In the field of high-temperature alloys, the "most expensive" isn't always the "best" for your project. For purchasing managers and thermal engineers, the gap between material costs and requirements is a major pain point.
Budget Overrun Trap: Choosing high-performance GH4169 (equivalent to Inconel 718) for simple furnace baffles or heat shields with low mechanical loads is essentially paying for unused strength.
Failure Risk: Using the more affordable GH3030 (equivalent to Nimonic 75) on rotating shafts or high-pressure manifolds can lead to immediate structural integrity failure.
At Gnee Alloy, we eliminate the guesswork. We provide the most cost-effective solutions by perfectly matching the metallurgical "superior properties" of alloys to your specific stress environment.
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Gh3030 vs Gh4169 Sheet High Temperature Resistant Nickel Alloy Plate
GH3030 and GH4169 are both high-temperature nickel-based alloy plates, but they meet different performance requirements. GH3030 is a solid solution strengthened alloy, with optimized properties including oxidation resistance and weldability below 800°C. GH4169 (similar to Inconel 718) is a high-strength precipitation-hardening superalloy capable of withstanding higher stresses and temperatures.
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.
1. GH3030 and GH4169 Material Overview
| Parameter | GH3030 | GH4169 |
|---|---|---|
| Material Type | Wrought Nickel-based Superalloy | Wrought Nickel-based Superalloy |
| Strengthening Mechanism | Solid-solution strengthening (Cr + minor Ti) | Precipitation hardening (γ″ + γ′) |
| Product Forms | Plate, strip, bar, tube, wire | Plate, strip, bar, tube, forging |
| Typical Applications | Combustion chambers, flame tubes, afterburners, high-temperature furnace parts | Turbine discs, compressor blades, fasteners, shafts |
| Maximum Service Temperature (Load-Bearing) | ~800°C | ~650 – 700°C |
2. Comparison of chemical composition of GH3030 and GH4169 (wt%)
| Element | GH3030 | GH4169 | Key Difference |
|---|---|---|---|
| Nickel (Ni) | Balance (≥ 75.0) | 50.0 – 55.0 | GH3030 has much higher Ni |
| Chromium (Cr) | 19.0 – 22.0 | 17.0 – 21.0 | GH3030 slightly higher |
| Iron (Fe) | ≤ 1.5 | Balance (~18-20) | GH4169 has much higher Fe |
| Niobium (Nb) | – | 4.75 – 5.50 | GH4169 unique – γ″ former |
| Molybdenum (Mo) | – | 2.80 – 3.30 | GH4169 unique |
| Titanium (Ti) | 0.15 – 0.35 | 0.65 – 1.15 | GH4169 higher |
| Aluminum (Al) | ≤ 0.15 | 0.20 – 0.80 | GH4169 higher |
| Carbon (C) | ≤ 0.12 | ≤ 0.08 | GH3030 slightly higher |
| Manganese (Mn) | ≤ 0.70 | ≤ 0.35 | GH3030 higher |
| Silicon (Si) | ≤ 0.80 | ≤ 0.35 | GH3030 higher |
| Phosphorus (P) | ≤ 0.030 | ≤ 0.015 | – |
| Sulfur (S) | ≤ 0.020 | ≤ 0.015 | – |
| Boron (B) | – | 0.002 – 0.006 | GH4169 unique |
| Copper (Cu) | ≤ 0.20 | ≤ 0.30 | – |
Click to download the GH4169 alloy PDF file now
3. Comparison of strength and stability between GH3030 and GH4169
| Feature | GH3030 (The Static Specialist) | GH4169 (The Load Specialist) | Commercial Impact |
| Global Equivalent | Nimonic 75 / Alloy 75 | Inconel 718 / Alloy 718 | Direct standard compliance. |
| Strengthening Method | Solid Solution (Cr, Ti) | Precipitation Hardening (
γ′′γ′′ ) |
GH4169 requires complex aging. |
| Yield Strength (650°C) | ~ 200 MPa | ≥ 850 MPa | GH4169 is 4x Stronger. |
| Oxidation Limit | 800°C - 900°C | 700°C (Strength limit) | GH3030 resists scaling longer. |
| Weldability | Superior (No cracks) | Excellent (Delayed aging) | GH3030 reduces labor costs. |
| Procurement Cost | Lower ($) | Premium ($) | Significant savings potential. |
GH3030 and GH4169 Selection Guide
When to Choose GH3030 (Save up to 40% on your budget)
If your application involves static thermal conditions where parts bear only their own weight, then GH3030 is the best choice. Its high plasticity makes it ideal for applications such as:
Industrial furnace linings and baffles.
Radiant tube internal components.
Heat treatment fixtures and trays.
Expert Tip: GH3030 has superior oxidation stability above 800°C compared to over-aged GH4169.
When to Choose GH4169
If your application involves mechanical stress, internal pressure, or high-speed rotation, then GH4169 is essential. Its superior fatigue life is critical for applications such as:
Turbine discs and engine shafts.
High-strength aerospace fasteners.
High-pressure fuel and hydraulic lines.
Cryogenic tanks (remaining tough at -253°C).
Why should we source GH4169 from our Gnee Alloy inventory?
As a Tier-1 Manufacturer, we ensure your budget buys the highest possible Industrial Durability:
✅️VIM + VAR Melting: Ensuring ultra-pure GH4169 to maximize its fatigue performance.
✅️Precision Leveling: Our sheets have a Precision Flatness guarantee, essential for automated laser cutting.
✅️MTC 3.1 Traceability: Every order includes full chemical and mechanical verification certificates.
✅️Direct Factory Price: Eliminate middleman markups and secure Wholesale Pricing for your bulk energy and defense projects.
Gnee Alloy GH4169(inconel 718) Certificate
Contact us for the latest export price quote for GH4169 Alloy
FAQ
Q1: Can I weld GH3030 and GH4169 together in one assembly?
A: Yes. They have excellent metallurgical compatibility. We recommend using specialized nickel-based filler metals (like ERNiCr-3) to ensure the joint remains stable under thermal cycling.
Q2: Is GH3030 easier to fabricate into complex shapes?
A: Absolutely. GH3030 is significantly more ductile in the solution-treated state, allowing for deep drawing and complex spinning that would be difficult or impossible with GH4169.
Q3: Which alloy has a better material life cycle in sulfur-free oxidizing environments?
A: For static parts at 800°C, GH3030 typically has a better life cycle because it does not suffer from the "over-aging" softening that can occur in GH4169 at that temperature.
Q4: Do you offer cut-to-size services for small-batch furnace repairs?
A: Yes. We offer precision laser and waterjet Cut-to-Size services for both grades to help you minimize material waste and labor time.
