Alloy 600 (Inconel 600)
UNS N06600
Overview
Nickel-chromium-iron alloy with excellent oxidation resistance up to 1093°C. The high nickel content (72% min) provides outstanding resistance to caustic alkalis and chloride stress corrosion cracking. One of the most widely used nickel alloys for thermal processing, chemical process equipment, and nuclear applications. Standard material for steam generator tubing in pressurized water reactors.
Chemical Composition (wt%)
| Element | Min | Max |
|---|---|---|
| Ni (Nickel) | 72 | — |
| Cr (Chromium) | 14 | 17 |
| Fe (Iron) | 6 | 10 |
| C (Carbon) | — | 0.15 |
| Mn (Manganese) | — | 1 |
| Si (Silicon) | — | 0.5 |
| Cu (Copper) | — | 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 | 8.42 g/cm³ | — |
Physical Properties
| Property | Value |
|---|---|
| Melting Range | 1370 – 1425 °C |
| Thermal Conductivity | 14.9 W/m·K (at 23°C) |
| Max Service Temp | 1093°C |
Corrosion Resistance
Outstanding resistance to caustic alkalis (NaOH, KOH) at all concentrations and temperatures — the benchmark alloy for caustic service. Excellent resistance to chloride stress corrosion cracking due to high nickel content. Good resistance to dry halogens and reducing acids. Susceptible to sensitization when exposed to sulfur-containing environments above 315°C. Not recommended for nitric acid or strong oxidizing environments.
Typical Applications
Related Standards
Available Products in This Material
Browse our product range manufactured in Alloy 600 (Inconel 600):