Overview
Inconel 600 is a nickel-chromium alloy renowned for its exceptional high-temperature strength, oxidation resistance, corrosion resistance, and durability in extreme environments. With a high nickel content and significant chromium addition, Inconel 600 maintains mechanical integrity across a wide temperature range and resists attack from many corrosive media.
Inconel 600 is widely used in:
- Aerospace Components
- Heat Treatment Equipment
- Chemical Processing Systems
- Nuclear Engineering
- Furnace Components
- Power Generation Equipment
- Marine Applications
- Industrial Heating Systems
Because of its outstanding resistance to oxidation and corrosion at elevated temperatures, Inconel 600 is one of the most widely used nickel-based superalloys.
Material Specification
| Property | Value |
|---|---|
| Material Designation | Inconel 600 |
| UNS Number | N06600 |
| Werkstoff Number | 2.4816 |
| ASTM Standards | ASTM B168, B166, B163, B167 |
| Material Family | Nickel-Chromium Alloy |
| Density | 8.47 g/cm³ |
| Magnetic Property | Non-Magnetic (Annealed) |
| Typical Supply Condition | Annealed |
| Standard Forms | Plate, Sheet, Bar, Rod, Tube, Pipe, Wire, Forgings |
Chemical Composition
| Element | Content (%) |
|---|---|
| Nickel (Ni) | ≥72.0 |
| Chromium (Cr) | 14.0–17.0 |
| Iron (Fe) | 6.0–10.0 |
| Carbon (C) | ≤0.15 |
| Manganese (Mn) | ≤1.00 |
| Silicon (Si) | ≤0.50 |
| Copper (Cu) | ≤0.50 |
| Sulfur (S) | ≤0.015 |
The high nickel content provides excellent resistance to chloride stress corrosion cracking, while chromium enhances oxidation resistance.
Mechanical Properties
Annealed Condition
| Property | Value |
|---|---|
| Tensile Strength | ≥550 MPa |
| Yield Strength (0.2%) | ≥240 MPa |
| Elongation | ≥30% |
| Hardness | 150–200 HB |
| Elastic Modulus | 207 GPa |
Typical Mechanical Performance
| Property | Value |
|---|---|
| Fatigue Resistance | Excellent |
| Impact Toughness | Excellent |
| Creep Resistance | Excellent |
| Ductility | Excellent |
Physical Properties
| Property | Value |
|---|---|
| Density | 8.47 g/cm³ |
| Melting Range | 1354–1413°C |
| Thermal Conductivity | 14.9 W/m·K |
| Electrical Conductivity | 1.4% IACS |
| Electrical Resistivity | 1.03 μΩ·m |
| Thermal Expansion Coefficient | 13.3 × 10⁻⁶/K |
| Specific Heat Capacity | 444 J/kg·K |
High Temperature Performance
| Property | Performance |
|---|---|
| Oxidation Resistance | Excellent |
| Carburization Resistance | Excellent |
| Nitriding Resistance | Excellent |
| Service Temperature | Up to 1175°C |
Inconel 600 retains strength and corrosion resistance in continuous high-temperature service.
Strength-to-Weight Ratio
| Material | Density (g/cm³) | Tensile Strength |
|---|---|---|
| Inconel 600 | 8.47 | 550 MPa |
| 316L Stainless Steel | 8.00 | 485 MPa |
| Inconel 625 | 8.44 | 827 MPa |
| Inconel 718 | 8.19 | 1240 MPa |
Corrosion Resistance
| Environment | Performance |
|---|---|
| Fresh Water | Excellent |
| Seawater | Excellent |
| Chloride Solutions | Excellent |
| Alkaline Environments | Excellent |
| Organic Acids | Excellent |
| Oxidizing Acids | Good |
Inconel 600 is particularly resistant to chloride-ion stress corrosion cracking.
Recommended surface treatments:
- Pickling
- Passivation
- Electropolishing
- Mechanical Polishing
Oxidation Resistance
| Temperature Range | Performance |
|---|---|
| Up to 870°C | Excellent |
| 870–1090°C | Excellent |
| Above 1090°C | Very Good |
The chromium content forms a stable oxide layer that protects the alloy at elevated temperatures.
Weldability
| Welding Process | Rating |
|---|---|
| TIG Welding | Excellent |
| MIG Welding | Excellent |
| Resistance Welding | Excellent |
| Laser Welding | Excellent |
Inconel 600 exhibits excellent weldability without post-weld heat treatment in many applications.
Machinability
| Process | Rating |
|---|---|
| CNC Turning | Moderate |
| CNC Milling | Moderate |
| Drilling | Moderate |
| Grinding | Good |
| EDM Machining | Excellent |
Machinability Comparison
| Material | Machinability |
|---|---|
| Aluminum 6061 | Excellent |
| 316 Stainless Steel | Good |
| Inconel 600 | Moderate |
| Inconel 718 | Difficult |
Work hardening requires sharp tooling and optimized cutting parameters.
Heat Treatment
Annealing
| Parameter | Value |
|---|---|
| Temperature | 980–1038°C |
| Cooling Method | Rapid Air Cool |
Stress Relief
| Parameter | Value |
|---|---|
| Temperature | 540–760°C |
| Cooling Method | Air Cool |
Heat Treatability
| Property | Performance |
|---|---|
| Solution Annealing | Excellent |
| Precipitation Hardening | No |
| Structural Stability | Excellent |
Inconel 600 is not precipitation hardenable.
International Equivalent Grades
| Standard | Equivalent Grade |
|---|---|
| UNS | N06600 |
| ASTM | Inconel 600 |
| DIN | 2.4816 |
| EN | NiCr15Fe |
| ISO | NiCr15Fe |
| JIS | NCF600 |
| GB/T (China) | NS312 |
Available Forms
| Product Type | Availability |
|---|---|
| Plate | Yes |
| Sheet | Yes |
| Round Bar | Yes |
| Pipe | Yes |
| Tube | Yes |
| Wire | Yes |
| Forgings | Yes |
Typical Applications
Aerospace Industry
- Jet Engine Components
- Exhaust Systems
- Turbine Hardware
- Combustion Chambers
Heat Treatment Industry
- Furnace Retorts
- Heat Treatment Baskets
- Radiant Tubes
- Muffles
Chemical Processing Industry
- Reactors
- Heat Exchangers
- Process Piping
- Chemical Tanks
Nuclear Industry
- Reactor Components
- Steam Generator Tubes
- Nuclear Equipment
Power Generation
- Boiler Components
- Turbine Systems
- High-Temperature Equipment
Marine Industry
- Offshore Equipment
- Corrosion-Resistant Components
- Seawater Systems
Manufacturing Characteristics
| Manufacturing Process | Rating |
|---|---|
| CNC Machining | Good |
| Welding | Excellent |
| Forming | Excellent |
| Deep Drawing | Good |
| Forging | Excellent |
Advantages
Outstanding High-Temperature Resistance
Maintains mechanical integrity up to approximately 1175°C.
Excellent Corrosion Resistance
Performs exceptionally well in chloride and alkaline environments.
Superior Oxidation Resistance
Resists scaling and degradation at elevated temperatures.
Excellent Weldability
Suitable for complex welded assemblies.
Good Mechanical Properties
Maintains strength and toughness over a broad temperature range.
Long Service Life
Ideal for demanding industrial environments.
Limitations
Higher Cost Than Stainless Steel
Nickel content significantly increases material cost.
Difficult Machining
Work hardening increases machining complexity.
Lower Strength Than Inconel 718
Not intended for the highest-strength aerospace applications.
Heavy Material
Higher density than titanium and aluminum alloys.
Comparison with Other Nickel Alloys
| Property | Inconel 600 | Inconel 625 | Inconel 718 |
|---|---|---|---|
| Corrosion Resistance | Excellent | Outstanding | Excellent |
| High-Temperature Strength | Good | Excellent | Outstanding |
| Weldability | Excellent | Excellent | Good |
| Cost | Moderate | Higher | Higher |
Comparison with Common Engineering Materials
| Material | Density | Tensile Strength | Max Service Temperature |
|---|---|---|---|
| Inconel 600 | 8.47 g/cm³ | 550 MPa | 1175°C |
| 316L Stainless Steel | 8.00 g/cm³ | 485 MPa | 870°C |
| Titanium Grade 5 | 4.43 g/cm³ | 895 MPa | 400°C |
| Inconel 718 | 8.19 g/cm³ | 1240 MPa | 700°C |
Available Surface Finishes
Raw Finishes
- Mill Finish
- Annealed Finish
- Pickled Finish
Functional Finishes
- Precision Machined Finish
- Brushed Finish
- Polished Finish
Specialty Finishes
- Electropolished Finish
- Passivated Finish
- High-Purity Industrial Finish
Frequently Asked Questions (FAQ)
What is Inconel 600?
Inconel 600 is a nickel-chromium alloy designed for excellent corrosion resistance and high-temperature performance.
What is Inconel 600 used for?
Typical applications include:
- Aerospace Components
- Furnace Equipment
- Chemical Processing Systems
- Nuclear Equipment
- Heat Exchangers
What is the equivalent material to Inconel 600?
Common equivalents include:
- UNS N06600
- DIN 2.4816
- NiCr15Fe
- NS312
What is the difference between Inconel 600 and Inconel 625?
| Property | Inconel 600 | Inconel 625 |
|---|---|---|
| Strength | Lower | Higher |
| Corrosion Resistance | Excellent | Outstanding |
| Cost | Lower | Higher |
| Molybdenum Content | None | Present |
Is Inconel 600 corrosion resistant?
Yes. It provides excellent resistance to chloride stress corrosion cracking, oxidation, and many chemical environments.
Can Inconel 600 be welded?
Yes. Inconel 600 offers excellent weldability using conventional welding methods.
Why choose Inconel 600?
Because it combines:
- Excellent Corrosion Resistance
- High-Temperature Stability
- Outstanding Oxidation Resistance
- Excellent Weldability
- Long Service Life
Is Inconel 600 suitable for furnace applications?
Yes. It is one of the most commonly used nickel alloys for furnace and heat treatment equipment.
Does GCNOV provide custom manufacturing services for Inconel 600?
Yes. GCNOV provides:
- CNC Machining
- Precision Turning and Milling
- Nickel Alloy Fabrication
- Welding Services
- Surface Finishing
- Prototype Development
- Low-Volume Production
- Mass Production