Inconel Alloys
Inconel 601 (UNS N06601) — Composition, Properties & Supply
Inconel 601 (UNS N06601) raises the chromium level of 600 and adds 1.0–1.7% aluminium, producing a dense Cr₂O₃/Al₂O₃ scale that resists oxidation to 1250 °C. It excels against carburisation and cyclic oxidation, making it a first choice for heat-treating and petrochemical cracking furnaces.
What is the chemical composition of Inconel 601?
| Element | Symbol | Content (wt%) |
|---|---|---|
| Ni | Ni | 58.0–63.0 |
| Cr | Cr | 21.0–25.0 |
| Al | Al | 1.00–1.70 |
| Fe | Fe | 7.7–17.4 |
| C | C | ≤ 0.10 |
| Mn | Mn | ≤ 1.00 |
| Si | Si | ≤ 0.50 |
| Cu | Cu | ≤ 1.00 |
| S | S | ≤ 0.015 |
Values are typical specification limits. Actual heat analysis is reported on the EN 10204 3.1 mill test certificate supplied with each shipment.
What are the mechanical properties of Inconel 601?
| Property | Value | Note |
|---|---|---|
| Tensile strength | ≥ 600 MPa | Room temperature |
| Yield strength (0.2% offset) | ≥ 300 MPa | Room temperature |
| Elongation | ≥ 30 % | Gauge length 50 mm / 4D |
| Hardness | ≤ 190 HB | Brinell / Rockwell |
What are the physical properties of Inconel 601?
| Property | Value |
|---|---|
| Density | 8.11 g/cm³ |
| Melting range | 1320–1370 °C |
| Thermal conductivity | 11.2 W/m·K |
| Elastic modulus | 206 GPa |
| Maximum service temperature | 1250 °C (oxidation resistant) |
What are the key characteristics of Inconel 601?
- Oxidation resistance to 1250 °C with excellent spall resistance
- High chromium plus aluminium resists carburisation and nitriding
- Withstands sulphidising atmospheres and thermal fatigue
- Retains useful strength and weldability at temperature
Where is Inconel 601 used?
- Radiant tubes, rollers, muffles and fixtures for heat-treat furnaces
- Petrochemical cracking and reformer furnace components
- Industrial burners, flare tips and exhaust systems
- Waste incineration and heat-treat baskets
- Glass and ceramic kiln furniture
Which standards and specifications cover Inconel 601?
What product forms are available?
Frequently asked questions
What is the advantage of Inconel 601 over 600?
601 raises chromium to 21–25% and adds 1.0–1.7% aluminium, lifting oxidation resistance from about 1095 °C (600) to 1250 °C with markedly better carburisation and thermal-fatigue performance. Choose 601 when service exceeds 900 °C or carburising atmospheres are present.
How does Inconel 601 behave in sulphidising atmospheres?
601 performs well in oxidising sulphur-bearing gases, but nickel forms low-melting eutectics with sulphur, so reducing high-sulphur (low-oxygen) environments require careful evaluation — consider high-chromium iron-base alloys or a service simulation test.
Need Inconel 601 bar, tube, plate or forgings?
Send the grade, dimensions, standard and quantity. We answer within 10 minutes on working days and quote within 24 hours, with EN 10204 3.1 certification.
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