Special types or stainless steel and steel
In addition to classic materials, you can also contact us for special materials. Special materials require specific knowledge and processing techniques, which we possess. Processing (laser cutting, bending, rolling, ...) of very thin materials (0.2 to 0.5 mm) is also possible. Special alloys include materials such as Inconel, Hastelloy, duplex types, heat-resistant materials, etc. In addition to these special alloys, Alinco maintains a large stock of basic materials, including AISI 304, 316, 316ti, AlMg3, and various steel types.
Knowledge and experience with these products are important for processing. Basic materials are often harder or more difficult to process, and the correct welding processes must be followed using the right filler materials, ...
With this accumulated knowledge, we are very creative. The photo attached shows, for example, a series of pipe sections in Hastelloy C22, where the internal Ra value was very strict, and we even machined our own weld ferrules.
Inconel Alloy 600
Inconel Alloy 600 has good resistance to reduction and oxidation. This material also has excellent corrosion resistance at room temperature and higher temperatures. Not only are these temperatures no problem for this material, but chlorine and hydrogen chloride gas also have no chance with this material.
Hastelloy Alloy C-22
Hastelloy C-22 alloy is a very versatile Ni-Cr-Mo-W alloy with corrosion resistance better than other Ni-Cr-Mo alloys including Hastelloy C-276 alloy, Hastelloy C-4 alloy, and Alloy 625. Alloy C-22 offers exceptionally high resistance to pitting, crevice, and stress corrosion at both low and high temperatures. Additionally, Alloy C-22 is highly resistant to oxidizing aqueous solutions including wet chlorine and to solutions with nitric acid or oxidizing resistance. Due to this versatility, Alloy C-22 is the choice for systems with extremely varying aggressiveness. Hastelloy C-22 alloy is used in flue gas desulfurization installations, for example, for the lining of flue gas ducts. In environmental technology, Alloy C-22 is used in agitators, heat exchangers, compressors, and spray system linings. In the treatment of gases from the incineration of chemical, hospital, and household waste, Alloy C-22 is used in valves, fans, agitators, etc. In the pharmaceutical industry, Alloy C-22 is used in 'multi-purpose' pressure filters-dryers, reactors, and centrifuges, thereby minimizing product contamination. In general, Alloy C-22 performs better than Alloy C-276 in virtually all the above-mentioned applications where mainly oxidizing acidic halide environments are encountered. Alloy C-22 is both cold and hot deformable. The deformation temperature during hot forming is between 950 and 1230°C. Standard deformation techniques can be applied. Due to the thermal stability of Alloy C-22, no heat treatment is necessary after welding.
Alloy 400
Alloy 400 is a Ni-Cu alloy that combines reasonable strength and ductility with good weldability and high corrosion resistance over a wide temperature range. Alloy 400 is particularly suitable for use in brackish and seawater environments with high flow rates such as propellers, propeller shafts, pump shafts, pump impellers, and condenser tubes. The corrosion rate in very fast flowing and aerated brackish and seawater is usually not more than 0.03 mm/year. The corrosion resistance of Alloy 400 in chlorinated solvents, de-aerated hydrochloric acid, and hydrofluoric acid, sulfuric acid, and virtually all alkalis is high and generally free of stress corrosion. The expansion coefficient is the same as that of steel, making it suitable for use in constructions subject to temperature changes.
