{"id":2996,"date":"2025-06-17T15:05:45","date_gmt":"2025-06-17T07:05:45","guid":{"rendered":"https:\/\/www.rbymetal.com\/?post_type=product&p=2996"},"modified":"2025-06-17T15:07:01","modified_gmt":"2025-06-17T07:07:01","slug":"aisi-sae-4340-alloy-steel-bar","status":"publish","type":"product","link":"https:\/\/www.rbymetal.com\/index.php\/product\/aisi-sae-4340-alloy-steel-bar\/","title":{"rendered":"AISI\/SAE 4340 Alloy Steel Bar"},"content":{"rendered":"

AISI\/SAE 4340 Alloy Steel Bar Description<\/strong><\/b><\/h2>\n

AISI\u00a04340 is a commonly used alloy steel with high strength, high toughness, good wear resistance and corrosion resistance. Its moderate carbon content gives it good machinability and weldability. In addition, it also contains appropriate amounts of chromium, nickel and other elements, which further improves its performance.\u00a0At the same time, its toughness and ductility are also quite good, and it can maintain good performance even in both high or low temperature environments. Due to the excellent physical and mechanical properties of 4340 steel, 4340 steel bars are also widely used in equipment manufacturing in corrosive environments such as petroleum, chemical industry, and ships.<\/p>\n

\nProduct Parameters<\/strong><\/b><\/p>\n\n\n\n\n\n\n\n\n\n\n\n\n\n\n
Product Name<\/td>\nAISI\/SAE 4340 Alloy Steel Bar<\/td>\n<\/tr>\n
Standard<\/td>\nEN\/DIN\/JIS\/ASTM\/BS\/ASME\/AISI, etc.<\/td>\n<\/tr>\n
Common Round Bar Specifications<\/td>\n3.0-50.8 mm,\u00a0Over 50.8-300mm<\/td>\n<\/tr>\n
Flat Steel\u00a0Common\u00a0Specifications<\/td>\n6.35×12.7mm, 6.35×25.4mm, 12.7×25.4mm<\/td>\n<\/tr>\n
Hexagon Bar\u00a0Common\u00a0Specifications<\/td>\nAF5.8mm-17mm<\/td>\n<\/tr>\n
Square Bar\u00a0Common\u00a0Specifications<\/td>\nAF2mm-14mm, AF6.35mm,\u00a09.5mm, 12.7mm, 15.98mm, 19.0mm, 25.4mm<\/td>\n<\/tr>\n
Length<\/td>\n1-6meters,\u00a0Size Accept Custom<\/td>\n<\/tr>\n
Diameter(mm)<\/td>\nHot Rolling Round Bar<\/td>\n25-600<\/td>\nCold Rolling\u00a0Square Bar<\/td>\n6-50.8<\/td>\n<\/tr>\n
Hot Rolling\u00a0Square Bar<\/td>\n21-54<\/td>\nCold Rolling\u00a0Hexagon Bar<\/td>\n9.5-65<\/td>\n<\/tr>\n
Cold Rolling\u00a0Round bar<\/td>\n6-101.6<\/td>\nForged Rebar<\/td>\n200-1000<\/td>\n<\/tr>\n
Surface\u00a0Process<\/td>\nBright, Polished, Black<\/td>\n<\/tr>\n
Other Services<\/td>\nMachining(cnc), Centerless Grinding(cg), Heat Treatment, Annealing, Pickling, Polishing, Rolling, Forging, Cutting, Bending, Small Machining, etc.<\/td>\n<\/tr>\n<\/tbody>\n<\/table>\n

\n

Chemical Composition<\/strong><\/b><\/p>\n\n\n\n\n
Grade<\/td>\nMn<\/td>\nS<\/td>\nC<\/td>\nP<\/td>\nSi<\/td>\nCr<\/td>\nNi<\/td>\n<\/tr>\n
AISI\u00a04340<\/td>\n0.60-0.80<\/td>\n0.035<\/td>\n0.38-0.43<\/td>\n0.04<\/td>\n0.15-0.35<\/td>\n0.70-0.90<\/td>\n1.65-2.00<\/td>\n<\/tr>\n<\/tbody>\n<\/table>\n

\n

Mechanical Properties<\/strong><\/b><\/p>\n\n\n\n\n
Grade<\/td>\nTensile Strength\u00a0kg f\/mm2<\/td>\nYield Strength\u00a0kg f\/mm2<\/td>\nElongation\u00a0%<\/td>\nHardness HB<\/td>\n<\/tr>\n
AISI\u00a04340<\/td>\n\u2265 100<\/td>\n\u2265 90<\/td>\n\u2265 16<\/td>\n293-352<\/td>\n<\/tr>\n<\/tbody>\n<\/table>\n

\n

Scope of Application<\/strong><\/b><\/p>\n

AISI 4340 alloy steel is mainly used for power transmission gears and shafts, aircraft landing gear and other structural parts.<\/p>\n","protected":false},"excerpt":{"rendered":"

AISI 4340 carbon steel bar is made of a heat treatable low alloy steel containing chromium, nickel and molybdenum. It has high toughness and high strength under heat treatment conditions.<\/p>\n","protected":false},"featured_media":2938,"template":"","meta":{"_kad_blocks_custom_css":"","_kad_blocks_head_custom_js":"","_kad_blocks_body_custom_js":"","_kad_blocks_footer_custom_js":"","_kadence_starter_templates_imported_post":false,"_kad_post_transparent":"default","_kad_post_title":"","_kad_post_layout":"default","_kad_post_sidebar_id":"","_kad_post_content_style":"default","_kad_post_vertical_padding":"default","_kad_post_feature":"","_kad_post_feature_position":"","_kad_post_header":false,"_kad_post_footer":false},"product_brand":[],"product_cat":[31,50,29],"product_tag":[],"class_list":{"0":"post-2996","1":"product","2":"type-product","3":"status-publish","4":"has-post-thumbnail","6":"product_cat-carbon-steel","7":"product_cat-carbon-steel-bar-rod","8":"product_cat-product","10":"first","11":"instock","12":"shipping-taxable","13":"product-type-simple","14":"entry","15":"content-bg","16":"loop-entry"},"taxonomy_info":{"product_cat":[{"value":31,"label":"Carbon Steel"},{"value":50,"label":"Carbon Steel Bar\/Rod"},{"value":29,"label":"Product"}]},"featured_image_src_large":["https:\/\/www.rbymetal.com\/wp-content\/uploads\/2025\/06\/H72d98543e4644b86abcc946b4e59747.jpg",700,700,false],"author_info":[],"comment_info":"","jetpack_sharing_enabled":true,"_links":{"self":[{"href":"https:\/\/www.rbymetal.com\/index.php\/wp-json\/wp\/v2\/product\/2996","targetHints":{"allow":["GET"]}}],"collection":[{"href":"https:\/\/www.rbymetal.com\/index.php\/wp-json\/wp\/v2\/product"}],"about":[{"href":"https:\/\/www.rbymetal.com\/index.php\/wp-json\/wp\/v2\/types\/product"}],"wp:featuredmedia":[{"embeddable":true,"href":"https:\/\/www.rbymetal.com\/index.php\/wp-json\/wp\/v2\/media\/2938"}],"wp:attachment":[{"href":"https:\/\/www.rbymetal.com\/index.php\/wp-json\/wp\/v2\/media?parent=2996"}],"wp:term":[{"taxonomy":"product_brand","embeddable":true,"href":"https:\/\/www.rbymetal.com\/index.php\/wp-json\/wp\/v2\/product_brand?post=2996"},{"taxonomy":"product_cat","embeddable":true,"href":"https:\/\/www.rbymetal.com\/index.php\/wp-json\/wp\/v2\/product_cat?post=2996"},{"taxonomy":"product_tag","embeddable":true,"href":"https:\/\/www.rbymetal.com\/index.php\/wp-json\/wp\/v2\/product_tag?post=2996"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}