Are you struggling with high scrap rates or excessive secondary processing costs when using high-temperature nickel alloys? For precision engineering projects involving GH3030 (Nimonic 75 / XH78T), choosing the right material form-cold-rolled sheet or hot-rolled plate-is just as important as the alloy's chemical composition.
Are you wondering: "Will the material warp after laser cutting? Is the surface smooth enough to meet the requirements of aerospace instruments?" As a leading direct-from-factory, Gnee Steel offers tailored precision manufacturing solutions to meet your specific mechanical and dimensional requirements.
Contact our professionals to recommend alloys suitable for your project
Differences in processing between cold-rolled GH3030 thin plate and hot-rolled XH78T thick plate
Differences in processing between cold-rolled GH3030 thin plate and hot-rolled XH78T thick plate
The main differences in processing technology between cold-rolled GH3030 thin plates and hot-rolled XH78T thick plates lie in processing temperature (room temperature vs. high temperature), material thickness, and structural requirements. Cold-rolled GH3030 offers high precision and surface quality, while hot-rolled XH78T provides high-temperature strength and structural toughness.
What is GH3030 material?
GH3030 is a high-temperature nickel-based superalloy primarily used in components requiring high oxidation resistance and thermal stability. Due to its excellent performance in high-temperature environments, GH3030 is widely used in the aerospace and power generation industries.
1. Comparison of GH3030 cold-rolled and hot-rolled XH78T
Cold Rolled GH3030 Sheet (0.5mm - 4.0mm)
The Precision Champion: Our cold-rolling process ensures a Precision Tolerance (within ±0.05mm), making these sheets ideal for stamping, deep drawing, and automated laser cutting.
Surface Excellence: Available in Bright Annealed (BA) finish. This mirror-like, scale-free Surface Quality is a requirement for high-purity aerospace combustion chamber liners and heat shields.
Best For: Lightweight, intricate components that require high plasticity and zero surface imperfections.
Cold Rolled GH3030 Sheet VS Hot Rollel GH3030 Plate
Hot Rolled GH3030 Plate (5.0mm - 50.0mm)
The Structural Workhorse: For heavy-duty industrial furnace baffles, baffles, and structural framing, Hot Rolled Plates provide the necessary mass and thermal stability.
Structural Stability: Hot rolling refines the grain structure for thick sections, ensuring the material doesn't warp during high-heat welding or heavy mechanical loading.
Custom Sizes: We offer Precision Cutting (Waterjet and Plasma) to provide Custom Sizes directly from our Large Scale Factory, reducing your in-house prep time.
Click to view detailed information about our GH3030 sheet material manufacturing process
2. Chemical and mechanical properties of cold-rolled GH3030 and hot-rolled XH78T
Chemical Composition (Weight %)
| Element | GH3030 Base | Key Performance Role |
| Nickel (Ni) | Balance (~80.0%) | Oxidation Resistance & Ductility |
| Chromium (Cr) | 19.0 - 22.0% | High-Temp Corrosion Barrier |
| Titanium (Ti) | 0.15 - 0.35% | Carbide Stability |
| Iron (Fe) | ≤ 1.5% | Minimizing Impurity Phase |
Mechanical Properties (Solution Annealed)
| Property | Cold Rolled Sheet | Hot Rolled Plate |
| Tensile Strength (σbσb) | ≥ 735 MPa | ≥ 700 MPa |
| Yield Strength (σ0.2σ0.2) | ≥ 245 MPa | ≥ 240 MPa |
| Elongation (δ5δ5) | ≥ 35% | ≥ 30% |
| Tolerance Range | ± 0.05mm to 0.1mm | ± 0.3mm to 1.5mm |
Click to download GH3030 chemical composition PDF
3.Summary of Differences
| Feature | Cold-Rolled GH3030 (Thin) | Hot-Rolled XH78T (Thick) |
|---|---|---|
| Process Temp | Room Temperature | Above Recrystallization |
| Thickness | Generally thin (< 4mm) | Generally thicker (6-80mm) |
| Surface | Smooth, clean, shiny/matte | Scaled, rough, dark |
| Tolerance | Very high accuracy | Lower accuracy (shrinkage) |
| Mechanical | Higher strength, less ductile | Higher plasticity, good toughness |
| Structure | Grain deformation (work hardening) | Recrystallized grain structure |
4. Why Choose Gnee Steel?
As your supply chain partner, Gnee Steel simplifies your precision manufacturing process:
Factory Wholesale Prices: Sourcing directly from the source saves you 20-40% compared to international distributors.
Custom Cutting Services: We can provide pre-cut blanks, discs, or complex profiles (ready-to-use parts) based on your drawings.
Full Certification: Every order comes with a material testing certificate (EN 10204 3.1) and complies with XH78T and Nimonic 75 standards.
GH3030 Certificate
Contact us now to get the latest export price for GH3030 in 2026
FAQ
Q1: Which form is better for CNC machining?
A: For CNC milling of thick parts, Hot Rolled Plates are preferred as they are more dimensionally stable in thick sections. For stamping or high-speed CNC punching, Cold Rolled Sheets are the industry standard due to their Precision Tolerance.
Q2: Does the "Bright Annealed" finish affect the price of cold rolled sheets?
A: Yes, it is a premium Surface Quality finish that involves heat treatment in a controlled hydrogen atmosphere. However, it significantly reduces your secondary polishing and cleaning costs, making it a more Cost-Effective Solution overall.
Q3: Can you provide custom thicknesses (e.g., 4.5mm) that fall between sheet and plate?
A: Absolutely. As a Direct Factory, we can perform custom rolling or precision grinding to meet your exact Custom Sizes requirements for specialized aerospace projects.
Q4: How do you handle surface protection during shipping?
A: Cold rolled sheets are typically coated with anti-rust oil and separated by paper or plastic film. Hot rolled plates are packed in reinforced wooden crates to ensure they arrive at your facility in Premium Quality condition.
