In the demanding field of aerospace sheet metal fabrication, the plasticity of materials determines the success or failure of the final part. As a professional manufacturer of GH3030 sheet metal, we produce highly formable cold-rolled sheet metal (0.5mm - 3.0mm) specifically designed for aerospace combustion chamber liners, burner components, and exhaust systems. Our GH3030 sheet metal is an ideal alternative to EI435 (ЭИ435), designed for perfect stamping, deep drawing, and high-integrity welding, and can be used to manufacture complex, high-temperature components.
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Manufacturing process of GH3030 high temperature alloy precision cold-rolled sheet
Manufacturing process of GH3030 high temperature alloy precision cold-rolled sheet
The manufacturing process of GH3030 high-temperature alloy precision cold-rolled sheet is a complex multi-stage production process designed to achieve high surface quality, tight dimensional tolerances, and excellent high-temperature performance, typically used below 800℃. GH3030 is an 80Ni-20Cr solid solution strengthened nickel-based alloy, highly favored for its good stability, excellent weldability, and strong oxidation resistance.
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.
Cold-rolled GH3030 sheet (precision machining)
Process: Pickled hot-rolled coils are cold-rolled at room temperature or slightly below room temperature to achieve the final thickness (e.g., 0.1 mm to 5 mm).
Precision: To achieve high precision, specialized rolling mills (e.g., Sendzimir mills or tandem mills) are required to control high rolling pressures and ensure consistency in sheet thickness, flatness, and surface finish.
Thinning and Annealing: This process typically involves multiple cold rolling cycles with intermediate annealing during cold rolling to eliminate internal stress, improve ductility, and obtain the desired grain structure, ultimately thinning the sheet to the final thickness.
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1. Mechanical properties of Gnee Steel GH3030 (annealed state)
| Property | GH3030 / EI435 / Nimonic 75 | Impact on Fabrication |
| Tensile Strength (Rm) | ≥ 685 MPa | High strength in 800°C service |
| Yield Strength (Rp0.2) | ≥ 275 MPa | Lower forming force required |
| Elongation (A5) | ≥ 35% (Typical 40-45%) | Excellent Deep-Drawing ability |
| Hardness (HBW) | ≤ 200 | Protects your stamping dies |
2. Chemical composition (%) of Gnee Steel GH3030 steel plate
| Essential Chemical Composition (%) | Value |
|---|---|
| Nickel (Ni) | Balance (≥ 75.0%) |
| Chromium (Cr) | 19.0 - 22.0% |
| Titanium (Ti) | 0.15 - 0.35% |
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3. Advantages of Gnee Steel GH3030 Sheet Metal
We are more than just rolled metal; we are dedicated to optimizing metal processing to better suit your needs. Our GH3030 high-temperature alloy supply focuses on three key "formability pillars":
Ultra-high elongation (A5 ≥ 35%): We rigorously control cold rolling and annealing processes to ensure maximum sheet ductility, enabling deep drawing and preventing surface tearing or cracking.
Precise thickness tolerance: Our cold-rolled sheet production line utilizes AGC (Automatic Thickness Control) technology to ensure consistent sheet thickness, crucial for automated welding and uniform heat distribution.
Advanced cutting services: We offer precision laser and waterjet cutting services to save you production line time. We can provide near-net-shape billets based on your engineering drawings.
4. Comparison of GH3030 and GH3044 (EI602) sheet materials
| Feature | GH3030 (Our Specialty) | GH3044 (Alternative) |
| Primary Strength | Solid Solution (Ni-Cr-Ti) | Solid Solution (Ni-Cr-W-Mo) |
| Stamping Ease | High (Superior Elongation) | Medium (W/Mo makes it stiffer) |
| Welding Stability | Excellent (Stable Austenite) | Good (Requires more heat control) |
| Cost Efficiency | Highest ROI for 800°C | Higher price due to W/Mo |
Verdict: For components requiring complex cold-forming and stamping (like flame tubes), GH3030 is the most cost-effective and reliable choice.
Contact our professionals to recommend alloys suitable for your project
FAQ
Q1: Can your GH3030 plates handle 800°C long-term service?
A: Yes. GH3030 is the industry standard for 800°C non-load-bearing parts. Its stable microstructure prevents grain coarsening, ensuring the sheet remains ductile and doesn't become brittle even after thousands of hours of service.
Q2: Do you provide MTC 3.1 for all sheet shipments?
A: Absolutely. As an aerospace-certified superalloy factory, every sheet is marked with a heat number and supplied with a full EN 10204 3.1 Mill Test Certificate (MTC), documenting chemical and mechanical validation.
Q3: What is the typical surface finish of your GH3030 cold-rolled sheets?
A: We offer Bright Annealed (BA) for a mirror-like finish (ideal for precision stamping) or Annealed & Pickled (AP) for general industrial fabrication.