Inconel 690 Tube

Inconel 690 is equivalent to N06690, 2.4642 and NiCr29Fe. As a leading nickel alloy supplier in China, Ronsco is enowned for our exceptional production standards, strict quality control, extensive inventory, and unwavering commitment to excellence. We specialize in supplying inconel 690 tube & pipe in various OD, ID, wall thickness and length, to meet customers' needs for different projects.

In addition to on-demand production, we also offer an large inventory, regularly stock a variety of materials and specifications. Regardless of project size, we can all meet deadlines and deliver final products that meet or exceed industry standards.

Alloy 690 tube is a high-chromium nickel alloy. The substantial chromium content gives the alloy outstanding resistance to oxidizing chemicals and to high-temperature oxidizing gases. The high level of nickel imparts resistance to stress corrosion cracking in chloride-containing environments as well as to sodium hydroxide solutions. In addition to its corrosion resistance, alloy 690 has high strength, good metallurgical stability, and favorable fabrication characteristics.

Mechanical properties of the alloy vary with product form and temper. Inconel alloy 690 tube is normally used in the annealed temper. Solution annealing should be carried out at temperatures between 1,020 and 1,070 °C (1,870 to 1,960 °F). If use in a high-temperature range with increased creep resistance is intended, the solution annealing temperature should be raised to between 1,080 and 1,150 °C (1,980 to 2,100 °F). Water quenching should be carried out on workpiece thicknesses over 1.5 mm so that the optimum corrosion resistance of the material can be reached. Workpieces of less than 1.5 mm thickness can be cooled using air nozzles.

• Excellent Corrosion Resistance: Inconel 690, also known as n06690 nickel alloy, offers exceptional corrosion resistance derived from its high-chromium composition, making it particularly effective in challenging oxidizing environments. It provides outstanding protection against strong oxidizing acids, including nitric acid and aggressive mixtures such as nitric/hydrofluoric blends used in pickling and nuclear fuel reprocessing. The alloy also performs well in phosphoric acid across various concentrations and resists sulfur attack at high temperatures.

• High-temperature Performance: Inconel 690 tubing delivers exceptional high-temperature performance through a balance of surface protection and microstructural stability. Its high chromium content forms a durable, self-healing oxide layer that resists oxidation and sulfidation. The nickel-rich matrix ensures long-term metallurgical integrity, preventing embrittlement and maintaining strength under thermal stress.

• Good Weldability: Alloy 690, also known as inconel 2.4642 exhibits excellent weldability. Alloy 690 components are joined to other alloy 690 components using INCONEL Filler Metal 52 and INCONEL Welding Electrode 152. The compositions of the deposits of these welding products are near-matching to that of the alloy 690 base metal. INCONEL Filler Metal 82, INCONEL Welding Electrode 182, and INCO-WELD A Welding Electrode may be used to join alloy 690 to carbon steel, stainless steel, and most dissimilar nickel- chromium and iron-nickel chromium alloys. For welding alloy 690 components for service in highly corrosive aqueous environments, particularly mixtures of nitric and hydrofluoric acids as are commonly used in alloy pickling operations, INCONEL Filler Metal 625 and INCONEL Welding Electrode 112 should be considered.

As a leading inconel 690 tube suppliers in China, Ronsco is re committed to meeting the diverse needs of our customers, including surface treatments such as Acid Pickling (AP), Mechanical Polishing (MP), Bright Annealed (BA), and Electropolished (EP). These treatments enhance the surface quality and performance of the tubes, making them suitable for various demanding applications.