In global aerospace, nuclear, and energy projects, any mistake in material selection can result in millions of dollars in losses. For procurement managers and engineers, a major pain point lies in discrepancies in material labeling.
We hear questions like, "My blueprints specify EI435, a design rooted in Russian tradition, but my Tier 1 supplier is offering GH3030. Are they really identical? Will my project pass review?"
GH3030 is identical to these international standard grades, designed according to the same metallurgical principles. At Gnee Alloy, we provide certified materials that ensure structural integrity and industrial durability, eliminating your "substitution anxiety."
Click to get a GH3030 product quote
Equivalent grades of GH3030 | Nimonic 75 and XH78T Technology Replacement Guide
Equivalent grades of GH3030 | Nimonic 75 and XH78T Technology Replacement Guide
GH3030 is a solid solution strengthened superalloy (GB) produced in China, mainly used in turbine combustion chambers, afterburners, and other high-temperature components. It is known for its excellent oxidation resistance and thermoplasticity up to 800℃.
What is GH3030 material?
GH3030 is a high-temperature nickel-based alloy, renowned for its excellent oxidation resistance, good thermal stability, and high-strength mechanical properties at high temperatures.
1. GH3030 Global Equivalence Comparison Table
| Region / System | Technical Standard | Designation | Material Status |
| China (National) | GB/T 14992 / 15062 | GH3030 / GH30 | Certified Standard |
| UK / USA | Nimonic 75 / Alloy 75 | UNS N06075 | Direct Equivalent |
| Russia (GOST) | GOST 5632 / 24950 | XH78T / EI435 | Historical Origin |
| Europe (EN) | DIN 17750 / 17752 | W.Nr. 2.4951 | Industrial Match |
| International | Aviation / Nuclear | NiCr20Ti | Chemical Basis |
2. Chemical composition of GH3030 alloy (wt%)
| Element | Content (%) | Notes |
|---|---|---|
| Nickel (Ni) | Balance (≥ 75.0) | Matrix; high-temperature stability |
| Chromium (Cr) | 19.0 – 22.0 | Oxidation and corrosion resistance |
| Iron (Fe) | ≤ 1.5 | Strictly controlled to maintain Ni-base characteristics |
| Titanium (Ti) | 0.15 – 0.35 | Supplementary solid-solution strengthening |
| Aluminum (Al) | ≤ 0.15 | Prevents harmful phase formation |
| Carbon (C) | ≤ 0.12 | Ensures 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. High-temperature mechanical properties of GH3030 alloy (typical values)
| Temp (°C) | Rm (MPa) | Rp0.2 (MPa) | A (%) | 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 |
| 700 | ~450 | ~220 | ~40 | 66 |
| 800 | ~350 | ~180 | ~42 | 51 |
| 900 | ~250 | ~120 | ~45 | 36 |
4. GH3030 alloy 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 |
5. GH3030 Alloy Properties
GH3030 can be a risk-free alternative to Nimonic 75 or EI435 due to its atomic balance. These alloys all possess a stable austenitic matrix and are optimized for operating temperatures up to 800°C (1472°F).
Chemical Stability: All these alloys are based on a matrix of approximately 75% nickel and 20% chromium.
Titanium Stabilizing Effect: Controlled addition of titanium (Ti) acts as a grain stabilizer, preventing rapid grain growth and thus avoiding warping in lower-grade alloys.
Superior Machining Performance: They all share the same cold-working properties and "easy-to-weld" characteristics, enabling seamless custom machining of aerospace bushings.
Why Choose Gnee as Your Nickel-Based Alloy Supplier
✅️VIM + ESR Melting: Our dual-vacuum refining process ensures ultra-low trace impurities (P, S < 0.010%), which often exceeds the purity requirements of original legacy blueprints.
✅️MTC 3.1 Traceability: Full EN 10204 3.1 documentation included, documenting heat analysis and mechanical performance at room and elevated temperatures.
✅️Wholesale Inventory: Large stock of Seamless Tubes, Round Bars, and Sheets ready for Fast Global Shipping.
Audit Support: We provide technical compliance documents to help your engineering team approve the substitution with 100% confidence.
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 safe for aero-engine repairs originally calling for Nimonic 75?
A: Yes. GH3030 is manufactured to the same metallurgical envelope. For MRO (Maintenance, Repair, and Overhaul) programs, we provide certified materials that meet the original tensile and oxidation thresholds required by aviation authorities.
Q2: Does using the Chinese designation GH3030 affect my project's insurance?
A: Not if provided with a technical equivalency certificate and MTC 3.1 traceability. Most global insurance and safety boards accept equivalent materials provided the chemical and mechanical parity is verified.
Q3: Can I weld GH3030 to existing Inconel 600 or Nimonic 75 parts?
A: Absolutely. They have excellent metallurgical compatibility. We recommend using ERNiCr-3 filler metal to ensure a stable, crack-free joint.
Q4: Do you offer bulk discounts for petrochemical refinery projects?
A: Yes. As a Reliable Supplier for large-scale energy programs, we provide attractive tiered Wholesale Pricing and long-term supply contracts.
