{"id":275,"date":"2025-06-11T03:09:34","date_gmt":"2025-06-11T03:09:34","guid":{"rendered":"https:\/\/dura-alloy.com\/?post_type=product&p=275"},"modified":"2025-06-11T03:09:34","modified_gmt":"2025-06-11T03:09:34","slug":"309s","status":"publish","type":"product","link":"https:\/\/www.dura-alloy.com\/ko\/product\/309s\/","title":{"rendered":"309S"},"content":{"rendered":"

Our company’s scope of supply includes<\/span><\/strong><\/p>\n

Non-standard forgings, round rods, steel plates\/steel belts, flange pipe fittings, seamless pipes, capillaries, etc. Welcome to inquire!<\/span><\/strong><\/p>\n

1.\u00a0<\/span><\/strong>Introduction to 309S materials<\/span><\/strong><\/p>\n

309S is a easily-cut stainless steel containing sulfur, which is used in occasions where easy cutting and high surface finish are mainly required. 309s is a variant of 309 stainless steel with a low carbon content and is used in situations where welding is required. Lower carbon content minimizes the precipitation of carbides in the heat-affected zone near the weld, and precipitation of carbides can cause intergranular corrosion (welding erosion) of stainless steel in certain environments.<\/span><\/p>\n

Its high chromium content and nickel content ensure good corrosion resistance and oxidation resistance. Compared with the austenite 304 alloy, it is slightly stronger at room temperature.<\/span><\/p>\n

2. 309S chemical composition<\/span><\/strong><\/p>\n\n\n\n\n\n
\ud569\uae08<\/span><\/td>\n%<\/span><\/td>\n\ud06c\ub86c Cr<\/span><\/td>\n\ud0c4\uc18c C<\/span><\/td>\n\ub9dd\uac04 Mn<\/span><\/td>\n\uc2e4\ub9ac\ucf58 Si<\/span><\/td>\n\uc778 P<\/span><\/td>\n\uc720\ud669 S<\/span><\/td>\nNi<\/span><\/td>\n\ud2f0\ud0c0\ub284 Ti<\/span><\/td>\n<\/tr>\n
309S<\/span><\/td>\n\ucd5c\uc18c\uac12<\/span><\/td>\n17.0<\/span><\/td>\n–<\/span><\/td>\n–<\/span><\/td>\n–<\/span><\/td>\n–<\/span><\/td>\n–<\/span><\/td>\n9.0<\/span><\/td>\n5*C%<\/span><\/td>\n<\/tr>\n
\ucd5c\ub300 \uac12<\/span><\/td>\n19.0<\/span><\/td>\n0.08<\/span><\/td>\n2.00<\/span><\/td>\n1.00<\/span><\/td>\n0.035<\/span><\/td>\n0.030<\/span><\/td>\n12.0<\/span><\/td>\n–<\/span><\/td>\n<\/tr>\n<\/tbody>\n<\/table>\n

3. 309S mechanical properties<\/span><\/strong><\/p>\n

Tensile strength \u03c3b (MPa): \u2265520<\/span><\/p>\n

Conditional yield strength \u03c30.2 (MPa): \u2265205<\/span><\/p>\n

Elongation \u03b45 (%): \u226540<\/span><\/p>\n

Section shrinkage \u03c8 (%): \u226550<\/span><\/p>\n

Hardness: \u2264187HB; \u226490HRB; \u2264200HV<\/span><\/p>\n

Heat treatment specifications and metallographic structure:<\/span><\/p>\n

Heat treatment specifications: 1) Solid solution 920~1150\u2103 quickly cooled; 2) Stabilization treatment can be carried out according to the requirements of the demand party, and the heat treatment temperature is 850~930\u2103, but it must be noted in the contract.<\/span><\/p>\n

Metallographic structure: The structure is characterized by austenite type.<\/span><\/p>\n

Delivery status: Generally delivered in a heat treatment state, the type of heat treatment is indicated in the contract; if not specified, the delivery shall be carried out in a heat treatment state.<\/span><\/p>\n

4. 309S application field<\/span><\/strong><\/p>\n

\u00a0 \u00a0 \u00a0 Widely used in important fields such as boilers, energy (nuclear power, thermal power, fuel cells), industrial furnaces, incinerators, heating furnaces, chemicals, petrochemicals and other important fields.<\/span><\/p>","protected":false},"excerpt":{"rendered":"

Our company’s scope of supply includes Non-standard forgings, round rods, steel plates\/steel belts, flange pipe fittings, seamless pipes, capillaries, etc. […]<\/p>","protected":false},"featured_media":276,"template":"","meta":{"site-sidebar-layout":"default","site-content-layout":"","ast-site-content-layout":"default","site-content-style":"default","site-sidebar-style":"default","ast-global-header-display":"","ast-banner-title-visibility":"","ast-main-header-display":"","ast-hfb-above-header-display":"","ast-hfb-below-header-display":"","ast-hfb-mobile-header-display":"","site-post-title":"","ast-breadcrumbs-content":"","ast-featured-img":"","footer-sml-layout":"","theme-transparent-header-meta":"default","adv-header-id-meta":"","stick-header-meta":"","header-above-stick-meta":"","header-main-stick-meta":"","header-below-stick-meta":"","astra-migrate-meta-layouts":"set","ast-page-background-enabled":"default","ast-page-background-meta":{"desktop":{"background-color":"var(--ast-global-color-5)","background-image":"","background-repeat":"repeat","background-position":"center center","background-size":"auto","background-attachment":"scroll","background-type":"","background-media":"","overlay-type":"","overlay-color":"","overlay-opacity":"","overlay-gradient":""},"tablet":{"background-color":"","background-image":"","background-repeat":"repeat","background-position":"center center","background-size":"auto","background-attachment":"scroll","background-type":"","background-media":"","overlay-type":"","overlay-color":"","overlay-opacity":"","overlay-gradient":""},"mobile":{"background-color":"","background-image":"","background-repeat":"repeat","background-position":"center center","background-size":"auto","background-attachment":"scroll","background-type":"","background-media":"","overlay-type":"","overlay-color":"","overlay-opacity":"","overlay-gradient":""}},"ast-content-background-meta":{"desktop":{"background-color":"var(--ast-global-color-4)","background-image":"","background-repeat":"repeat","background-position":"center center","background-size":"auto","background-attachment":"scroll","background-type":"","background-media":"","overlay-type":"","overlay-color":"","overlay-opacity":"","overlay-gradient":""},"tablet":{"background-color":"var(--ast-global-color-4)","background-image":"","background-repeat":"repeat","background-position":"center center","background-size":"auto","background-attachment":"scroll","background-type":"","background-media":"","overlay-type":"","overlay-color":"","overlay-opacity":"","overlay-gradient":""},"mobile":{"background-color":"var(--ast-global-color-4)","background-image":"","background-repeat":"repeat","background-position":"center center","background-size":"auto","background-attachment":"scroll","background-type":"","background-media":"","overlay-type":"","overlay-color":"","overlay-opacity":"","overlay-gradient":""}}},"product_brand":[],"product_cat":[30],"product_tag":[],"class_list":{"0":"post-275","1":"product","2":"type-product","3":"status-publish","4":"has-post-thumbnail","6":"product_cat-advanced-stainless-steel","7":"desktop-align-left","8":"tablet-align-left","9":"mobile-align-left","11":"first","12":"instock","13":"shipping-taxable","14":"product-type-simple"},"_links":{"self":[{"href":"https:\/\/www.dura-alloy.com\/ko\/wp-json\/wp\/v2\/product\/275","targetHints":{"allow":["GET"]}}],"collection":[{"href":"https:\/\/www.dura-alloy.com\/ko\/wp-json\/wp\/v2\/product"}],"about":[{"href":"https:\/\/www.dura-alloy.com\/ko\/wp-json\/wp\/v2\/types\/product"}],"version-history":[{"count":0,"href":"https:\/\/www.dura-alloy.com\/ko\/wp-json\/wp\/v2\/product\/275\/revisions"}],"wp:featuredmedia":[{"embeddable":true,"href":"https:\/\/www.dura-alloy.com\/ko\/wp-json\/wp\/v2\/media\/276"}],"wp:attachment":[{"href":"https:\/\/www.dura-alloy.com\/ko\/wp-json\/wp\/v2\/media?parent=275"}],"wp:term":[{"taxonomy":"product_brand","embeddable":true,"href":"https:\/\/www.dura-alloy.com\/ko\/wp-json\/wp\/v2\/product_brand?post=275"},{"taxonomy":"product_cat","embeddable":true,"href":"https:\/\/www.dura-alloy.com\/ko\/wp-json\/wp\/v2\/product_cat?post=275"},{"taxonomy":"product_tag","embeddable":true,"href":"https:\/\/www.dura-alloy.com\/ko\/wp-json\/wp\/v2\/product_tag?post=275"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}