In aerospace propulsion and precision stamping, surface and dimensional consistency of materials are just as important as strength. For engineers and purchasing managers, key pain points when sourcing Inconel 625 (UNS N06625) sheet metal include:
Poor flatness: Warping or bending of the sheet metal can damage the laser head, causing costly downtime, especially during automated CNC cutting processes.
Forming cracks: Low-ductility materials are prone to microcracks during complex deep drawing processes in engine cylinder liners or power spinning processes in bellows.
At Gnee Alloy, we eliminate these risks. Our precision Inconel 625 sheet metal is specifically designed for zero-defect manufacturing and maximum structural integrity.
Click to get an Inconel 625 product quote
Performance of precision Inconel 625 alloy sheet in the aerospace field
Performance of precision Inconel 625 alloy sheet in the aerospace field
Precision Inconel 625 alloy sheet is a high-quality nickel-chromium-molybdenum superalloy widely used in the aerospace industry. It is highly favored for its high tensile strength, excellent fatigue resistance, and ability to remain free from precipitation hardening at continuous operating temperatures down to 982°C.
What are the advantages of using Inconel 625?
Inconel 625 is a nickel-chromium superalloy favored for its exceptional strength, excellent corrosion resistance, and high-temperature stability. Engineers rely on Inconel 625 in harsh environments where standard materials are insufficient, such as marine engineering, aerospace, and chemical processing.
1. Inconel 625 (UNS N06625) Sheet Overview
| Parameter | Description |
|---|---|
| Material | Inconel 625 (UNS N06625) |
| Chinese Equivalent | GH3625 |
| Product Form | Aviation Grade Plate (Hot Rolled / Cold Rolled) |
| Material Type | Wrought Nickel-based Corrosion Resistant Superalloy |
| Strengthening Mechanism | Solid-solution strengthening (Mo + Nb) |
| Applicable Standards | AMS 5599, AMS 5869, ASTM B443, GB/T 14995, GB/T 14996 |
| Typical Aviation Applications | Engine exhaust systems, heat shields, thrust reversers, ducting, afterburner components, hydraulic lines |
| Maximum Service Temperature (Load-Bearing) | ~600°C |
| Maximum Service Temperature (Oxidation) | ~980°C |
| Delivery Condition | Solution treated (annealed) – not age-hardenable |
2. Inconel 625 (UNS N06625) Plate chemical composition (wt%) – Aviation Grade
| Element | Content (%) | AMS 5599 / AMS 5869 Requirement | Function |
|---|---|---|---|
| Nickel (Ni) | ≥ 58.0 (Balance) | ≥ 58.0 | Matrix element; corrosion resistance and high-temperature stability |
| Chromium (Cr) | 20.0 – 23.0 | 20.0 – 23.0 | Oxidation and corrosion resistance |
| Molybdenum (Mo) | 8.0 – 10.0 | 8.0 – 10.0 | Core solid-solution strengthening; pitting and crevice corrosion resistance |
| Niobium (Nb) | 3.15 – 4.15 | 3.15 – 4.15 | Solid-solution strengthening; carbide stabilizer |
| Iron (Fe) | ≤ 5.0 | ≤ 5.0 | Residual element |
| Titanium (Ti) | ≤ 0.40 | ≤ 0.40 | Supplementary strengthening |
| Aluminum (Al) | ≤ 0.40 | ≤ 0.40 | Supplementary strengthening |
| Carbon (C) | ≤ 0.10 | ≤ 0.10 | Low carbon for weldability and toughness |
| Manganese (Mn) | ≤ 0.50 | ≤ 0.50 | Deoxidizer |
| Silicon (Si) | ≤ 0.50 | ≤ 0.50 | Deoxidizer |
| Phosphorus (P) | ≤ 0.015 | ≤ 0.015 | Ensures toughness |
| Sulfur (S) | ≤ 0.015 | ≤ 0.015 | Ensures hot workability |
| Cobalt (Co) | ≤ 1.0 | ≤ 1.0 | Residual element |
3. High-Temperature Mechanical Properties of Inconel 625 (UNS N06625) Sheets
| Temp (°C) | Temp (°F) | Tensile Strength (MPa) | Yield Strength (MPa) | Elongation (%) | Strength Retention (%) | Aviation Application |
|---|---|---|---|---|---|---|
| 20 (RT) | 68 | ≥ 830 | ≥ 415 | ≥ 30 | 100% | Ground handling |
| 300 | 572 | ~750 | ~380 | ~35 | 90% | Compressor sections |
| 400 | 752 | ~720 | ~370 | ~38 | 87% | Turbine casings |
| 500 | 932 | ~680 | ~360 | ~40 | 82% | Exhaust systems |
| 550 | 1022 | ~650 | ~350 | ~42 | 78% | Engine ducts |
| 600 | 1112 | ~600 | ~330 | ~45 | 72% | Peak operating temp |
| 650 | 1202 | ~550 | ~300 | ~48 | 66% | Short-term only |
| 700 | 1292 | ~500 | ~270 | ~50 | 60% | Limited exposure |
Click to download the Inconel 625 alloy PDF file now
4. Inconel 625 (UNS N06625) sheet dimensions and specifications – Aviation Grade
Hot Rolled Plate
| Thickness (mm) | Thickness (in) | Width (mm) | Length (mm) | Thickness Tolerance |
|---|---|---|---|---|
| 4.0 – 10.0 | 0.160 – 0.394 | 500 – 1500 | 1000 – 4000 | ±0.20 – ±0.40 mm |
| 10.0 – 20.0 | 0.394 – 0.787 | 500 – 1500 | 1000 – 4000 | ±0.40 – ±0.80 mm |
| 20.0 – 50.0 | 0.787 – 1.969 | 500 – 1500 | 1000 – 4000 | ±0.80 – ±1.50 mm |
Cold Rolled Plate / Sheet
| Thickness (mm) | Thickness (in) | Width (mm) | Length (mm) | Thickness Tolerance |
|---|---|---|---|---|
| 0.5 – 1.0 | 0.020 – 0.039 | 500 – 1200 | 1000 – 2500 | ±0.05 – ±0.08 mm |
| 1.0 – 2.0 | 0.039 – 0.079 | 500 – 1200 | 1000 – 3000 | ±0.08 – ±0.12 mm |
| 2.0 – 4.0 | 0.079 – 0.157 | 500 – 1200 | 1000 – 3000 | ±0.10 – ±0.15 mm |
Flatness (Aviation Grade)
| Thickness (mm) | Flatness Tolerance |
|---|---|
| ≤ 4.0 | ≤ 1.5 mm/m |
| 4.0 – 10.0 | ≤ 2.0 mm/m |
| ≥ 10.0 | ≤ 3.0 mm/m |
Contact us to customize Inconel 625 products to fit your project dimensions
5. Corrosion-resistant Inconel 625 (UNS N06625) sheet – Aviation Critical
| Environment | Resistance Level | Aviation Significance |
|---|---|---|
| Oxidizing Acids (HNO₃) | Excellent | Engine exhaust environments |
| Reducing Acids (H₂SO₄, HCl) | Excellent | Fuel system corrosion |
| Chloride Pitting | Excellent | Marine / coastal operations |
| Chloride Crevice Corrosion | Excellent | Fastener joints, seals |
| Chloride Stress Corrosion Cracking | Excellent | High-stress components |
| High-Temperature Oxidation (to 980°C) | Excellent | Hot section components |
| Sour Gas (H₂S/CO₂) | Excellent | Fuel systems |
Corrosion Resistance Rating (1-5, 5 = best)
| Environment | Inconel 625 |
|---|---|
| Sulfuric Acid | 5 |
| Hydrochloric Acid | 5 |
| Seawater | 5 |
| Chloride SCC | 5 |
| High-Temp Oxidation (980°C) | 5 |
6. Heat treatment of Inconel 625 (UNS N06625) sheet metal for aerospace applications
| Treatment | Temperature | Time | Cooling | Atmosphere | Purpose |
|---|---|---|---|---|---|
| Solution Treatment (Annealing) | 940 – 1040°C | Per thickness | Rapid cool (water or air) | Controlled atmosphere (vacuum or protective gas) | Softening, carbide dissolution |
7. Inconel 625 (UNS N06625) Non-destructive Testing (NDT) for Sheet Metal
| Test Method | Requirement | Standard | Acceptance Criteria |
|---|---|---|---|
| Ultrasonic Testing (UT) | 100% (plate thickness ≥ 6mm) | ASTM E2375 / AMS 2370 | No defects exceeding 0.8mm |
| Eddy Current Testing (ET) | As specified (thin sheet) | ASTM E426 | No relevant indications |
| Liquid Penetrant Inspection (LPI) | As specified | ASTM E1417 | No relevant indications |
| Visual Inspection | 100% | ASTM E543 | No surface defects |
| Flatness Inspection | 100% | - | ≤ 3 mm/m (specified per thickness) |
8. Inconel 625 (UNS N06625) Sheet for aerospace applications
| Component | Operating Temp | Key Requirements | Product Form |
|---|---|---|---|
| Engine Exhaust Systems | 500 – 800°C | Oxidation resistance, thermal fatigue | Plate, sheet |
| Heat Shields | 600 – 900°C | Oxidation resistance, thermal protection | Thin sheet |
| Thrust Reversers | 400 – 700°C | High-temperature strength, corrosion resistance | Plate |
| Ducting | 400 – 600°C | Pressure resistance, formability | Sheet, plate |
| Afterburner Components | 600 – 800°C | Thermal fatigue, oxidation resistance | Sheet, plate |
| Hydraulic Lines | 300 – 500°C | High pressure, corrosion resistance | Tube (from plate) |
| Engine Casings | 400 – 600°C | Structural strength, stability | Plate |
| Flame Holders | 700 – 850°C | High-temperature strength | Sheet |
Why Choose Gnee as Your Nickel-Based Alloy Supplier
✅️AS9100 Certified Factory: Manufactured under the world's highest aviation quality management protocols.
✅️MTC 3.1 Traceability: Full heat-analysis and mechanical property verification certificates included with every batch.
✅️Custom Fabrication: We offer precision Cut-to-Size via laser, waterjet, or plasma cutting to provide ready-to-assemble blanks.
✅️Global Fast Shipping: Large stock of standard aerospace thicknesses (0.5mm to 3.0mm) ready for immediate dispatch.
Gnee Alloy inconel 625 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 625 Alloy Product Packing
Contact us for the latest export price quote for Inconel 625 Alloy
FAQ
Q1: Can your Inconel 625 sheets handle cryogenic temperatures?
A: Yes. Inconel 625 maintains excellent toughness and ductility down to -196°C, making it ideal for liquid nitrogen manifolds and space exploration structural members.
Q2: How do you prevent surface scratching during shipping?
A: All our precision sheets are supplied with double-sided PVC or PE protective film and packed in reinforced, waterproof export wooden crates to ensure your material arrives in Zero-Defect condition.
Q3: Is post-weld heat treatment (PWHT) required for these sheets?
A: Generally, No. Inconel 625 is a solid-solution alloy and retains its high fatigue strength in the as-welded condition. This is a massive Cost-effective Solution for large-scale aerospace manifold assembly.
Q4: Do you support small trial orders for prototype development?
A: Absolutely. As a Reliable Supplier, we support Innovation. We offer Flexible MOQs on our in-stock inventory of bright annealed sheets for your R&D phase.
