Inconel 600 vs 625 vs 718 Plates and Sheets – Complete Comparison Guide
The choice of the appropriate nickel alloy is an important factor in the industrial safety and performance. The most common analysis that engineers do is the inconel 600 vs 625 and or inconel 625 vs 718 to establish the material that is most suitable to deal with extreme conditions. This is a guide that subdivides the exact difference between the inconel 600 vs 625 vs 718 when buying Inconel plates and sheets.
The decision of nickel superalloys determines the success of a project in high temperature. Alloy 600 plate, alloy 625 plate and alloy 718 plate are compared by engineers due to the fact that they have different advantages in terms of heat and corrosion resistance. The plates and sheets of Inconel 600 are used in general heat purposes and 625 and 718 are used in more special stress. These ingot plates and these pieces of ingot sheets are of high international standards that we produce. Inconel 600 plates and sheets are among the most used and popular materials in furnace components. This comparison of inconel will assist you to choose the right grade.
This table summarizes the performance of Inconel 600 plates, Inconel 625 plates, and Inconel 718 plates.
| Feature | Inconel 600 | Inconel 625 | Inconel 718 |
| Tensile Strength | Moderate | High | Very High |
| Temperature Resistance | Excellent (Oxidation) | Very Good | Excellent (Creep) |
| Corrosion Behavior | Good (General) | Excellent (Marine) | Good |
| Weldability | Good | Excellent | Good (Resists cracking) |
| Cost Tier | Medium | High | High |
| Thickness Availability | 0.5mm – 50mm+ | 0.5mm – 50mm+ | 0.8mm – 25mm+ |
Buyers often ask about inconel sheet vs plate. Sheets are generally thinner than 6mm while plates are thicker.
What Is Inconel? Why These Grades Are Popular
This is an alloy family of nickel-chromium-molybdenum superalloy. Manufacturers make such materials to resist extreme conditions in which a normal steel collapses. They offer superior oxidation strength and retain their strength at high temperatures.
Nickel alloy plates are used in industries due to their creep and corrosion resistance. The high temperatures alloy preferred most is Grade 600, 625 and Grade 718. They are dependable in chemical processing plants and in jet engines.
Inconel 600 Plates and Sheets Overview
Inconel 600 is a standard engineering material for applications requiring resistance to heat and corrosion.
Key Properties of Inconel 600
This alloy is a non-magnetic nickel-chromium blend. It offers high mechanical properties and combines high strength with good workability. It resists chloride-ion stress corrosion cracking.
Performance in Plates and Sheets
Typical Applications of Inconel 600
Inconel 600 Data Sheet Snippet
| Element | Content % |
| Nickel | 72.0 min |
| Chromium | 14.0 – 17.0 |
| Iron | 6.0 – 10.0 |
View Inconel 600 plates and sheets for full specifications.
Inconel 625 Plates and Inconel 625 Sheets Overview
Inconel 625 has a reputation of high strength and excellent corrosion resistance that is non-heat treated.
Key Properties of Inconel 625
The addition of molybdenum and niobium is carried out to harden the alloy matrix. This provides high tensile strength and is not by means of precipitation hardening. Inconel 625 data sheet values show that it has higher fatigue strength.
Plate and sheet form Corrosion Performance
Applications of Inconel 625
Inconel 718 Plates and Inconel 718 Sheets Overview
Inconel 718 is a precipitation-hardenable nickel-chromium alloy designed for high stress.
Key Properties of Inconel 718
This grade has large quantities of niobium, molybdenum and titanium. It has a very high tensile strength. Inconel 718 data sheet brings out the fact that it has a resistance to creep-rupture.
Applications of Inconel 718 in Plate & Sheet Form
Inconel 718 sheet is used in gas turbine engine parts and liquid fuel rockets. 718 sheet is also found in cryogenic storage tanks.
Inconel 718 plates and sheets are available for high-stress projects.
Chemical Composition Comparison
| Element | Inconel 600 | Inconel 625 | Inconel 718 |
| Nickel | 72.0% min | 58.0% min | 50.0 – 55.0% |
| Chromium | 14.0 – 17.0% | 20.0 – 23.0% | 17.0 – 21.0% |
| Molybdenum | — | 8.0 – 10.0% | 2.8 – 3.3% |
| Niobium | — | 3.15 – 4.15% | 4.75 – 5.5% |
Mechanical Properties Comparison
| Property | Inconel 600 | Inconel 625 | Inconel 718 (Aged) |
| Tensile Strength (MPa) | 550 min | 827 min | 1240 min |
| Yield Strength (MPa) | 240 min | 414 min | 1034 min |
| Elongation (%) | 30 | 30 | 12 |
| Max Working Temp | 2150°F | 1800°F | 1300°F (High Strength) |
Inconel 600 vs 625 vs 718 – Detailed Comparison
- Temperature Resistance: Inconel 718 high temperature behavior is concerned with load strength. It can withstand stress more than 625. But Inconel 600 has a higher temperature resistance to oxidation than 718 but of lower strength. In the inconel 625 vs 718 controversy, 718 takes the contest regarding creep strength.
- Corrosion Resistance : The better corrosion sheet is Inconel 625 sheet. It can withstand pitting and crevice corrosion more than 600 and 718. This nickel alloy is essential in offshore platforms and this is a corrosion resistant alloy.
- Strength & Hardness: Connel 625 vs 718 of strength, the latter is the winner. Alloy 718 plate may also be age-hardened to much higher levels than 625.
- Weldability and Fabrication : An interesting comparison is between inconel 625 and inconel 718 weldability. 625 is highly weldable. 718 is created to resist cracking that occurs after welding. The difference between Inconel 600 and 625 implies that 600 is easier to work with but 625 has better welded joints.
- Cost Comparison : Price is a major factor. Prices of Inconel plate are different depending on its grade. Inconel 600 is the cheapest in general. The price of Inconel 625 plate is higher because of Molybdenum and 718 is normally the most expensive because of processing requirements.
- Plate and Sheet Availability : Inconel grade 600 and 625 sheets are readily available in the market, whereas 718 sheet material is occasionally scarce as it has only been used in aerospace.
Which Grade Should You Choose?
- Choose Inconel 600 if you need general heat resistance and moderate corrosion protection at a lower cost. It suits furnace parts best.
- Choose Inconel 625 for marine or chemical environments. It prevents pitting and rust better than the others.
Choose Inconel 718 for extreme stress and high loads. Use this for aerospace parts where material failure is not an option.
Reviewing inconel 600 vs 625 vs 718 ensures you do not overpay for properties you do not need.
The Bottom Line: Choosing Your Superalloy
The decision between the plates of the alloy of inconel and the sheets is your environment. Inconel 600 handles heat. Inconel 625 handles corrosion. Inconel 718 handles stress. Nickel alloy plates are a long term investment.
Stellar Alloys is the leading Inconel sheet and plate manufacturer. So, for superior corrosion resistance in marine environments, we recommend exploring our Inconel 625 plates and sheets.
FAQs
This is primarily the difference of composition and strength. 600 is Ni-Cr-Fe because of general heat. 625 is Ni-Cr-Fe with add-on of Mo because of corrosion. 718 is Ni-Cr-Fe with add-on of Nb because of maximum strength.
Oxidation Inconel 600 is the most temperature resistant (2150degF). However, Inconel 718 is the strongest in high temperature (up to 1300degF).
Yes. All grades resist corrosion. Inconel 625 is the most corrosive resistant in this case, the pitting and crevices in seawater.
Inconel 625 is used in the processing of chemicals as well as the marine shafts. Inconel 718 is used in jet engines, gas turbine and rockets engines.
The cheapest is usually Inconel 600. Inconel 625 is mid-to-high tier. Inconel 718 which is produced in complicated methods is usually the most expensive and are generally best suited to high temperatures.
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