What is the difference between Monel 405 and 400?
Monel R405 has the same composition as Monel 400, but with sulfur added. The added sulfur acts as a chipbreaker during machining, making it more machinable than grade 400. The alloy also has excellent strength, corrosion resistance, and weldability.
Will Monel 400 rust?
Monel 400 is a nickel-copper alloy characterized by good corrosion resistance, good weldability, and medium to high strength. It also resists attack by hot seawater and steam, as well as alkaline solutions and salts.
What is Monel 405 made of?
Monel 405 is typically made up of about 63% nickel and 28-34% copper. It also contains small amounts of carbon, iron, manganese, silicon, and sulfur.
What is the composition of 405 grade steel?
405 is a 12% chromium steel designed for use in a welded state. Unlike other 12% chromium steels, it does not harden significantly by air cooling at high temperatures.
Monel 400 vs. Monel R-405 Chemical Composition
| Element | Monel 400 | Monel R-405 | Key Differences |
|---|---|---|---|
| Nickel (Ni) | ≥ 63.0% | ≥ 63.0% | Identical |
| Copper (Cu) | 28.0 - 34.0 | 28.0 - 34.0 | Identical |
| Manganese (Mn) | ≤ 2.00 | ≤ 2.00 | Identical |
| Iron (Fe) | ≤ 2.5 | ≤ 2.5 | Identical |
| Sulfur (S) | ≤ 0.024 | 0.025 - 0.060 | R-405 has intentionally higher S for machinability |
| Silicon (Si) | ≤ 0.50 | ≤ 0.50 | Identical |
| Aluminum (Al) | Not specified (0) | Not specified (0) | Identical (neither contains Al) |
| Titanium (Ti) | Not specified (0) | Not specified (0) | Identical (neither contains Ti) |
Monel 400 vs. Monel R-405 Properties Comparison
| Property | Monel 400 | Monel R-405 | Notes |
|---|---|---|---|
| Density (g/cm³) | 8.8 | 8.8 | Identical |
| Curie Temperature (°C) | 21 - 49 | 28 - 34 | Different ranges |
| Electrical Resistivity 100°C (µΩ·m) | 0.537 | 0.537 | Identical (Annealed) |
| Thermal Linear Expansion 100°C (µm/m·°C) | 14.2 | 14.2 | Identical (Annealed) |
| Thermal Conductivity 100°C (W/m·°C) | 24 | 24 | Identical (Annealed) |
| Specific Heat 100°C (J/kg·°C) | 445 | 445 | Identical (Annealed) |
Monel 400 vs. Monel R-405 Mechanical Properties Comparison
| Property | Monel 400 | Monel R-405 | Key Differences |
|---|---|---|---|
| Hardening Method | Cold drawn & stress relieved | As cold drawn | R-405 uses simpler cold drawing process |
| Tensile Strength (MPa) | 579 - 827 | 586 - 793 | Similar range, 400 has slightly higher max |
| Yield Strength (0.2% Offset) (MPa) | 379 - 690 | 345 - 724 | R-405 has wider range and lower minimum |
| Elongation (%) | 22 - 40 | 15 - 35 | R-405 has lower elongation capability |
| Hardness (Rockwell) | 20 - 85 B | 23 - 85 B |
Similar range, R-405 has higher minimum |
Gnee Steel is a supplier of Monel 405 And 400 alloy, including tubes, pipes, plates, strips, plates, round bars, flat bars, forged billets, hexagons, wire and extruded profiles. 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 Monel 405 And 400 alloy tubes, pipes, plates, strips, plates, round bars, flat bars, forged billets, hexagons, wire and extruded profiles. You are welcome to contact us for a quote at any time at ss@gneesteel.com
