Grade AISI 201 and AISI 202
This steel is a relatively inexpensive replacement for chromium-nickel austenitic steels 321 (08X18H10T), 304 (08H18N10) and others. Optimally alloyed with chromium, nickel, manganese, copper and nitrogen. Chemical composition provides an austenitic structure, high strength, excellent ability to deform. With the latest manufacturing techniques and a balanced chemical composition, austenitic steel grade 12H15G9ND has high corrosion resistance and does not concede on this indicator such popular brands like 08X18H10T, 08H18N10 et al. When used in the organic acid and other moderately corrosive environments. The steel is not suitable for the manufacture of containers and vessels for storage and transportation of acids and other highly aggressive chemical products. For a variety of mechanical properties of these steels are superior to steel grades 08X18H10T, 08H18N10 and others. Steel is easily plastically deformed, amenable to deep drawing and welding, using the same equipment as the standard chromium-nickel austenitic grades. On stamp are sanitary-epidemiological conclusions on the possibility of applications in the food industry. Technological properties: • Hot working: easily forged (at T ≥1260 ° C) and landing. Forgings may be cooled in air. • Cold working: easily handled in a cold state. Extremely durable plastic and with deep drawing, bending, punching and landing. Deformation hardening cold work steels like type 08X18H10T. • Machining: machining is performed under conditions that are similar to those for 08X18H10T type steels. It takes a few large processing force (e.g., cutting) steel as 201 and 202 have a higher strength. • Weldability: Easily welded using arc welding with protective atmosphere. It is possible to use nickel-chromium austenitic filler materials based on steel type 308 and others. High-temperature oxidation: The temperature of the beginning of intensive scaling is 760 ° C in continuous operation. Discoloration on the surface were observed in the temperature range 500-760 ° C by direct heating. In the case where the inside of the test vessel containing water, the surface is no change was observed during six hours of heating to reflux. Some applications: Food and household kitchen accessories: As a relatively inexpensive substitutes for stainless steel sheet 304 (08H18N10), these have become well established themselves abroad as a material for the manufacture of metal utensils, household kitchen utensils (dishes shallow, medium and deep-draw ratio; kitchen and cutting tables, water tanks, knives for cutting the products, etc .; and thermos flasks, water storage tanks, etc.), as well as for the manufacture of structural elements and apparatus for the food industry. Corrosion resistance of some "food" environments: Corrosion when fully immersed in a 3% NaCl solution Tests at room temperature for 720 hours in a boiling solution for 100 hours showed no visible signs of corrosion. The corrosion rate was very low, regardless of the test temperature, and was about 0.01 mm / year. Corrosion when fully immersed in different mixtures of organic acids (0.5% + 0.5% acetic breast); (0.5% + 0.5% citric wine). Tests at room temperature for 720 hours in boiling solutions for 100 hours showed no visible signs of corrosion. The corrosion rate was very low, regardless of the test temperature, and was about 0.01 mm / year. Addition to a mixture of 3% NaCI solution did not increase the corrosion rate. Crack under load: Test for 30 days at room temperature and for 100 hours in boiling above showed no cracking environments with increasing 500X. . Durables (including home use): Gas and other plates; drum washing machines, steel furniture (handles, locks, hinges for hinged doors, etc.), vases for flowers and fruit; trays etc. Architectural and engineering structures: window and door frames, railings and handrails; decorative designs and pipes; bins, trash cans and containers for waste, etc. Transport: caps on the wheels; Car decoration elements; Brush holders for cleaning glasses; rims and bumpers; Auto accessories etc.