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Model No: Inconel 693
Inconel Alloy 693 - Lork Group
The core competitive advantage of Inconel Alloy 693 lies in its powerful one-two punch: "high chromium content (for resistance to oxidation and sulfidation) combined with aluminum addition (to combat metal dusting)." Currently, within the specialized niche of high-temperature carbon corrosion resistance, Alloy 693 stands unrivaled.
Delivery :
FOB
minimum order :
100 kilograms
Supply Ability :
5000Tonkilograms / Month
Stock Time :
7-10Day
Country of Origin :
China
Quantity :
Inconel 693 (UNS N06693) is a new-generation nickel-based alloy developed based on Inconel 690. Its high chromium content (27–31%) represents the highest level found among commercially available nickel-chromium alloys, while its aluminum content (2.5–4.0%) serves as Alloy 693's unique advantage.
If you encounter high-temperature, carbon-rich environments—such as those involving syngas, reformer gas, or ethylene cracking gas—ordinary stainless steel or alloys like 600 and 601 may succumb to metal dusting within just one or two years. Alloy 693 was specifically designed to address this very issue; it is currently the most metal-dusting-resistant alloy available on the market—bar none.
Its typical applications include: syngas production equipment (for methanol, ammonia, and hydrogen), ethylene cracking furnace tubes and fittings, waste incinerator superheaters, high-temperature fuel cell components, and heat-treating furnace rollers and radiant tubes. Simply put, for any complex operating environment involving high temperatures (500–1000°C) combined with the presence of carbon and sulfur, Alloy 693 is the preferred choice.
Chemical Composition
| Element | Content (%) |
| Nickel. Ni | 53.34 - 67.5 |
| Chromium, Cr | 27 - 31 |
| Iron, Fe | 2.5 - 6 |
| Aluminum, Al | 2.5-4 |
| Titanium, Ti | ≤ 1 |
| Manganese, Mn | ≤ 1 |
| Niobium, Nb | 0.50 - 2.5 |
| Copper, Cu | ≤ 0.50 |
| Silicon, Si | ≤ 0.50 |
| Carbon, C | ≤ 0.15 |
| Sulfur, S | ≤ 0.010 |
Purity Requirements: Material 693 is sensitive to impurities such as sulfur and phosphorus; therefore, when making a purchase, it is recommended that you request a purity analysis report from the supplier (indicating O and N content ≤ 100 ppm).
Highlights of Physical and High-Temperature Properties
Density: 7.77–7.89 g/cm³
Melting Point Range: 1317–1367°C
Modulus of Elasticity: Approx. 200 GPa
Thermal Conductivity: 11.7–16 W/(m·K) (at 1000°C)
Electrical Resistivity: 1.168 μΩ·m
Oxidation Resistance Limit: 1150°C (continuous service)
Creep Resistance: Under conditions of 980°C and 35 MPa, the creep rupture time can reach 48 hours.
Thermal Stability: In the temperature range of 700–900°C, its creep resistance performance is superior to that of Alloy 601.
Melting Point Range: 1317–1367°C
Modulus of Elasticity: Approx. 200 GPa
Thermal Conductivity: 11.7–16 W/(m·K) (at 1000°C)
Electrical Resistivity: 1.168 μΩ·m
Oxidation Resistance Limit: 1150°C (continuous service)
Creep Resistance: Under conditions of 980°C and 35 MPa, the creep rupture time can reach 48 hours.
Thermal Stability: In the temperature range of 700–900°C, its creep resistance performance is superior to that of Alloy 601.
Based on our past manufacturing experience, we consider the service temperature limit for Inconel 693 alloy to be 1000–1400°F (538–760°C); prolonged exposure within this range will result in the precipitation of secondary phases, thereby reducing ductility.
Mechanical Properties
| Product Form/Condition | Tensile Strength (MPa) | Yield Strength (MPa) | Elongation |
| Hot-Rolled Annealed Sheet | 882.6 | 489.5 | 45% |
| Cold-Drawn Annealed Tube | 937.7 | 530.9 | 42% |
| Bars (Standard Requirements) | ≥1150 | ≥1000 | ≥15% |
| Thick Plate (Solution-Treated) | ≥795 | ≥345 | ≥30% |
Intermediate-Temperature Embrittlement: A Pitfall Often Overlooked
This is a critical point: when Inconel alloy 693 is exposed to temperatures within the 1000–1400°F (538–760°C) range for extended periods, secondary phases will precipitate, resulting in a decline in ductility and impact strength.
If your specific application falls within this temperature range, please take note:"If the equipment operates at these temperatures for prolonged durations, the performance of Alloy 693 will degrade. You must either select an alternative material or perform periodic annealing treatments to redissolve these detrimental phases."
Standards and Grades
When confirming your product form requirements for Inconel alloy 693, we will discuss a key technical point with you: the applicable standards.
| Standard / Grade | Description |
| UNS N06693 | Most Common Unified Numbering System Designation |
| W.Nr. 2.4642 | German Standard Number |
| ASTM B168 | Plate / Sheet / Strip |
| ASTM B166 | Bar |
| ASTM B167/B829 | Tube (Seamless) |
| ASTM B564 | Forgings |
| AMS 5906 | Aerospace Material Specification |
Confirming Product Form and Specifications
Prior to issuing a formal quotation, we will also clarify several specific supply requirements regarding Inconel Alloy 693:
- Form: Plate, Bar, Tube, Forging, or Wire?
- Dimensions: Thickness/Diameter; Width/Length
- Condition: Solution Annealed (Standard Delivery Condition)
- Melting Process: Is the VIM+ESR double-melting process required? (Typically mandated for aerospace and nuclear power applications)
- Operating Conditions and Service Environment: (To confirm material suitability)
Lork Group is an supplier of industrial metals to the global aerospace, oil and gas, power generation, petrochemical, bio-medical, pharmaceutical, and other high tech manufacturing industries. Products of premium metal products including Inconel alloys,Incoloy alloys,Monel alloys,Haynes alloys,Hastelloy alloy,stainless steelandother superalloy. We certify to most ASME, ASTM, AMS, and military specifications as well as most international standards certification.
