary solid-solution strengthening |
| Aluminum (Al) | - | 0.50 | Oxidation resistance and deoxidation |
| Titanium (Ti) | 0.30 | 0.70 | Carbide former (TiC) - refines grain structure; provides grain boundary strengthening |
| Carbon (C) | - | 0.10 | Carbide former (MC, M₂₃C₆) - grain boundary strengthening |
| Manganese (Mn) | - | 0.50 | Deoxidation |
| Silicon (Si) | - | 0.80 | Deoxidation |
| Phosphorus (P) | - | 0.013 | Strictly controlled - ensures hot workability and weldability |
| Sulfur (S) | - | 0.013 | Strictly controlled - ensures hot workability and weldability |
| Copper (Cu) | - | 0.07 | Impurity element control |
Physical Properties of GH3044 Aviation Tubing
| Property | Value | Unit | Source |
|---|---|---|---|
| Density | 8.89 | g/cm³ | |
| Melting Range | 1352 – 1375 | °C | |
| Thermal Conductivity (100°C) | 11.7 | W/(m·K) | |
| Thermal Conductivity (900°C) | ~ 24.7 | W/(m·K) | |
| Elastic Modulus (RT) | 203 | GPa | |
| Specific Heat | 440 | J/(kg·K) | |
| CTE (20–100°C) | 12.25 × 10⁻⁶ | /°C | |
| CTE (20–900°C) | 15.6 × 10⁻⁶ | /°C | |
| Magnetic Properties | Non-magnetic | - |
Room-Temperature Mechanical Properties of GH3044 Aviation Tubing - Solution-Treated Condition
| Test Temperature | Min Tensile Rm (MPa) | Min Elongation A | 100h Lasting Strength | 1000℃ Oxidation Weight Loss | Matching Aero Pipeline Scenario |
|---|---|---|---|---|---|
| Room Temp | ≥685 | ≥40 | - | - | Thin pipe cold bending blank processing |
| 900℃ Long-Term Gas Circulation | ≥195 | ≥30 | ≥70MPa | ≤0.1mg/cm²·h | Main engine combustion gas pipeline |
| 1050℃ Short Peak Temp | ≥95 | ≥48 | - | ≤0.28mg/cm²·h | Afterburner auxiliary short pipeline |
GH3044 Seamless Aerospace Round Tubing: Exclusive Production Processes, Smelting Grades, and Full Size Range
Classification of Manufacturing Processes for GH3044 Aerospace Tubing
Single-melt VIM (Industrial Grade): Suitable for non-critical auxiliary gas lines; basic single-pass ultrasonic testing (UT); lower procurement cost; does not meet military aircraft supplier audit requirements.
VIM+ESR (Aerospace Premium Grade – Mandatory for main engine gas lines): Dual vacuum remelting process eliminates ingot element segregation and internal microporosity; meets aerospace-grade Class A flaw detection standards (UT + ET + DP: Ultrasonic + Eddy Current + Dye Penetrant); holds comprehensive dual-use aerospace export licenses and compliance documentation for the Russian EI868 standard.
Manufacturing Process for GH3044 Aerospace-Grade Cold-Drawn Seamless Pipe
VIM/VIM+ESR vacuum-melted GH3044 tube hollows → Multi-pass cold rolling (cold pilgering) + precision cold drawing (wall thickness tolerance controlled to ±0.02mm for thin-walled aerospace tubes) → Intermediate stress-relief annealing → Standardized solution heat treatment → 100% triple non-destructive testing (NDT) → Custom tube-end flanging/bending → Aerospace-grade airworthy packaging.
Three Export Surface Finish Options for GH3044 Aerospace Seamless Tubing
| Surface Finish | Key Features / Characteristics | Typical Applications |
|---|---|---|
| BA (Bright Annealed) (Accounts for 75% of global aerospace gas line bulk orders) | Inert gas‑shielded annealing; no internal oxide scale; prevents contamination of internal gas media | Main engine gas delivery systems |
| AP (Acid Pickled / Matte) | Cost‑effective | Short auxiliary engine gas lines |
| 400–600 Mesh Mirror‑Polished | High‑precision polished surface | Specialized for high‑precision exhaust thermocouple protective sheaths |
Stock Specification Range for GH3044 Seamless Aviation Tubing
| Parameter | Specification |
|---|---|
| Outer Diameter (OD) | Φ8 mm – 280 mm; Standard pipe schedules: SCH5 / SCH10 / SCH40 |
| Wall Thickness | 0.5 mm – 22 mm; Ultra‑thin 0.3 mm wall tubing customizable for lightweight aerospace piping systems |
| Standard Single‑Tube Length | 1000 mm – 6000 mm; Supports custom cut‑to‑length specifications and small‑radius U‑bend forming |
| Tolerance Control | Wall thickness tolerance of ±0.02 mm for thin‑walled tubes (strictly compliant with aerospace drawing specifications) |
Gnee Alloy GH3044 Aviation Tubing Non-Destructive Testing (NDT) Standards
100% ultrasonic wall thickness scanning; 100% eddy current surface defect inspection; 100% penetrant testing of formed tube ends and welded areas.
Heat Treatment Requirements for Gnee Alloy GH3044 Aviation Tubing
| Condition | Temperature | Cooling | Application |
|---|---|---|---|
| Standard Solution (Supply) | 1120 – 1160°C | Air Cool (AC) | Tube - standard delivery condition |
| Intermediate Annealing (Forming) | 1140°C ± 10°C | Air Cool (AC) | During multi-stage forming operations |
| High-Temperature Solution | 1200°C ± 10°C | Air Cool (AC) | For higher hot strength |
application Of High-temperature nickel-based alloy GH3044 Round seamless pipe
| Application | Operating Conditions / Key Features | Specific Use |
|---|---|---|
| Main Jet Engine Combustion Chamber Gas Delivery Seamless Tube | Withstands long‑term 900°C static high‑temperature gas cycling; core GH3044 tube product; VIM+ESR (Vacuum Induction Melting + Electroslag Remelting) aviation‑grade process required | Main combustion chamber gas delivery systems |
| Afterburner Auxiliary High‑Temperature Gas Branch Pipe | Withstands short‑term peak 1050°C temperature shocks; thin‑wall GH3044 seamless round tube | Branch gas delivery for afterburner systems |
| Aero‑Engine Heat Shield Inner Duct | Static heat‑insulating gas delivery piping located inside the afterburner casing | Heat shield gas transport |
| High‑Temperature Thermocouple Protection Sleeve | Polished thin‑wall GH3044 tubing; used as housing for engine temperature sensors | Thermocouple sensor protection |
| Auxiliary Power Unit (APU) Exhaust Piping | Small‑diameter lightweight seamless tube for aircraft auxiliary engines | APU exhaust systems |
High-temperature nickel-based alloy GH3044 Round seamless pipe production process
Gnee Steel provides the following heat treatments for High-temperature nickel-based alloy GH3044 Round seamless pipe: annealing, solution + aging. In addition, Gnee Steel also provides hot working and cold working, which are hot rolling and cold drawing.
Key Features of High-temperature nickel-based alloy GH3044 Round seamless pipe
| Alloy Seamless Tube | Optimum Long-Term Temp | Core Unique Advantage | Main Defect | Matching Aero Pipeline | Cost Level |
|---|---|---|---|---|---|
| GH3044 (ЭИ868) | ≤900℃ Static Gas | Industry-leading static oxidation resistance, low stamping/bending scrap rate | Inferior thermal cycle fatigue under frequent heating-cooling | Constant-temperature combustion gas main pipe | Medium-Low |
| GH3128 | ≤950℃ Cyclic Load | Superior cyclic thermal fatigue & creep strength | Higher raw material cost, poor static anti-oxidation | Repeated temperature fluctuation afterburner pipe | High |
Core Procurement Conclusion For Aero Pipeline Designers: If your pipeline runs under stable constant 900℃ high-temperature gas without frequent thermal shock, GH3044 seamless tube is the most cost-effective aviation designated material, reducing pipeline oxidation failure rate by over 65%.
Contact our experts to recommend the right alloy for your project
High-temperature nickel-based alloy GH3044 Round seamless pipe Packaging
Standard Export Sea Freight Packaging:
Waterproof paper roll + PVC film + strapping + wooden pallet or crate;
Customized packaging available upon request (logo or other content can be printed on the packaging);
Other special packaging designs available upon request;
Wall-mounted and skylight transport available;
International Express: DHL/UPS/FEDEX/EMS and our own dedicated line;
Air or Sea Freight;
Port of Loading: Shanghai, Ningbo, or as per your requirements.
OEM and Customization Services
We offer comprehensive OEM and custom processing services to meet the needs of various industries:
Precision shearing, waterjet cutting, and laser cutting
Logo embossing, barcodes, and material traceability labels
Export-grade packaging using fumigation-free wooden crates
Inspection by SGS, BV, or a third-party organization designated by the customer.
GNEE's Expertise in Manufacturing Aerospace-Grade GH3044 Seamless Tubing
Established in 2008, with over 18 years of experience exporting aerospace seamless tubing and an 8,500-square-meter dedicated tube production facility
Equipped with German-imported cold-rolling machinery and VIM+ESR dual-vacuum remelting furnaces specifically for GH3044 aerospace tubing
Features a comprehensive professional testing laboratory equipped with high-temperature oxidation furnaces, a full suite of UT/ET/DP non-destructive testing (NDT) equipment, and metal spectrometers
Holds full international certifications: ISO9001, ISO14001, and ISO45001, alongside third-party aerospace qualifications from SGS and TÜV Rheinland
Dedicated export team for the Russian market, expert in ЭИ868 certification and customs clearance procedures for the CIS region
Flexible ordering policies: no strict Minimum Order Quantity (MOQ) for small-batch sample orders, and preferential pricing secured through annual framework contracts
Gnee Alloy GH3044 certificate
About Gnee alloy
Please submit the following information via email to receive an accurate aerospace-grade quote within one hour:
Precise tubing specifications: Outer diameter, wall thickness, total length, U-bend/flanging requirements, and surface finish (BA/AP/Polished)
Continuous operating temperature and specific engine application (Main combustion chamber / Afterburner / APU)
Melting grade requirements: Single Vacuum Induction Melting (VIM) industrial grade / VIM + Electroslag Remelting (ESR) aerospace premium grade
Order type: Small-batch samples / Annual volume framework agreement / Urgent MRO (Maintenance, Repair, and Overhaul) replenishment
Special certification requirements: 3.2 SGS report / Compliance with Russian EI868 standard / Export license for aerospace dual-use items
Free laboratory samples of thin-walled tubing available (international shipping costs borne by the buyer)
Receive the complete technical datasheet for GH3044 aerospace gas turbine tubing and a comparative report between GH3044 and GH3128 immediately upon inquiry submission
Comprehensive support for custom processing services, including bending, flanging, and precision cutting to length
FAQ
Q1 What is GH3044 equivalent grade? What is its core advantage for aero engine gas pipe?
A GH3044 Russian equivalent ЭИ868, high tungsten-chromium solid solution nickel alloy. Its irreplaceable core strength is outstanding static anti-oxidation performance under stable 900℃ gas circulation, far superior to GH3128 for constant-temperature engine gas pipelines; long-term safe service temperature ≤900℃, only single solution heat treatment required, no aging needed.
Q2 What seamless tube sizes do we keep in aviation stock? Available surface finishes?
A Standard OD Φ8–280mm, wall thickness 0.3–22mm, customizable U-bend forming; three aviation tube surfaces: BA bright (main engine gas pipe), AP pickled auxiliary pipe, mirror polished thermocouple sleeve. All products seamless round tube only, no welded pipe for core aero gas systems.
Q3 Difference between VIM single melting and VIM+ESR remelting GH3044 aviation pipe?
Single VIM Industrial Grade: For non-core auxiliary APU gas pipe, basic UT inspection, lower cost, cannot pass Russian military aircraft supplier audit
VIM+ESR Aviation Premium Grade: Mandatory for main combustion gas pipeline, eliminates W element segregation & internal micro-pores, full UT+ET+DP triple NDT Class A report, complete dual-use export + ЭИ868 conformity documents for Russia/CIS aerospace shipments.
Q4 Which surface finish is most widely used for main aero engine gas seamless pipe?
A BA bright inert annealed tube accounts for 75% global bulk orders, no inner oxide scale to avoid contamination of high-temperature engine gas medium, meets aviation pipeline ultra-cleanliness standard.
Q5 What impurity limits do we control to prevent thin pipe welding & oxidation failure?
A All aviation batches lock S≤0.010%, P≤0.010%, W content controlled ±0.5% tolerance; low-cost suppliers reduce W dosage leading to pipeline oxidation peeling under 90℃ gas circulation. Every shipment provides full PMI spectral test report.
Q6 What oxidation & mechanical test data will be attached to aviation MTC certificate?
A Full room temperature tensile, 900℃ high-temperature tensile, 100h lasting strength, 1000℃ oxidation weight loss test data, full triple NDT flaw records for aircraft tender audit.
Q7 Core aero engine pipeline application scenarios of GH3044 seamless round tube?
Main jet engine combustion chamber gas delivery pipe (largest bulk demand)
Afterburner auxiliary high-temperature gas branch pipe
APU aircraft auxiliary power unit exhaust gas pipeline
Engine thermocouple polished protection sleeve tube
Afterburner casing internal heat insulation conduit
Q8 What export certification documents for Russia/CIS aerospace shipments?
Free EN10204 3.1 factory MTC for all orders; optional paid SGS/TUV 3.2 witnessed inspection report. Additional files: CO certificate, commercial invoice, aerospace dual-use material export license, Russian ЭИ868 material conformity certificate. All test data archived 10 years for re-audit.
Q9 MOQ & delivery cycle for GH3044 aviation gas pipe orders?
No strict MOQ for small test thin pipes (5kg minimum support). Standard aviation stock pipe delivery 7–15 working days; custom bending/flanging processing 15–25 days; custom VIM+ESR vacuum ingot production 30–45 working days. Free test samples available (customer cover international freight).
Q10 Standard heat treatment process for GH3044 aero pipe, need aging?
A GH3044 is solid solution alloy, aging treatment is completely unnecessary. Standard solution heat treatment: 1120~1160℃ holding, air rapid cooling. Single heat treatment can fully release bending & welding ductility as well as high-temperature oxidation resistance.
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