{"id":7021,"date":"2026-06-26T12:13:25","date_gmt":"2026-06-26T12:13:25","guid":{"rendered":"https:\/\/www.spreadon.net\/industrial1\/?page_id=7021"},"modified":"2026-06-26T12:13:25","modified_gmt":"2026-06-26T12:13:25","slug":"about-stainless-steels","status":"publish","type":"page","link":"https:\/\/www.spreadon.net\/industrial1\/about-stainless-steels\/","title":{"rendered":"About stainless steels"},"content":{"rendered":"<style>\n.so-detail-wrap{max-width:1180px;margin:0 auto;padding:36px 20px 60px;display:flex;gap:28px;align-items:flex-start;font-family:'Segoe UI',Arial,sans-serif;}\n.so-sidebar{width:240px;flex-shrink:0;}\n.so-sidebar-title{background:#034170;color:#fff;font-size:12px;font-weight:700;letter-spacing:1.5px;text-transform:uppercase;padding:13px 16px;border-left:4px solid #c04023;}\n.so-acc{list-style:none;border:1px solid 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36px;height:36px;box-sizing:border-box;font-size:12px;color:#444;text-decoration:none;border-bottom:1px solid #f5f5f5;transition:background 0.15s,color 0.15s;}\n.so-sub2>li>a:hover{background:#fdf0ed;color:#c04023;}\n.so-sub2>li>a.so-active{background:#fce8e3;color:#c04023;font-weight:700;}\n.so-article{flex:1;min-width:0;}\n.so-article-header{border-bottom:2px solid #c04023;padding-bottom:10px;margin-bottom:20px;}\n.so-article-header h2{font-size:21px;font-weight:700;color:#034170;letter-spacing:0.3px;margin:0;}\n.so-article p{font-size:14px;line-height:1.75;color:#3a3a3a;margin:0 0 14px;}\n.so-article h3{font-size:16px;font-weight:700;color:#034170;border-left:4px solid #c04023;padding-left:10px;margin:28px 0 14px;}\n.so-article h4{font-size:13.5px;font-weight:700;color:#c04023;text-transform:uppercase;letter-spacing:0.5px;margin:18px 0 8px;}\n.so-callout{background:#f7f9fc;border:1px solid #dce3ee;border-left:4px solid #c04023;padding:18px 22px;margin:18px 0 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Categories<\/div>\n<ul class=\"so-acc\" id=\"so-acc-main\">\n<li>\n<div class=\"so-acc-btn\">Pure Titanium &amp; Alloys <span class=\"soarrow\">&#9660;<\/span><\/div>\n<ul class=\"so-sub1\">\n<li><a href=\"\/industrial1\/about-titanium\/\">About Titanium<\/a><\/li>\n<li><a href=\"\/industrial1\/titanium-tube-and-pipe\/\">Titanium Tube and Pipe<\/a><\/li>\n<li><a href=\"\/industrial1\/titanium-strip-sheet-and-plate\/\">Titanium Strip, Sheet &amp; Plate<\/a><\/li>\n<li><a href=\"\/industrial1\/titanium-bar-and-rod\/\">Titanium Bar and Rod<\/a><\/li>\n<li><a href=\"\/industrial1\/titanium-welded-wire-and-wire\/\">Titanium Welded Wire and Wire<\/a><\/li>\n<li><a href=\"\/industrial1\/titanium-foil\/\">Titanium Foil<\/a><\/li>\n<li><a href=\"\/industrial1\/titanium-forging\/\">Titanium Forging<\/a><\/li>\n<li><a href=\"\/industrial1\/titanium-flange\/\">Titanium Flange<\/a><\/li>\n<li><a href=\"\/industrial1\/titanium-pipe-fittings\/\">Titanium Pipe Fittings<\/a><\/li>\n<li><a href=\"\/industrial1\/titanium-casting\/\">Titanium Casting<\/a><\/li>\n<li><a href=\"\/industrial1\/titanium-fastener\/\">Titanium Fastener<\/a><\/li>\n<li><a href=\"\/industrial1\/titanium-elliptical-spherical-head\/\">Titanium Elliptical \/ Spherical Head<\/a><\/li>\n<li><a href=\"\/industrial1\/titanium-machining-parts\/\">Titanium Machining Parts<\/a><\/li>\n<li><a href=\"\/industrial1\/titanium-clad-plate\/\">Titanium Clad Plate<\/a><\/li>\n<li><a href=\"\/industrial1\/titanium-clad-copper-bar\/\">Titanium Clad Copper Bar<\/a><\/li>\n<\/ul>\n<\/li>\n<li>\n<div class=\"so-acc-btn soopen\">Other Metals <span class=\"soarrow\">&#9660;<\/span><\/div>\n<ul class=\"so-sub1 soopen\">\n<li>\n<div class=\"so-acc-btn2\">Copper Alloys <span class=\"soarrow2\">&#9660;<\/span><\/div>\n<ul class=\"so-sub2\">\n<li><a href=\"\/industrial1\/about-copper-and-copper-alloys\/\">About Copper and Copper Alloys<\/a><\/li>\n<li><a href=\"\/industrial1\/copper-alloys-tubes-and-pipes\/\">Copper Alloys Tubes and Pipes<\/a><\/li>\n<\/ul>\n<\/li>\n<li>\n<div class=\"so-acc-btn2\">Nickel Alloys <span class=\"soarrow2\">&#9660;<\/span><\/div>\n<ul class=\"so-sub2\">\n<li><a href=\"\/industrial1\/about-nickel-and-nickel-alloys\/\">About Nickel and Nickel Alloys<\/a><\/li>\n<li><a href=\"\/industrial1\/nickel-alloys-tubes-and-pipes\/\">Nickel Alloys Tubes and Pipes<\/a><\/li>\n<\/ul>\n<\/li>\n<li>\n<div class=\"so-acc-btn2 soopen\">Stainless Steels <span class=\"soarrow2\">&#9660;<\/span><\/div>\n<ul class=\"so-sub2 soopen\">\n<li><a href=\"\/industrial1\/about-stainless-steels\/\" class=\"so-active\">About Stainless Steels<\/a><\/li>\n<li><a href=\"\/industrial1\/stainless-steels-tubes-and-pipes\/\">Stainless Steels Tubes and Pipes<\/a><\/li>\n<\/ul>\n<\/li>\n<li>\n<div class=\"so-acc-btn2\">Carbon Steels <span class=\"soarrow2\">&#9660;<\/span><\/div>\n<ul class=\"so-sub2\">\n<li><a href=\"\/industrial1\/about-carbon-steels\/\">About Carbon Steels<\/a><\/li>\n<li><a href=\"\/industrial1\/carbon-steels-tubes-and-pipes\/\">Carbon Steels Tubes and Pipes<\/a><\/li>\n<\/ul>\n<\/li>\n<li>\n<div class=\"so-acc-btn2\">Zirconium <span class=\"soarrow2\">&#9660;<\/span><\/div>\n<ul class=\"so-sub2\">\n<li><a href=\"\/industrial1\/about-zirconium-alloys\/\">About Zirconium Alloys<\/a><\/li>\n<li><a href=\"\/industrial1\/zirconium-alloy-tubes-and-pipes\/\">Zirconium Alloy Tubes and Pipes<\/a><\/li>\n<li><a href=\"\/industrial1\/zirconium-alloy-plate-and-sheet\/\">Zirconium Alloy Plate and Sheet<\/a><\/li>\n<\/ul>\n<\/li>\n<li>\n<div class=\"so-acc-btn2\">Niobium <span class=\"soarrow2\">&#9660;<\/span><\/div>\n<ul class=\"so-sub2\">\n<li><a href=\"\/industrial1\/about-niobium-alloys\/\">About Niobium Alloys<\/a><\/li>\n<li><a href=\"\/industrial1\/niobium-alloy-tubes-and-pipes\/\">Niobium Alloy Tubes and Pipes<\/a><\/li>\n<li><a href=\"\/industrial1\/niobium-alloy-plate-and-sheet\/\">Niobium Alloy Plate and Sheet<\/a><\/li>\n<\/ul>\n<\/li>\n<li>\n<div class=\"so-acc-btn2\">Tantalum <span class=\"soarrow2\">&#9660;<\/span><\/div>\n<ul class=\"so-sub2\">\n<li><a href=\"\/industrial1\/about-tantalum-alloys\/\">About Tantalum Alloys<\/a><\/li>\n<li><a href=\"\/industrial1\/tantalum-alloy-tubes-and-pipes\/\">Tantalum Alloy Tubes and Pipes<\/a><\/li>\n<li><a href=\"\/industrial1\/tantalum-alloy-plate-and-sheet\/\">Tantalum Alloy Plate and Sheet<\/a><\/li>\n<li><a href=\"\/industrial1\/tantalum-alloy-rod-and-bar\/\">Tantalum Alloy Rod and Bar<\/a><\/li>\n<\/ul>\n<\/li>\n<li>\n<div class=\"so-acc-btn2\">Hafnium <span class=\"soarrow2\">&#9660;<\/span><\/div>\n<ul class=\"so-sub2\">\n<li><a href=\"\/industrial1\/about-hafnium-and-hafnium-alloy\/\">About Hafnium and Hafnium Alloy<\/a><\/li>\n<li><a href=\"\/industrial1\/hafnium-alloy-tubes-and-pipes\/\">Hafnium Alloy Tubes and Pipes<\/a><\/li>\n<li><a href=\"\/industrial1\/hafnium-alloy-plate-and-sheet\/\">Hafnium Alloy Plate and Sheet<\/a><\/li>\n<\/ul>\n<\/li>\n<li><a href=\"\/industrial1\/magnesium\/\" style=\"display:block;padding:8px 14px 8px 24px;font-size:12.5px;color:#034170;text-decoration:none;border-bottom:1px solid #eef1f6;\">Magnesium<\/a><\/li>\n<\/ul>\n<\/li>\n<\/ul>\n<\/aside>\n<p>  <main class=\"so-article\"><\/p>\n<div class=\"so-article-header\">\n<h2>About Stainless Steels<\/h2>\n<\/div>\n<p>Stainless steel is a family of iron-based alloys containing a minimum of approximately 11% chromium \u2014 the element responsible for its resistance to rust and its heat-resistant properties. Depending on grade, stainless steels may also include carbon, nitrogen, nickel, molybdenum, titanium, niobium, copper, silicon, sulfur, aluminium and selenium in varying proportions. Individual grades are usually identified by a three-digit number, such as 304 or 316.<\/p>\n<p>Corrosion resistance comes from chromium forming a thin, self-healing passive oxide film on the metal&#8217;s surface. This film continuously regenerates in the presence of oxygen, protecting the base metal from attack. Because of this resistance to corrosion and staining, combined with low maintenance and a clean, familiar finish, stainless steel is used across countless industries \u2014 supplied as sheet, plate, bar, wire, or tube \u2014 wherever both strength and durability are required.<\/p>\n<div class=\"so-callout\">\n<h4>What Strengthens Corrosion Resistance<\/h4>\n<ul>\n<li>Increasing chromium content above 11%<\/li>\n<li>Adding 8% or more nickel<\/li>\n<li>Adding molybdenum, which also improves resistance to pitting corrosion<\/li>\n<li>Adding nitrogen, which improves pitting resistance and mechanical strength<\/li>\n<\/ul><\/div>\n<h3>Stainless Steel Series at a Glance<\/h3>\n<div class=\"so-table-scroll\">\n<table class=\"so-spec-table\">\n<tr>\n<th>Series<\/th>\n<th>Common Grades<\/th>\n<th>Characteristics<\/th>\n<\/tr>\n<tr>\n<td>200 Series<br \/>(Austenitic Cr-Ni-Mn)<\/td>\n<td>201, 202<\/td>\n<td>Cold-work hardenable, general-purpose, more economical alternative to 300 series grades<\/td>\n<\/tr>\n<tr>\n<td rowspan=\"3\">300 Series<br \/>(Austenitic Cr-Ni)<\/td>\n<td>304 \/ 304L<\/td>\n<td>The classic 18\/8 grade and the most widely used stainless steel; 304L carries lower carbon for better weldability<\/td>\n<\/tr>\n<tr>\n<td>316 \/ 316L<\/td>\n<td>Known as marine grade \u2014 molybdenum addition resists chloride corrosion and pitting; used in food, surgical and nuclear reprocessing applications<\/td>\n<\/tr>\n<tr>\n<td>321<\/td>\n<td>Titanium-stabilised version of 304 with lower risk of weld decay at elevated temperatures<\/td>\n<\/tr>\n<tr>\n<td rowspan=\"4\">400 Series<br \/>(Ferritic \/ Martensitic)<\/td>\n<td>409<\/td>\n<td>Most economical grade; widely used for automotive exhaust systems<\/td>\n<\/tr>\n<tr>\n<td>410 \/ 420<\/td>\n<td>Hardenable martensitic grades with good wear resistance; used in cutlery and tooling<\/td>\n<\/tr>\n<tr>\n<td>430<\/td>\n<td>Decorative ferritic grade with good formability, e.g. automotive trim<\/td>\n<\/tr>\n<tr>\n<td>440A \/ 440B \/ 440C<\/td>\n<td>High-carbon martensitic grades hardenable to roughly 58 HRC; used in cutting tools and blades<\/td>\n<\/tr>\n<tr>\n<td>600 Series<br \/>(Precipitation Hardening)<\/td>\n<td>630 (17-4 PH)<\/td>\n<td>Combines high strength with corrosion resistance through an age-hardening heat treatment<\/td>\n<\/tr>\n<tr>\n<td>900 Series<br \/>(Austenitic Cr-Mo)<\/td>\n<td>904<\/td>\n<td>Higher chromium and molybdenum content than 316 for superior corrosion resistance<\/td>\n<\/tr>\n<\/table><\/div>\n<p>Spreadon supplies austenitic, ferritic, martensitic, duplex and precipitation-hardening stainless steel grades to Aerospace, Defence, Power and Industrial customers, with full traceability and mill certification on every order.<\/p>\n<p>  <\/main><\/p>\n<\/div>\n<p><script>\njQuery(document).ready(function($){\n  $('#so-acc-main').on('click', '.so-acc-btn', function(){\n    var $btn = $(this);\n    var $sub = $btn.next('.so-sub1');\n    var isOpen = $btn.hasClass('soopen');\n    $('#so-acc-main').find('.so-acc-btn').removeClass('soopen');\n    $('#so-acc-main').find('.so-sub1').removeClass('soopen');\n    if(!isOpen){\n      $btn.addClass('soopen');\n      $sub.addClass('soopen');\n    }\n  });\n  $(document).on('click', '.so-acc-btn2', function(){\n    var $btn = $(this);\n    var $sub = $btn.next('.so-sub2');\n    $btn.toggleClass('soopen');\n    $sub.toggleClass('soopen');\n  });\n});\n<\/script><\/p>\n","protected":false},"excerpt":{"rendered":"<p>Product Categories Pure Titanium &amp; Alloys &#9660; About Titanium Titanium Tube and Pipe Titanium Strip, Sheet &amp; Plate Titanium Bar and Rod Titanium Welded Wire and Wire Titanium Foil Titanium Forging Titanium Flange Titanium Pipe Fittings Titanium Casting Titanium Fastener Titanium Elliptical \/ Spherical Head Titanium Machining Parts Titanium Clad Plate Titanium Clad Copper Bar<\/p>\n","protected":false},"author":1,"featured_media":0,"parent":0,"menu_order":0,"comment_status":"closed","ping_status":"closed","template":"","meta":{"footnotes":""},"class_list":["post-7021","page","type-page","status-publish","hentry"],"_links":{"self":[{"href":"https:\/\/www.spreadon.net\/industrial1\/wp-json\/wp\/v2\/pages\/7021","targetHints":{"allow":["GET"]}}],"collection":[{"href":"https:\/\/www.spreadon.net\/industrial1\/wp-json\/wp\/v2\/pages"}],"about":[{"href":"https:\/\/www.spreadon.net\/industrial1\/wp-json\/wp\/v2\/types\/page"}],"author":[{"embeddable":true,"href":"https:\/\/www.spreadon.net\/industrial1\/wp-json\/wp\/v2\/users\/1"}],"replies":[{"embeddable":true,"href":"https:\/\/www.spreadon.net\/industrial1\/wp-json\/wp\/v2\/comments?post=7021"}],"version-history":[{"count":1,"href":"https:\/\/www.spreadon.net\/industrial1\/wp-json\/wp\/v2\/pages\/7021\/revisions"}],"predecessor-version":[{"id":7022,"href":"https:\/\/www.spreadon.net\/industrial1\/wp-json\/wp\/v2\/pages\/7021\/revisions\/7022"}],"wp:attachment":[{"href":"https:\/\/www.spreadon.net\/industrial1\/wp-json\/wp\/v2\/media?parent=7021"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}