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Stainless steel is an alloy of Iron with a minimum of 10.5% Chromium. Chromium produces a thin layer of oxide on the surface of the steel known as the ‘passive layer’. This prevents any further corrosion of the surface. Increasing the amount of Chromium gives an increased resistance to corrosion.Stainless steel also contains varying amounts of Carbon, Silicon and Manganese. Other elements such as Nickel and Molybdenum may be added to impart other useful properties such as enhanced formability and increased corrosion resistance.<\/p>\r\n
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composition of steel. In stainless steel. Austenitic steels, which contain 16 to 26 percent chromium and up to 35 percent nickel, usually have the highest corrosion resistance. They are not hardenable by heat treatment and are nonmagnetic. The most common type is the 18\/8, or 304, grade, which contains 18 percent\u2026<\/p>\r\n
[\/vc_column_text][\/vc_column][\/vc_row][vc_row][vc_column width=”1\/5″][\/vc_column][vc_column width=”1\/5″][\/vc_column][vc_column width=”1\/5″][vc_single_image image=”2211″ img_size=”medium” alignment=”center” style=”zoooom” css_animation=”slideInDown”][\/vc_column][vc_column width=”1\/5″][\/vc_column][vc_column width=”1\/5″][\/vc_column][\/vc_row][vc_row][vc_column css_animation=”slideInDown”][vc_column_text]<\/p>\r\n
[\/vc_column_text][\/vc_column][\/vc_row][vc_row][vc_column][vc_tta_tabs style=”modern” shape=”round” color=”mulled-wine” active_section=”1″ css_animation=”slideInDown”][vc_tta_section title=”Austenitic” tab_id=”1537860870319-3364ddbb-4fee”][vc_column_text]<\/p>\r\n
Austenitic\u00a0<\/strong><\/span><\/p>\r\n These steels are the most common. Their microstructure is derived from the addition of Nickel, Manganese and Nitrogen. It is the same structure as occurs in ordinary steels at much higher temperatures. This structure gives these steels their characteristic combination of weldability and formability. Corrosion resistance can be enhanced by adding Chromium, Molybdenum and Nitrogen. They cannot be hardened by heat treatment but have the useful property of being able to be work hardened to high strength levels whilst retaining a useful level of ductility and toughness. Standard austenitic steels are vulnerable to stress corrosion cracking. Higher nickel austenitic steels have increased resistance to stress corrosion cracking. They are nominally non-magnetic but usually exhibit some magnetic response depending on the composition and the work hardening of the steel.<\/p>\r\n [\/vc_column_text][\/vc_tta_section][vc_tta_section title=”Ferritic” tab_id=”1537860870382-8447df2b-2038″][vc_column_text]<\/p>\r\n Ferritic<\/strong><\/span><\/p>\r\n These steels are based on Chromium with small amounts of Carbon usually less than 0.10%. These steels have a similar microstructure to carbon and low alloy steels. They are usually limited in use to relatively thin sections due to lack of toughness in welds. However, where welding is not required they offer a wide range of applications. They cannot be hardened by heat treatment. High Chromium steels with additions of Molybdenum can be used in quite aggressive conditions such as sea water. Ferritic steels are also chosen for their resistance to stress corrosion cracking. They are not as formable as austenitic stainless steels. They are magnetic.<\/p>\r\n [\/vc_column_text][\/vc_tta_section][vc_tta_section title=”Martensitic” tab_id=”1537861113948-0ddcae9f-4dca”][vc_column_text]<\/p>\r\n Martensitic<\/strong><\/span><\/p>\r\n These steels are similar to ferritic steels in being based on Chromium but have higher Carbon levels up as high as 1%. This allows them to be hardened and tempered much like carbon and low-alloy steels. They are used where high strength and moderate corrosion resistance is required. They are more common in long products than in sheet and plate form. They have generally low weldability and formability. They are magnetic.<\/p>\r\n [\/vc_column_text][\/vc_tta_section][vc_tta_section title=”Duplex” tab_id=”1537861169428-60e9447f-e099″][vc_column_text]<\/p>\r\n Duplex<\/strong><\/span><\/p>\r\n These steels have a microstructure which is approximately 50% ferritic and 50% austenitic. This gives them a higher strength than either ferritic or austenitic steels. They are resistant to stress corrosion cracking. So called \u201clean duplex\u201d steels are formulated to have comparable corrosion resistance to standard austenitic steels but with enhanced strength and resistance to stress corrosion cracking. \u201cSuperduplex\u201d steels have enhanced strength and resistance to all forms of corrosion compared to standard austenitic steels. They are weldable but need care in selection of welding consumables and heat input. They have moderate formability. They are magnetic but not so much as the ferritic, martensitic and PH grades due to the 50% austenitic phase.<\/p>\r\n [\/vc_column_text][\/vc_tta_section][vc_tta_section title=”Precipitation hardening” tab_id=”1537861220716-83b4d4d6-c5c7″][vc_column_text]<\/p>\r\n Precipitation hardening (PH)<\/strong><\/span><\/p>\r\n These steels can develop very high strength by adding elements such as Copper, Niobium and Aluminium to the steel. With a suitable \u201caging\u201d heat treatment, very fine particles form in the matrix of the steel which imparts strength. These steels can be machined to quite intricate shapes requiring good tolerances before the final aging treatment as there is minimal distortion from the final treatment. This is in contrast to conventional hardening and tempering in martensitic steels where distortion is more of a problem. Corrosion resistance is comparable to standard austenitic steels like 1.4301 (304).<\/p>\r\n [\/vc_column_text][\/vc_tta_section][\/vc_tta_tabs][\/vc_column][\/vc_row][vc_row][vc_column][vc_tta_tabs style=”modern” shape=”round” color=”mulled-wine” active_section=”1″ css_animation=”slideInDown”][vc_tta_section title=”Typical Austenitic” tab_id=”1537872549312-c3abba6e-c223″][vc_column_text]<\/p>\r\n Typical Austenitic<\/strong><\/p>\r\n Steel\u00a0<\/strong>305<\/span><\/p>\r\n Steel 301<\/span><\/p>\r\n Steel\u00a0310<\/span><\/p>\r\n Steel\u00a0308<\/span><\/p>\r\n Steel 317<\/span><\/p>\r\n Steel 316<\/span><\/p>\r\n [\/vc_column_text][\/vc_tta_section][vc_tta_section title=”Low carbon steel” tab_id=”1537872549376-3ac18553-5ad6″][vc_column_text]<\/p>\r\n Low carbon steel<\/strong><\/p>\r\n steel\u00a0304L<\/span><\/p>\r\n steel 310L<\/span><\/p>\r\n \u00a0steel\u00a0317L<\/span><\/p>\r\n [\/vc_column_text][\/vc_tta_section][vc_tta_section title=”Nitrogenous steel” tab_id=”1537872934672-f3f0f12a-d761″][vc_column_text]<\/p>\r\n Nitrogenous steel<\/strong><\/p>\r\n steel\u00a0316N<\/span><\/p>\r\n steel\u00a0304N<\/span><\/p>\r\n steel\u00a0202<\/span><\/p>\r\n steel\u00a0201<\/span><\/p>\r\n [\/vc_column_text][\/vc_tta_section][vc_tta_section title=”Alloy Austenitic” tab_id=”1537872935186-1499f524-5b8d”][vc_column_text]<\/p>\r\n Alloy Austenitic<\/strong><\/p>\r\n steel 317LX<\/span><\/p>\r\n steel 317LM<\/span><\/p>\r\n [\/vc_column_text][\/vc_tta_section][\/vc_tta_tabs][\/vc_column][\/vc_row]<\/p>\r\n","protected":false},"excerpt":{"rendered":" [vc_row][vc_column][vc_empty_space][\/vc_column][\/vc_row][vc_row][vc_column css_animation=”top-to-bottom”][vc_column_text] Stainless\u00a0steel Stainless steel is an alloy of Iron with a minimum of 10.5% Chromium. Chromium produces a thin layer of oxide on the surface of the steel known as the ‘passive layer’. This prevents any further corrosion of the surface. Increasing the amount of Chromium gives an increased resistance to corrosion.Stainless steel also […]<\/p>\n","protected":false},"author":1,"featured_media":0,"parent":1170,"menu_order":0,"comment_status":"closed","ping_status":"closed","template":"","meta":[],"translation":{"provider":"WPGlobus","version":"2.8.11","language":"en","enabled_languages":["fa","en"],"languages":{"fa":{"title":true,"content":true,"excerpt":false},"en":{"title":false,"content":true,"excerpt":false}}},"_links":{"self":[{"href":"https:\/\/setco-company.com\/en\/wp-json\/wp\/v2\/pages\/1173"}],"collection":[{"href":"https:\/\/setco-company.com\/en\/wp-json\/wp\/v2\/pages"}],"about":[{"href":"https:\/\/setco-company.com\/en\/wp-json\/wp\/v2\/types\/page"}],"author":[{"embeddable":true,"href":"https:\/\/setco-company.com\/en\/wp-json\/wp\/v2\/users\/1"}],"replies":[{"embeddable":true,"href":"https:\/\/setco-company.com\/en\/wp-json\/wp\/v2\/comments?post=1173"}],"version-history":[{"count":57,"href":"https:\/\/setco-company.com\/en\/wp-json\/wp\/v2\/pages\/1173\/revisions"}],"predecessor-version":[{"id":2660,"href":"https:\/\/setco-company.com\/en\/wp-json\/wp\/v2\/pages\/1173\/revisions\/2660"}],"up":[{"embeddable":true,"href":"https:\/\/setco-company.com\/en\/wp-json\/wp\/v2\/pages\/1170"}],"wp:attachment":[{"href":"https:\/\/setco-company.com\/en\/wp-json\/wp\/v2\/media?parent=1173"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}