Alloy 601 (Inconel 601)
UNS N06601
Overview
Nickel-chromium-iron alloy with aluminum addition for exceptional oxidation resistance up to 1260°C. The aluminum forms a tightly adherent oxide layer that provides outstanding resistance to carburization, sulfidation, and metal dusting — critical performance advantages in petrochemical furnace and reformer applications. Superior to Alloy 600 in high-temperature corrosion resistance.
Chemical Composition (wt%)
| Element | Min | Max |
|---|---|---|
| Ni (Nickel) | 58 | 63 |
| Cr (Chromium) | 21 | 25 |
| Fe (Iron) | 13 | 18 |
| Al (Aluminum) | 1 | 1.7 |
| C (Carbon) | — | 0.1 |
| Mn (Manganese) | — | 1 |
| Si (Silicon) | — | 0.5 |
Mechanical Properties
| Property | Value | Condition |
|---|---|---|
| Tensile Strength | ≥ 550 MPa (80 ksi) | — |
| Yield Strength (0.2%) | ≥ 240 MPa (35 ksi) | — |
| Elongation | ≥ 30% | — |
| Hardness | ≤ 25 HRC | annealed |
| Density | 8.11 g/cm³ | — |
Physical Properties
| Property | Value |
|---|---|
| Melting Range | 1300 – 1370 °C |
| Thermal Conductivity | 11.2 W/m·K (at 23°C) |
| Max Service Temp | 1260°C |
Corrosion Resistance
Outstanding oxidation resistance up to 1260°C — aluminum oxide layer provides protection far beyond standard stainless steels. Excellent resistance to carburization, carbonitriding, and metal dusting in petrochemical environments. Good resistance to sulfidation and molten salts. Not designed for aqueous corrosion — strength is high-temperature gaseous environments.
Typical Applications
Related Standards
Available Products in This Material
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