For industrial furnace operators and equipment manufacturers, material deformation (warping) is a major pain point. In extreme high-temperature environments (700°C - 900°C), static linings frequently experience localized overheating, while load-bearing components face a more insidious threat: creep.
Choosing the right high-temperature alloy sheet depends not only on its melting point but, more importantly, on its industrial durability.
Problem: Using GH3030 to manufacture components subjected to heavy mechanical loads can lead to rapid sagging and ultimately failure.
Solution: Accurately determine when to "upgrade" to GH3039 to ensure that furnace components can withstand years of operation, not just months.
Get a quote for selecting professional GH3030 material plates for furnace and kiln projects
Comparison Guide of GH3030 and GH3039 Alloy Plates for Industrial Furnace Linings
Comparison Guide of GH3030 and GH3039 Alloy Plates for Industrial Furnace Linings
GH3030 and GH3039 alloy plates are Chinese nickel-based solid solution strengthened high-temperature alloy plates. Due to their excellent oxidation resistance and structural stability at high temperatures, they are widely used as alloy plates for industrial furnace linings, radiant tubes and other high-temperature components.
What is GH3039 material?
GH3039 is a single-phase austenitic solid solution strengthened nickel-based alloy. Due to its excellent high-temperature strength, thermal fatigue resistance, and corrosion resistance at 850℃, it is the mainstream material for thermocouple protection tubes.
1. Chemical composition (wt%) of GH3030 and GH3039
| Element | GH3030 | GH3039 | Key Difference |
|---|---|---|---|
| Nickel (Ni) | Balance (≥75.0) | Balance (≥65.0) | GH3030 has higher Ni content |
| Chromium (Cr) | 19.0 – 22.0 | 19.0 – 22.0 | Identical |
| Iron (Fe) | ≤ 1.5 (≤1.0 for tube) | ≤ 3.0 | GH3039 allows more Fe |
| Molybdenum (Mo) | – | 1.80 – 2.30 | GH3039 contains Mo for strengthening |
| Niobium (Nb) | – | 0.90 – 1.30 | GH3039 contains Nb for strengthening |
| Titanium (Ti) | 0.15 – 0.35 | 0.35 – 0.75 | GH3039 has higher Ti |
| Aluminum (Al) | ≤ 0.15 | 0.35 – 0.75 | GH3039 contains significant Al |
| Carbon (C) | ≤ 0.12 | ≤ 0.08 | GH3039 has lower C |
| Manganese (Mn) | ≤ 0.70 | ≤ 0.40 | GH3030 allows higher Mn |
| Silicon (Si) | ≤ 0.80 | ≤ 0.80 | Identical |
| Phosphorus (P) | ≤ 0.030 (≤0.015 for tube) | ≤ 0.020 | GH3039 slightly lower |
| Sulfur (S) | ≤ 0.020 (≤0.010 for tube) | ≤ 0.012 | Similar |
| Copper (Cu) | ≤ 0.20 (≤0.007 for tube) | ≤ 0.20 | Identical |
Click to download the GH3030 alloy PDF file now
2. Mechanical Properties (Room Temperature – Annealed / Solution Treated)
| Property | GH3030 | GH3039 | Advantage |
|---|---|---|---|
| Tensile Strength, Ultimate | ≥ 685 MPa | ≥ 735 MPa | GH3039 (~7% higher) |
| Tensile Strength, Yield (0.2% Offset) | ≥ 295 MPa | Not specified* | GH3030 has clear yield point |
| Elongation at Break | ≥ 30% | ≥ 40% | GH3039 (more ductile) |
| Reduction of Area | ≥ 50% | – | – |
| Hardness (HBW) | ≤ 200 | – | – |
| Modulus of Elasticity | ~210 GPa | ~196 GPa | GH3030 (stiffer) |
| Density | 8.4 g/cm³ | 8.3 g/cm³ | GH3039 (slightly lighter) |
3. Comparison of stress fracture life tests at 800°C for GH3030 and GH3039
| Material Grade | Applied Stress (MPa) | Rupture Life (h) | Industrial Verdict |
| GH3030 | 30 MPa | ~100 - 200 hours | Reliable for static thermal shields & liners. |
| GH3039 | 30 MPa | > 500 hours | Superior for load-bearing & rotating parts. |
4. Comparison of technical specifications of GH3030 and GH3039
| Property | GH3030 (Standard) | GH3039 (High Creep) |
| Strengthening Method | Solid Solution (Cr, Ti) | Enhanced Solid Solution (Cr, Mo, Al, Ti) |
| Max Service Temp | 800°C (Stable Oxidation) | 850°C - 900°C (High Load) |
| Oxidation Resistance | Excellent | Exceptional |
| Thermal Fatigue | High | Superior |
| Fabricability | Very Easy | Good |
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GH3030 Alloy Plate & GH3030 Alloy Plate
GH3030 Alloy Plate
Key features: Highly stable microstructure, low aging tendency, excellent machinability, and superior weldability.
Temperature range: Good thermal strength and high plasticity below 800℃.
Applications: Suitable for turboshaft engine combustion chamber components and various high-temperature, low-load furnace linings.
Thickness: Plate thickness is typically 0.3mm to 16.0mm.
GH3039 Alloy Sheet
Main Characteristics: Excellent oxidation resistance, high-temperature creep resistance, and extremely high structural stability.
Temperature Range: Recommended long-term operating temperature below 850℃; can withstand short-term exposure up to 1000℃.
Applications: Widely used in thermocouple protection tubes, industrial furnaces, and heat exchanger components where extremely high thermal fatigue performance is required.
Formability: Excellent cold forming and welding properties.
5. Furnace Lining Comparison and Applications
Both alloys perform excellently in oxidizing environments.
GH3030 is typically used in applications with slightly lower temperatures or loads, while GH3039 is better suited for applications requiring greater resistance to creep and stability under long-term thermal loads.
To ensure performance, both alloys are delivered in both solution and pickled states.
Click to view Gnee Steel GH3030 inventory list
6. Why choose to source GH3030 and GH3039 steel plates from Gnee Steel?
As a Tier-1 Supplier specializing in superalloys, we provide more than just raw material; we provide engineering-grade quality:
Precision Flatness: Our plates undergo advanced leveling to ensure zero warpage, which is critical for seamless installation of furnace liners.
Superior Surface Integrity: We provide pickled or sandblasted finishes that are free from pitting or deep scratches, maximizing Industrial Durability.
Full Traceability: Every order is accompanied by an EN 10204 3.1 Mill Test Certificate (MTC) documenting the exact heat analysis.
Direct Factory Price: Save on procurement costs with our Wholesale Inventory of hot-rolled and cold-rolled plates.
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
Contact us for the latest export price quote for GH3030 Alloy
FAQ
Q1: When should I choose GH3039 over GH3030?
A: If your plate is a "static" component (like a side liner or thermal baffle) that only supports its own weight, GH3030 is the most cost-effective solution. However, if the plate is a "loaded" part (like a furnace tray, roller, or support bracket) that carries workpieces, GH3039 is mandatory to prevent creep-induced failure.
Q2: Can I weld GH3030 to GH3039?
A: Yes. These two alloys have excellent metallurgical compatibility. Using ERNiCr-3 filler metal (Inconel 82), you can achieve high-strength joints that remain stable under thermal cycling.
Q3: Does GH3039 offer better oxidation resistance?
A: Yes, GH3039 generally has a slightly higher chromium content, which provides a more robust protective scale in oxidizing atmospheres at temperatures approaching 900°C.
Q4: Do you offer cut-to-size services for furnace liners?
A: Absolutely. We offer Custom Fabrication, including precision laser cutting and waterjet cutting, to deliver ready-to-install liner sections according to your blueprints.
