Inconel 600 is well suited for high temperature applications because it maintains its mechanical properties and corrosion resistance at high temperatures. Monel 400, on the other hand, is more suitable for cryogenic environments where corrosion resistance and ductility are critical.
01
What is the ASTM grade for Monel 400?
ASTM B127 is the standard specification for plate, sheet, and strip of the nickel-copper alloy Monel 400 (UNS N04400). Monel 400 material offered by Gnee Steel is available in either hot-rolled or cold-rolled forms and is further classified by thickness.
02
What is the composition of Inconel 600?
To be called Nickel Alloy 600 (Inconel 600), the alloy must contain the following chemical properties: Ni 72%, Cr 14-17%, Fe 6-10%
03
Does Inconel 600 rust?
It has excellent resistance to high-purity water corrosion, and no signs of chloride ion stress corrosion cracking were detected in the reactor water system.
04
Does Monel 400 rust?
Monel 400 is a nickel-copper alloy whose general properties include good corrosion resistance, good weldability, and medium to high strength. It can withstand attack by hot seawater and steam, as well as alkaline solutions and salts.
Inconel 600 vs Monel 400 – What's the Difference?
monel 400 vs Inconel 600 Chemical Composition
| Element | 400 | 600 |
|---|---|---|
| C (Carbon) | ≤ 0.30% | ≤ 0.15% |
| Cr (Chromium) | 14.0% ~ 17.0% | Not required |
| Cu (Copper) | 28.0% ~ 34.0% | ≤ 0.50% |
| Fe (Iron) | ≤ 2.5% | 6.0% ~ 10.0% |
| Mn (Manganese) | ≤ 2.00% | ≤ 1.00% |
| Ni (Nickel) | ≥ 63.0% | ≥ 72.0% |
| S (Sulfur) | ≤ 0.024% | ≤ 0.015% |
| Si (Silicon) | ≤ 0.50% | ≤ 0.50% |
monel 400 vs Inconel 600 Corrosion Resistance
| Element | 400 | 600 |
|---|---|---|
| Ni (Nickel) | ≥ 63.0% | ≥ 72.0% |
| Cu (Copper) | 28.0% ~ 34.0% | ≤ 0.50% |
| Cr (Chromium) | 14.0% ~ 17.0% | 14.0% ~ 17.0% |
Both Monel 400 and Inconel 600 have very excellent corrosion resistance, but their corrosion resistance principles are different.
The corrosion resistance of 400 alloy mainly comes from copper. Copper has corrosion resistance that most metals do not have at room temperature, especially in flowing seawater. This corrosion resistance makes Monel 400 irreplaceable in marine applications. However, copper is very easy to oxidize at high temperatures, so Monel 400 is rarely used in high-temperature corrosion-resistant applications.
The corrosion resistance of Inconel 600 mainly comes from chromium. Chromium itself can be oxidized, but after oxidation, chromium oxide will form a protective film on the surface of the alloy. This protective film isolates the oxide from the alloy, thereby preventing the alloy from further oxidation. This anti-oxidation effect is also effective at high temperatures.
| Monel 400 | Inconel 600 | |
|---|---|---|
| Density, g/cm³ | 8.80 | 8.47 |
| Density, lb/in.³ | 0.318 | 0.306 |
| Melting Range, °F | 2370-2460 | 2470-2575 |
| Melting Range, °C | 1300-1350 | 1354-1413 |
| Curie Temperature, °F | 70-120 | -192 |
| Curie Temperature, °C | 21-49 | -124 |
Conclusion
Gnee Steel is a supplier of Inconel 600 and Monel 400, including tubes, pipes, plates, strips, plates, round bars, flat bars, forged billets, hexagons, wire and extrusions. We work with steel mills to provide customers with 625 alloy, and its products meet or exceed many leading industry standards, including ASTM, ASME, SAE, AMS, ISO, DIN, EN and BS standards.
Gnee Steel stocks and sells Inconel 600 and Monel 400 tubes, pipes, plates, strips, plates, round bars, flat bars, forged billets, hexagons, wire and extrusions. You are welcome to contact us for a quote at any time at ss@gneesteel.com
