{"id":497,"date":"2012-12-18T13:07:47","date_gmt":"2012-12-18T13:07:47","guid":{"rendered":"https:\/\/e-marineeducation.com\/en\/?p=497"},"modified":"2013-12-11T14:49:50","modified_gmt":"2013-12-11T12:49:50","slug":"construction-materials-for-ship-propeller","status":"publish","type":"post","link":"https:\/\/e-marineeducation.com\/en\/construction-materials-for-ship-propeller\/","title":{"rendered":"Construction Materials for Ship Propeller"},"content":{"rendered":"<p style=\"text-align: justify;\"><img loading=\"lazy\" decoding=\"async\" class=\"alignleft\" alt=\"\" src=\"http:\/\/e-marineeducation.com\/en\/wp-content\/uploads\/2012\/07\/By-Aybars-Oru%C3%A7.png\" width=\"264\" height=\"65\" \/>There exist quite various types of constructual materials that are used for ship propellers. Whereas, the propellers used by Merchant vessels are usually divided into two main groups based on the construction materials used. These are:<\/p>\n<table style=\"height: 20px;\" border=\"0\">\n<tbody>\n<tr>\n<td><\/td>\n<\/tr>\n<\/tbody>\n<\/table>\n<p style=\"text-align: justify;\"><strong>1.<\/strong> Aluminum &#8211; Bronze alloyed propellers<\/p>\n<p style=\"text-align: justify;\"><strong>2.<\/strong> Manganese &#8211; Bronze alloyed propellers<\/p>\n<table style=\"height: 20px;\" border=\"0\">\n<tbody>\n<tr>\n<td><\/td>\n<\/tr>\n<\/tbody>\n<\/table>\n<p style=\"text-align: justify;\">Other than these, the propellers made of cast iron and cast steel are also rarely seen.<\/p>\n<table style=\"height: 20px;\" border=\"0\">\n<tbody>\n<tr>\n<td><\/td>\n<\/tr>\n<\/tbody>\n<\/table>\n<p style=\"text-align: justify;\">Aluminum &#8211; Bronze alloyed propellers are approximately 10% lighter compared to Manganese &#8211; Bronze alloyed propellers and in fact, this is a factor that reduces the ship&#8217;s daily fuel expenditure.<\/p>\n<table style=\"height: 20px;\" border=\"0\">\n<tbody>\n<tr>\n<td><\/td>\n<\/tr>\n<\/tbody>\n<\/table>\n<p style=\"text-align: justify;\">As it is known, cavitation occurs at the propellers and hence maintenance is time to time required. Because the material of the aluminum &#8211; bronze propeller is much more resistant to cavitation then the acquisition costs of the maintenance of Aluminum &#8211; Bronze alloyed propellers are quite lower than that of Manganese &#8211; Bronze alloyed propellers.<\/p>\n<table style=\"height: 20px;\" border=\"0\">\n<tbody>\n<tr>\n<td><\/td>\n<\/tr>\n<\/tbody>\n<\/table>\n<p style=\"text-align: justify;\">Aluminum &#8211; Bronze propellers can easily be maintained. Pittings due to cavitation can also easily be filled by the welding rods. Pre-heating is not necessary.<\/p>\n<table style=\"height: 20px;\" border=\"0\">\n<tbody>\n<tr>\n<td><\/td>\n<\/tr>\n<\/tbody>\n<\/table>\n<p style=\"text-align: justify;\">Aluminum &#8211; Bronze propellers are more expensive but during long-term operation they will pay off that difference.<\/p>\n<table style=\"height: 20px;\" border=\"0\">\n<tbody>\n<tr>\n<td><\/td>\n<\/tr>\n<\/tbody>\n<\/table>\n<p style=\"text-align: justify;\">Because of the low cost of the maintenance, the manganese &#8211; bronze alloyed propellers are widely used in commercial vessels, however due to all above stated reasons, the aluminum &#8211; bronze alloyed propellers are more advantageous than the manganese &#8211; bronze alloyed ones.<\/p>\n<table style=\"height: 20px;\" border=\"0\">\n<tbody>\n<tr>\n<td><\/td>\n<\/tr>\n<\/tbody>\n<\/table>\n<p><strong>Chemical Composition<\/strong><\/p>\n<table style=\"height: 20px;\" border=\"0\">\n<tbody>\n<tr>\n<td><\/td>\n<\/tr>\n<\/tbody>\n<\/table>\n<div align=\"center\">\n<table style=\"border-collapse: collapse; width: 493px;\" border=\"1\">\n<tbody>\n<tr>\n<td width=\"209\"><b>\u00a0Element \/ Propeller Material<\/b><\/td>\n<td align=\"center\" width=\"140\"><b>Aluminium &#8211; Bronze<\/b><\/td>\n<td align=\"center\" width=\"140\"><b>Manganese &#8211; Bronze<\/b><\/td>\n<\/tr>\n<tr>\n<td width=\"209\"><b>\u00a0Copper<\/b><\/td>\n<td align=\"center\" width=\"140\">%78 &#8211; %81<\/td>\n<td align=\"center\" width=\"140\">%55 &#8211; %60<\/td>\n<\/tr>\n<tr>\n<td width=\"209\"><b>\u00a0Zinc<\/b><\/td>\n<td align=\"center\" width=\"140\">%0.37 &#8211; %0.62<\/td>\n<td align=\"center\" width=\"140\">%35 &#8211; %40<\/td>\n<\/tr>\n<tr>\n<td width=\"209\"><b>\u00a0Nickel<\/b><\/td>\n<td align=\"center\" width=\"140\">%4.5 &#8211; %5.5<\/td>\n<td align=\"center\" width=\"140\">%4.3<\/td>\n<\/tr>\n<tr>\n<td width=\"209\"><b>\u00a0<b>Iron<\/b><\/b><\/td>\n<td align=\"center\" width=\"140\">%3.5 &#8211; %5.5<\/td>\n<td align=\"center\" width=\"140\">%0.9 &#8211; %2.0<\/td>\n<\/tr>\n<tr>\n<td width=\"209\"><b>\u00a0<b>Manganese<\/b><\/b><\/td>\n<td align=\"center\" width=\"140\">%0.5 &#8211; %1.0<\/td>\n<td align=\"center\" width=\"140\">%0.3 &#8211; %0.9<\/td>\n<\/tr>\n<tr>\n<td width=\"209\"><b>\u00a0<b>Aluminum<\/b><\/b><\/td>\n<td align=\"center\" width=\"140\">%9.0 &#8211; %10.3<\/td>\n<td align=\"center\" width=\"140\">%0.7 &#8211; %1.0<\/td>\n<\/tr>\n<tr>\n<td width=\"209\"><b>\u00a0<b>Lead<\/b><\/b><\/td>\n<td align=\"center\" width=\"140\">%0.01 max.<\/td>\n<td align=\"center\" width=\"140\">%0.4 max.<\/td>\n<\/tr>\n<tr>\n<td width=\"209\"><b>\u00a0<b>Tin<\/b><\/b><\/td>\n<td align=\"center\" width=\"140\">&#8211; &#8211; &#8211;<\/td>\n<td align=\"center\" width=\"140\">%1.5 max<\/td>\n<\/tr>\n<tr>\n<td width=\"209\"><b>\u00a0Other<\/b><\/td>\n<td align=\"center\" width=\"140\">%0.5 max<\/td>\n<td align=\"center\" width=\"140\">&#8211; &#8211; &#8211;<\/td>\n<\/tr>\n<\/tbody>\n<\/table>\n<table style=\"height: 20px;\" border=\"0\">\n<tbody>\n<tr>\n<td><\/td>\n<\/tr>\n<\/tbody>\n<\/table>\n<p style=\"text-align: left;\"><strong>Translation By: <a href=\"https:\/\/e-marineeducation.com\/en\/profile-huseyin-sahin\/\" target=\"_blank\"><span style=\"text-decoration: underline;\"><span style=\"color: #3366cc; text-decoration: underline;\">Huseyin Sahin<\/span><\/span><\/a><\/strong><\/p>\n<\/div>\n","protected":false},"excerpt":{"rendered":"<p>There exist quite various types of constructual materials that are used for ship propellers. Whereas, the propellers used by Merchant vessels are usually divided into two main groups based on the construction materials used. These are: 1. Aluminum &#8211; Bronze alloyed propellers 2. Manganese &#8211; Bronze alloyed propellers Other than these, the propellers made of [&hellip;]<\/p>\n","protected":false},"author":1,"featured_media":487,"comment_status":"open","ping_status":"open","sticky":false,"template":"","format":"standard","meta":{"footnotes":""},"categories":[37],"tags":[138,102,101,57],"class_list":["post-497","post","type-post","status-publish","format-standard","has-post-thumbnail","hentry","category-especial-articles","tag-huseyin-sahins-translations","tag-material","tag-propeller","tag-technical-articles-2"],"yoast_head":"<!-- This site is optimized with the Yoast SEO plugin v27.4 - https:\/\/yoast.com\/product\/yoast-seo-wordpress\/ -->\n<title>Construction Materials for Ship Propeller | E-Marine Education<\/title>\n<meta name=\"description\" content=\"In this article, ship proppeller materials are explained.\" \/>\n<meta name=\"robots\" content=\"index, follow, max-snippet:-1, max-image-preview:large, max-video-preview:-1\" \/>\n<link rel=\"canonical\" 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