The alloy contains at least 10.50% chromium and different amounts of nickel, and is resistant to high temperature and chemical corrosion. These steels, which do not have any magnetic properties but can be shaped by cold working, are not applied by heat treatment due to the small amount of carbon they contain. The most widely used and known grades among stainless steels are also included in this group. The most versatile and most used stainless steel in the world is 304 quality. Its austenitic structure and intermediate annealing requires deep plastering. Due to this situation, it is widely used in products that require deep plastering such as pots with handles, natural gas chimneys and sinks.
304L, which is used for different purposes in transportation, architecture and industrial sectors, is determined as a 304 type with slightly less carbon. The nickel it contains is slightly more than 304. The austenic structure provides excellent toughness and maintains this level of toughness even at chronological temperatures. This product is also partially difficult to process. In addition, 304L product is even more difficult than 304. Among the 303 quality austenics, it appears as the quality with the best processed feature. This product, which has a machinable feature extending up to 78%, is called the automaton of stainless steel. Although the sulfur in it increases its machinability a little more, it reduces its corrosion resistance and makes its shaping weaker.
It is not suitable for steep bends and its toughness is almost the same as 304 according to the sulfur it contains. After 304, the most well-known stainless steel is shown as 316 quality. These products are used for different purposes in a number of different sectors such as transportation, architecture and industrial, and these products do not require annealing after welding in thin sections. The lowest carbon of 316 appears to be 316L.
The main norms called American Norms are; AISI 303 - 304 - 304L - 310 - 310S - 316 - 316L - 316Ti - 321
