Inconel 693 Seamless Pipes ASTM B167 Alloy 693 Seamless Tube UNS N06693

A nickel-chromium alloy with addition of aluminium to offer optimum resistance to metal dusting attack of any available conventional nickel-based alloy. The high chromium content gives excellent resistance to oxidation and sulphidation. The addition of aluminium improves resistance to other high temperature corrosion mechanisms. Alloy 693 exhibits excellent resistance to oxidation and carburisation at temperatures up to 1150°C (2100°F). The alloy’s resistance to metal dusting attack makes it especially suitable for systems used to generate synthesis gas and in hydrogen reformers.

Standard Product Forms:

Plate, sheet, strip, bar, seamless tubes and pipes

Major Specification:

UNS N06693 ASTM B 166, B 167, B 168 ASME SB 166, SB 167, SB 168

Chemical Composition:

Inconel 693 is a nickel-based superalloy with the following key alloying elements:

Nickel (Ni): ~58-63% (provides excellent corrosion resistance and high-temperature strength)

Chromium (Cr): ~27-31% (enhances oxidation and corrosion resistance)

Aluminum (Al): ~2.5-4% (improves oxidation resistance and forms a protective oxide layer)

Iron (Fe): ~2.5-6% (minor component for structural stability)

Niobium (Nb): ~0.5-2.5% (enhances strength and creep resistance)

Titanium (Ti): ~0.5% (improves mechanical properties)

Carbon (C): ~0.15% (strengthens the alloy)

Manganese (Mn): ~1% (improves hot workability)

Silicon (Si): ~1% (enhances oxidation resistance)

Applications:

Inconel 693 seamless pipes are used in industries and applications where high-temperature performance and corrosion resistance are critical. Common applications include:

Chemical Processing: High-temperature reactors, furnace components, and piping systems.

Petrochemical: Equipment exposed to sulfidation and carburization environments.

Heat Treatment: Furnace fixtures, radiant tubes, and heat exchangers.

Power Generation: Gas turbine components, combustors, and exhaust systems.

Waste Incineration: Components exposed to high temperatures and corrosive gases.

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More Grades for your Choice:

Hunan Dinghan New Material Technology Co.,Ltd. (DINGSCO) specialized in Nickel Based Corrosion Resistant and High Temperature alloys products which used in the world’s most technically demanding industries and applications.

We have complete advanced technology facilities to produce best quality alloys to meet exacting your specifications such as VIM (Vacuum lnduction Melting) furnace to provide high purity Alloys,ESR (Electro Slag Re-melting) furnace to enhances the structure and purity of the Alloys, and CNC machining equipments (Lathe, Wire cutting, Drilling,Milling) to provide high precision finished products.

We are dedicated to providing our customers with best quality products,fastest possible deliveries, most competitive prices of Nickel Based Corrosion Resistant and High Temperature alloys in bars,rods,forged flanges, valve parts, forged shapes (shafts, discs, blocks, hubs,rings, cylinders and tailor shapes) according to ASTM,ASME,API,AMS, NACE and other industry standards.

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