In the complex field of aerospace-grade combustor bushings, the choice between GH3030 and GH3039 often determines engine flight time. Are you looking for a material that simplifies manufacturing or one that pushes the limits of heat resistance?
A core challenge for propulsion systems engineers lies in the trade-off between thermal fatigue and machinability: "GH3030 is easier to form, but GH3039 claims a longer lifespan at 850°C. Is the extra cost and machining difficulty worthwhile for my specific bushing design?" Gnee Steel, as your superalloy expert and supply chain partner, offers expert insights to help you optimize your industrial supply.
Please contact our professionals to recommend products suitable for your project
Performance Comparison of GH3030 and GH3039 Seamless Steel Pipes
Performance Comparison of GH3030 and GH3039 Seamless Steel Pipes
GH3030 and GH3039 are nickel-based solid solution strengthened superalloys used in high-temperature applications. Due to the addition of molybdenum (Mo) and niobium (Nb), GH3039 generally exhibits superior strength and oxidation resistance at higher temperatures (< 1000°C), while GH3030 (continuous operating temperature < 800°C) is more suitable for low-load, high-ductility, and high-fatigue environments.
What is GH3039 material?
GH3039 is a high-temperature alloy, also known as Inconel 713C. It is a nickel-based high-temperature alloy with excellent high-temperature strength, oxidation resistance, and creep resistance.
1.Chemical Composition: GH3030 Seamless Tube vs GH3039 Seamless Tube
| Element | GH3030 Seamless Tube Content (%) | GH3039 Seamless Tube Content (%) |
|---|---|---|
| Nickel (Ni) | Balance (≥75) | Balance (≥65) |
| Chromium (Cr) | 19.0 – 22.0 | 19.0 – 22.0 |
| Iron (Fe) | ≤ 1.5 (≤1.0 for tube) | ≤ 3.0 |
| Molybdenum (Mo) | – | 1.80 – 2.30 |
| Niobium (Nb) | – | 0.90 – 1.30 |
| Titanium (Ti) | 0.15 – 0.35 | 0.35 – 0.75 |
| Aluminum (Al) | ≤ 0.15 | 0.35 – 0.75 |
| Carbon (C) | ≤ 0.12 | ≤ 0.08 |
| Manganese (Mn) | ≤ 0.70 | ≤ 0.40 |
| Silicon (Si) | ≤ 0.80 | ≤ 0.80 |
| Phosphorus (P) | ≤ 0.030 (≤0.015 for tube) | ≤ 0.020 |
| Sulfur (S) | ≤ 0.020 (≤0.010 for tube) | ≤ 0.012 |
| Copper (Cu) | ≤ 0.20 (≤0.007 for tube) | ≤ 0.20 |
| Cerium (Ce) | – | Allowed (trace) |
Note: GH3039 alloy was developed by the Shenyang Institute of Metal Research in 1965 based on GH3030 alloy, by adding elements such as aluminum, titanium, molybdenum, and niobium to enhance its strength. GH3030 is a simple 80Ni-20Cr solid solution strengthened alloy, while GH3039 is a more complex Ni-Cr-Mo-Nb-Al-Ti alloy with excellent high-temperature strength and resistance to thermal fatigue, reaching temperatures up to 850-900℃. For seamless pipe products, compared with general specifications, GH3030 has stricter restrictions on the content of Fe (≤1.0%), P (≤0.015%), S (≤0.010%), and Cu (≤0.007%).
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2.Mechanical Properties: GH3030 Pipe vs GH3039 Seamless Tube
| Property | GH3030 Seamless Tube (Annealed) | GH3039 Seamless Tube (Annealed/Solution Treated) |
|---|---|---|
| Tensile Strength, Ultimate (Room Temp) | ≥ 685 MPa | ≥ 735 MPa |
| Tensile Strength, Yield (0.2% Offset) (Room Temp) | ≥ 295 MPa | Not specified (no clear yield point in solution-treated condition) |
| Elongation at Break (Room Temp) | ≥ 30% | ≥ 40% |
| Hardness, Brinell (HB) | ≤ 200 | Not specified |
| Density | 8.4 g/cm³ | 8.3 g/cm³ |
| Melting Range | 1374 – 1420°C | 1352 – 1375°C (approx.) |
| Modulus of Elasticity | 210 – 224 GPa | ~196 GPa |
| Coefficient of Thermal Expansion (20-100°C) | 12.8 × 10⁻⁶/°C | 11.5 × 10⁻⁶/°C |
| Maximum Continuous Service Temperature | ~800°C | ~850 – 900°C |
| Oxidation Resistance | Excellent up to 1000°C (light load) | Excellent up to 1000°C |
| Thermal Fatigue Resistance | Good | Excellent (superior to GH3030) |
| Cold Formability | Good to Excellent | Good |
| Weldability | Good (argon arc, spot, seam welding) | Good (low crack tendency) |
3.Quick Comparison: GH3030 vs GH3039
| Feature | GH3030 | GH3039 |
| Max Working Temp | 800°C | 850°C |
| Plasticity/Forming | Excellent (Highest) | Very Good |
| Thermal Fatigue Life | Standard | Superior |
| Weldability | Exceptional | Excellent |
| Common Application | Stamped & Formed Liners | High-Thermal Load Components |
| Availability | Large Stock / Prompt Delivery | Custom Rolling / Stock |
4.Gnee Steel High Temperature Alloy Manufacturing Specifications
Regardless of grade, our GH3030/GH3039 seamless steel tubes are manufactured using advanced processes to ensure they meet the aerospace industry's zero-defect requirements:
Refining Process: A dual refining process of Vacuum Induction Melting (VIM) + Electroslag Remelting (ESR) is employed. This ensures ultra-low gas content (O, N, H) and prevents the formation of inclusions that lead to fatigue.
Wide Size Range: We offer a full range of products with outer diameters from 6.0mm to 219.0mm, with tolerances up to ±0.05mm.
Exceptional Surface Finish: Each tube undergoes bright annealing (BA). This mirror-smooth, oxide-free surface is crucial for uniform cooling and prevents "hot spots" in the combustion zone.
VIM+ESR Process
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 Product Packing
Contact us for the latest export price quote for GH3030 Alloy
FAQ
Q1: Which alloy is better for complex forming and deep-drawing?
A: GH3030 is the preferred choice. Its exceptional plasticity allows for complex deformations with minimal risk of work-hardening or cracking, making it a very Cost-Effective Solution for intricate parts.
Q2: When should I upgrade from GH3030 to GH3039?
A: If your component is experiencing premature "thermal fatigue cracking" or if your continuous operating temperature exceeds 800°C, upgrading to GH3039 is a highly recommended Material Selection to extend equipment life.
Q3: Does GH3039 require different welding procedures?
A: No. GH3039 maintains the excellent weldability of the GH3030 series. As your Supply Chain Partner, we ensure that our pipes are optimized for high-quality argon-arc and resistance welding.
Q4: Can you provide GH3039 in small-diameter tubes?
A: Absolutely. Our production lines cover the entire 6mm to 219mm range for both grades, allowing us to support everything from instrumentation tubes to heavy-duty structural piping.
