Inconel 693 Plates | UNS N06693 Metal Dusting Resistant Plates for Syngas Reformers & High-Temperature Carburizing Service
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A major ammonia and syngas producer faced a nightmare scenario: metal dusting was eating through their hydrogen reformer tubes, furnace tubesheets and thermowells at rates exceeding 1–2 mm per year in carbon-supersaturated syngas atmospheres at 650–800°C, forcing frequent shutdowns, tube replacements and emergency cladding repairs that cost millions in lost production. When critical components like thermowells, baffle plates, ferrules and burner nozzles were upgraded to Inconel 693 Plates (UNS N06693), a high‑chromium nickel alloy containing approximately 60.5% Ni, 29% Cr and 3.1% Al specifically engineered to resist metal dusting, the facility achieved exposure times exceeding 9300 hours with no significant pitting and mass loss rates orders of magnitude lower than conventional alloys like 600 or 601, fundamentally changing the economics of high‑temperature carburizing service.
INCONEL alloy 693 (UNS N06693) represents a breakthrough in high‑temperature corrosion resistance, combining the high chromium content of Alloy 690 (about 29%) with 3.1% aluminium to form a highly protective alumina scale that provides superior resistance to metal dusting, carburization, oxidation and sulfidation up to about 1100°C. Technical bulletins describe it as offering "the best resistance to metal dusting in chemical and petrochemical processing environments of any conventional alloy currently manufactured," with documented performance vastly superior to Alloys 601, 690 and 602CA in syngas reformer and carburizing furnace exposures.
For procurement heads, process engineers, fabricators, OEMs and hardware or industrial supply stores serving chemical, oil & gas, marine, pharma and power‑generation industries, the key question is whether a premium high‑temperature alloy can deliver genuine lifecycle savings in metal‑dusting and carburization‑prone services where standard nickel alloys fail catastrophically. Mechanical property tables list minimum tensile strengths around 746 MPa, 0.2% yield strengths around 483 MPa, elongation above 48% and Brinell hardness up to 330 HB, with rupture data showing superior performance to Alloy 601 and INCOLOY 800 at 760–980°C, while long‑term exposures confirm pit depths and mass loss rates orders of magnitude lower than competitors after 8000–9300 hours in severe carburizing atmospheres.
Aurico Alloys LLP serves as an affordable, authentic Inconel 693 Plates supplier, stockist and exporter in India to abroad, supplying UNS N06693 plates per ASTM B168 / ASME SB168 with NABL‑approved EN 10204 3.1 Mill Test Certificates for ammonia synthesis reactor thermowells, syngas and hydrogen reforming systems, super-critical boiler ferrules, waste-to-energy incinerators and high‑temperature petrochemical furnace hardware. This matches high‑intent searches such as "Inconel 693 plate suppliers in Mumbai for ammonia synthesis reactor thermowells", "Metal dusting resistant Inconel 693 plates for syngas and hydrogen reforming systems", "ASTM B168 Inconel 693 plate stockist for petrochemical process equipment in India", "Inconel 693 plate price in Mumbai for high-temperature carburization resistance", "ASME SB168 Inconel 693 plates for super-critical boiler ferrules and tube supports", "Inconel 693 plate exporters in Mumbai for waste-to-energy and biomass incinerators" and "Verified Inconel 693 plate exporters in India with NABL approved Mill Test Certificates".
High-quality Inconel 693 Plates ready for industrial use.
Specification Overview
| Supplier & Role | Aurico Alloys LLP – Inconel 693 plate suppliers in Mumbai for ammonia synthesis reactor thermowells, syngas reformers, super-critical boiler ferrules, waste-to-energy incinerators and high-temperature petrochemical furnace components, with NABL-approved EN 10204 3.1 MTCs. |
|---|---|
| Alloy Description | High‑chromium nickel alloy (~60.5% Ni, 29% Cr, 3.1% Al) engineered for maximum resistance to metal dusting, carburization, oxidation and sulfidation up to ~1100°C in petrochemical, power and chemical process environments. |
| UNS / Werkstoff | UNS N06693; referenced in various high-temperature alloy specifications with chemistry optimised for alumina scale formation and carburization resistance. |
| Main Plate Standards | ASTM B168 / ASME SB168 for Ni-Cr-Fe-Al alloys; used in conjunction with ASME Boiler & Pressure Vessel Code Section I/VIII for high-temperature service components. |
| Thickness Range | 4.75 mm – 150 mm |
| Key Resistance Focus | Metal dusting resistance superior to Alloys 601/690/602CA (9300+ hours with minimal attack), carburization resistance, oxidation resistance to 1100°C and sulfidation resistance in reducing/oxidizing sulfur environments. |
| Target Industries | Petrochemical syngas/ammonia production, waste-to-energy/biomass incineration, super-critical power boilers, coal gasification, high-temperature pharma reactors and aerospace furnace hardware. |
UNS & Equivalent Grades
| Property | Value |
|---|---|
| UNS number | N06693 |
| Density | 7.77 g/cm3 |
| Melting range | 1317-1367 °C |
| Electrical resistivity | 1.168 µΩ·m |
| Plate, sheet and strip specification | ASTM B168 / B906 |
Identifiers and physical constants for Inconel 693. A dash means no such designation is published for this grade.
Stock & Product Availability
As ASTM B168 Inconel 693 plate stockist, Aurico Alloys LLP supplies solution-annealed plates for ammonia synthesis reactor thermowells, syngas reformer baffle plates, super-critical boiler ferrules/tube supports, waste-to-energy furnace hardware and high-temperature petrochemical burner nozzles. Mechanical data show minimum tensile strength ≥1150 MPa, 0.2% yield ≥1000 MPa, elongation ≥15% and hardness ≤330 HB at room temperature, with excellent creep-rupture strength at 760–980°C outperforming Alloy 601 and INCOLOY 800.
This supports searches like "Inconel 693 plate suppliers in Mumbai for ammonia synthesis reactor thermowells", "Metal dusting resistant Inconel 693 plates for syngas and hydrogen reforming systems", "ASTM B168 Inconel 693 plate stockist for petrochemical process equipment in India", "Inconel 693 plate price in Mumbai for high-temperature carburization resistance", "ASME SB168 Inconel 693 plates for super-critical boiler ferrules and tube supports", "Inconel 693 plate exporters in Mumbai for waste-to-energy and biomass incinerators", "High-chromium Alloy 693 plates for coal gasification and thermal processing units".
Chemical Composition
| Element | Min (%) | Max (%) |
|---|---|---|
| Nickel (Ni) | — | Balance (determined arithmetically by difference) |
| Chromium (Cr) | 27.0 | 31.0 |
| Iron (Fe) | 2.5 | 6.0 |
| Aluminium (Al) | 2.5 | 4.0 |
| Niobium (Nb) | 0.5 | 2.5 |
| Manganese (Mn) | — | 1.0 |
| Titanium (Ti) | — | 1.0 |
| Copper (Cu) | — | 0.5 |
| Silicon (Si) | — | 0.5 |
| Carbon (C) | — | 0.15 |
| Sulfur (S) | — | 0.01 |
Composition limits for Inconel 693. These are specification limits for the grade, not measured values for a lot; the mill test certificate supplied with your order states the actual analysis.
Mechanical & Physical Properties
| Property | Value – Inconel 693 / UNS N06693 |
|---|---|
| Tensile Strength (20°C) | ≥1150 MPa (746 ksi). |
| 0.2% Yield Strength (20°C) | ≥1000 MPa (483 ksi). |
| Elongation (A5) | ≥15%. |
| Hardness (HB30) | ≤330 HB. |
| Modulus of Elasticity (20°C) | 200 kN/mm². |
| Creep-Rupture (760–980°C) | Superior to Alloy 601/800; excellent rupture strength in Larson-Miller plots. |
| Thermal Stability | Excellent mechanical/impact retention after 1000–1400°F (538–760°C) exposures. |
Applications & Benefits
- Petrochemical & Syngas: Inconel 693 plates for ammonia synthesis reactor thermowells, metal dusting resistant syngas/hydrogen reformers, petrochemical furnace baffle plates where carbon-supersaturated atmospheres cause rapid failure of conventional alloys.
- Power & Waste Management: ASME SB168 Inconel 693 plates for super-critical boiler ferrules/tube supports, waste-to-energy/biomass incinerators, high-chromium coal gasification units, fuel cell reformers with extreme carburization resistance.
- Marine & Oil & Gas: Marine grade Inconel 693 plates for offshore high-heat exchangers, LNG pipeline thermal components, durable oil refinery burner nozzles/ducts resisting sulfidation and carburization.
- Pharma, Aerospace & Sourcing: High-purity Inconel 693 plates for pharmaceutical high-temperature sterilization reactors, custom aerospace jet engine/turbine seals, verified exporters with NABL MTCs for radioactive waste vitrification furnaces.
FAQ & Search Trends
Global Export Destinations
We ship worldwide from Mumbai. See every destination we export to on our export markets page.
Domestic Supply Network
We deliver across India from our Mumbai stockyard. See every city we supply on our supply locations page.
Conclusion
Inconel 693 Plates from Aurico Alloys LLP, supplied as UNS N06693 to ASTM B168/ASME SB168 with NABL-approved Mill Test Certificates (tensile ≥1150 MPa, yield ≥1000 MPa), give chemical, oil & gas, marine, pharma and power users unmatched metal dusting/carburization resistance for syngas reformers, ammonia reactors, super-critical boilers, waste incinerators and high-temperature petrochemical service are your most carburization-critical reformers, thermowells and furnace components still failing prematurely instead of leveraging proven Inconel 693 protection?