For purchasing managers and CNC machining workshop owners, the biggest pain point lies in the gap in machining processes. Procuring materials is relatively easy, but preventing tool damage or welding defects during processing is the real challenge.
Common industrial problems include:
* **Work hardening disaster:** Standard toolpaths lead to surface hardening, causing carbide inserts to break.
* **Oxide scale contamination:** Poorly annealed materials are prone to peeling during use.
* **Certification anxiety:** Uncertainty about whether materials meet international aerospace standards.
At Gnee Alloy, we offer aerospace-grade GH3030 Alloy and specialized technology to ensure the integrity of your structures, thus bridging this gap.
Click to get a GH3030 product quote
Comprehensive guide to GH3030 alloy
Comprehensive guide to GH3030 alloy
GH3030 is an 80Ni-20Cr solid solution strengthened superalloy. It is highly regarded for its simple chemical composition, excellent oxidation resistance and good plasticity, and is mainly used in turbine engine combustion chamber components and other high-temperature, low-load applications with a maximum temperature of 1100°C.
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 Material Overview
| Parameter | Description |
|---|---|
| Material | GH3030 |
| Material Type | Wrought Nickel-based Superalloy |
| Strengthening Mechanism | Solid-solution strengthening (Cr + trace Ti) |
| Product Forms | Bar, plate, tube, strip, wire, forging |
| Applicable Standards | GB/T 14992, GB/T 14994, GB/T 14995, GB/T 14996, GB/T 14997, GB/T 14998, YB/T 5249 |
| Typical Applications | Combustion chambers, afterburners, furnace components, high-temperature tubing, heat exchangers |
| Maximum Service Temperature (Load-Bearing) | ~800°C |
| Maximum Service Temperature (Oxidation) | ~1000°C |
| Delivery Condition | Solution treated (annealed) – not age-hardenable |
2. Chemical composition of GH3030 (wt%)
| Element | Content (%) | Function |
|---|---|---|
| Nickel (Ni) | Balance (≥ 75.0) | Matrix element; high-temperature stability |
| Chromium (Cr) | 19.0 – 22.0 | Oxidation and corrosion resistance |
| Iron (Fe) | ≤ 1.5 | Residual element (strictly controlled) |
| Titanium (Ti) | 0.15 – 0.35 | Supplementary solid-solution strengthening |
| Aluminum (Al) | ≤ 0.15 | Residual element (prevents harmful phases) |
| Carbon (C) | ≤ 0.12 | Low carbon for toughness and weldability |
| Manganese (Mn) | ≤ 0.70 | Deoxidizer |
| Silicon (Si) | ≤ 0.80 | Deoxidizer |
| Phosphorus (P) | ≤ 0.030 | Ensures toughness |
| Sulfur (S) | ≤ 0.020 | Ensures hot workability |
| Copper (Cu) | ≤ 0.20 | Residual element |
3. GH3030 High Temperature Mechanical Properties (Typical Values)
| Temp (°C) | Tensile Strength (MPa) | Yield Strength (MPa) | Elongation (%) | Strength Retention (%) |
|---|---|---|---|---|
| 20 (RT) | ≥ 685 | ≥ 295 | ≥ 30 | 100 |
| 300 | ~620 | ~270 | ~30 | 90 |
| 400 | ~590 | ~260 | ~32 | 86 |
| 500 | ~560 | ~250 | ~35 | 82 |
| 600 | ~520 | ~240 | ~38 | 76 |
| 650 | ~500 | ~230 | ~40 | 73 |
| 700 | ~450 | ~220 | ~40 | 66 |
| 750 | ~400 | ~200 | ~42 | 58 |
| 800 | ~350 | ~180 | ~42 | 51 |
| 850 | ~300 | ~150 | ~44 | 44 |
| 900 | ~250 | ~120 | ~45 | 36 |
High-Temperature Strength Retention
| Temperature | Strength Retention | Design Recommendation |
|---|---|---|
| 500°C | ~82% | Excellent for long-term service |
| 600°C | ~76% | Good for load-bearing |
| 700°C | ~66% | Reduce design stress |
| 800°C | ~51% | Lower stress applications |
| 900°C | ~36% | Short-term / low load only |
Click to download the GH3030 alloy PDF file now
4. GH3030 Physical Properties
| Property | Value | Unit |
|---|---|---|
| Density | 8.4 | g/cm³ |
| Melting Range | 1374 – 1420 | °C |
| Thermal Conductivity (20°C) | 14 – 15 | W/m·K |
| Thermal Conductivity (500°C) | ~19 | W/m·K |
| CTE (20-100°C) | 12.8 × 10⁻⁶ | /°C |
| CTE (20-500°C) | ~14.0 × 10⁻⁶ | /°C |
| CTE (20-800°C) | ~16.0 × 10⁻⁶ | /°C |
| Specific Heat (20°C) | 460 – 500 | J/kg·K |
| Specific Heat (600°C) | ~550 | J/kg·K |
| Electrical Resistivity | 1.20 – 1.30 | µΩ·m |
| Magnetic Properties | Non-magnetic | - |
5. GH3030 heat treatment
| Treatment | Temperature | Time | Cooling | Purpose |
|---|---|---|---|---|
| Solution Treatment (Annealing) | 980 – 1050°C | Per thickness | Air or water | Softening, carbide dissolution |
6. GH3030 Machining Characteristics
| Property | Rating | Notes |
|---|---|---|
| Cold Formability | Excellent | Can be bent, flared, coiled, and expanded |
| Hot Formability | Excellent | Good hot working plasticity |
| Weldability | Excellent | TIG, MIG, resistance welding; no PWHT required |
| Machinability | Good (~40% of 1% C steel) | Use sharp tools, adequate cooling |
| Heat Treatment | Simple | Annealing only |
| Work Hardening Rate | Low | Easier to cold work than many superalloys |
7. GH3030 corrosion resistance
| Environment | Resistance Level |
|---|---|
| Oxidizing Atmospheres (to 1000°C) | Excellent |
| Nitric Acid (HNO₃) | Good to Excellent |
| Sulfuric Acid (dilute) | Fair |
| Hydrochloric Acid | Poor |
| Alkaline Solutions | Good |
| Seawater | Limited |
| Chloride Stress Corrosion Cracking | Moderate |
8. GH3030 Alloy Product Forms
GH3030 has a wide range of applications and can be easily produced and supplied in various forms to meet diverse structural requirements:
Cold-rolled and hot-rolled sheets,
Round bars,
Seamless tubes,
Wires, and rings.
9. GH3030 Applications
Due to its superior oxidation resistance and thermal fatigue resistance, GH3030 is the material of choice in several demanding applications:
Aerospace: Combustion chamber components, exhaust nozzles, and housings for gas turbines and aircraft engines.
Chemical Processing: Structural components, heat exchangers, and accessories exposed to high temperatures and corrosive environments.
Why Choose Gnee as Your Nickel-Based Alloy Supplier
✅️Direct Factory Price: Eliminate markups and secure Wholesale Pricing for your large-scale projects.
✅️MTC 3.1 Traceability: Every order is delivered with full heat-analysis and mechanical test reports.
✅️Massive Stock: Seamless tubes, precision sheets, and forged bars ready for Fast Global Shipping.
✅️Custom Fabrication: We offer precision laser cutting, centerless grinding, and bending to your blueprints.
Gnee Alloy 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 Alloy GH3030 Product Packing
⚒️Gnee Alloy Production Line Equipment and Product Testing
Contact us for the latest export price quote for GH3030 Alloy
FAQ
Q1: Is GH3030 equivalent to Nimonic 75?
A: Yes. GH3030 is the globally recognized designation for the UNS N06075/Alloy 75 system. It is universally interchangeable in aerospace and industrial furnace design drawings.
Q2: What is the maximum service temperature for GH3030 structural parts?
A: For continuous structural loads, we recommend a limit of 800°C (1472°F). Above this, the creep rate increases. For oxidation resistance without load, it can withstand up to 950°C.
Q3: Does the material require post-weld heat treatment?
A: For static furnace parts, usually No. GH3030 provides excellent stability in the as-welded condition. For critical aerospace assemblies, a stress-relief anneal may be performed.
Q4: Do you support small batch R&D orders?
A: Absolutely. We support Innovation by offering Flexible MOQs for certified specimens and trial production runs.
