{"id":2237,"date":"2021-08-06T06:41:21","date_gmt":"2021-08-06T06:41:21","guid":{"rendered":"https:\/\/wldstainless.com\/?p=2237"},"modified":"2021-08-06T06:41:21","modified_gmt":"2021-08-06T06:41:21","slug":"is-318ln-a-type-duplex-stainless-steel-grades","status":"publish","type":"post","link":"https:\/\/wldstainless.com\/id\/is-318ln-a-type-duplex-stainless-steel-grades\/","title":{"rendered":"Apakah 318LN merupakan jenis kelas baja stainless steel duplex?"},"content":{"rendered":"<p>318LN adalah baja stainless yang diperkaya nitrogen yang umumnya digunakan untuk mengatasi kegagalan korosi pada baja stainless seri 300. Struktur baja stainless 318LN terdiri dari Austenite yang dikelilingi oleh fase Ferrite yang terus menerus. 318LN mengandung sekitar 40-50% Ferrite dalam kondisi annealed dan dapat dianggap sebagai baja stainless duplex. Struktur duplex ini menggabungkan paduan ferrit (ketahanan terhadap korosi stres dan kekuatan tinggi) dengan kualitas unggul dari paduan Austenitic (mudah diproduksi dan tahan korosi). 318LN tahan terhadap korosi seragam H2S, stres korosi sulfida, kelembutan hidrogen dan korosi media reduksi. Hal ini umumnya digunakan untuk memproduksi kepala sumur, katup, batang, dan sekrup yang tahan terhadap sulfur guna digunakan di lingkungan pertambangan di mana tekanan parsial H2S melebihi 1MPa. Namun, penggunaan baja stainless duplex 318LN sebaiknya dibatasi di bawah suhu 600\u00b0F karena suhu tinggi yang berkepanjangan dapat membuat baja stainless 318LN menjadi rapuh.<\/p>\n<p>&nbsp;<\/p>\n<h3>Komposisi kimia baja 318LN<\/h3>\n<table>\n<tbody>\n<tr>\n<td width=\"94\">Cr<\/td>\n<td width=\"94\">Ni<\/td>\n<td width=\"94\">Mo<\/td>\n<td width=\"94\">C<\/td>\n<td width=\"94\">N<\/td>\n<td width=\"94\">Mn<\/td>\n<td width=\"94\">Si<\/td>\n<td width=\"94\">P<\/td>\n<td width=\"94\">S<\/td>\n<\/tr>\n<tr>\n<td width=\"94\">22.0-23.0<\/td>\n<td width=\"94\">4.50-6.50<\/td>\n<td width=\"94\">3.00-3.50<\/td>\n<td width=\"94\">\u22640.030<\/td>\n<td width=\"94\">0.14-0.20<\/td>\n<td width=\"94\">\u22642.00<\/td>\n<td width=\"94\">\u22641.00<\/td>\n<td width=\"94\">\u22640.030<\/td>\n<td width=\"94\">\u22640.020<\/td>\n<\/tr>\n<\/tbody>\n<\/table>\n<table>\n<tbody>\n<tr>\n<td colspan=\"4\" width=\"852\">Sifat Mekanis<\/td>\n<\/tr>\n<tr>\n<td width=\"213\">Ys (Mpa)<\/td>\n<td width=\"213\">Ts (Mpa)<\/td>\n<td width=\"213\">Perpanjangan (%)<\/td>\n<td width=\"213\">Hv<\/td>\n<\/tr>\n<tr>\n<td width=\"213\">Standar<\/td>\n<td width=\"213\">\u2265 450<\/td>\n<td width=\"213\">\u2265 620<\/td>\n<td width=\"213\">\u2265 18<\/td>\n<\/tr>\n<tr>\n<td colspan=\"4\" width=\"852\">Property fisik<\/td>\n<\/tr>\n<tr>\n<td width=\"213\">Kepadatan (g\/cm)<\/td>\n<td width=\"213\">Suhu spesifik (J\/g.C)<\/td>\n<td width=\"213\">Konduktivitas termal<\/p>\n<p>100C (W\/m.)<\/td>\n<td width=\"213\">Koefisien ekspansi termal<\/p>\n<p>20~100C (10\/C)<\/td>\n<\/tr>\n<tr>\n<td width=\"213\">7.8<\/td>\n<td width=\"213\">0.45<\/td>\n<td width=\"213\">19.0<\/td>\n<td width=\"213\">13.7<\/td>\n<\/tr>\n<\/tbody>\n<\/table>\n<p>&nbsp;<\/p>\n<h3>Fitur dari baja 318LN<\/h3>\n<ul>\n<li>Tahan terhadap korosi stres sulfida yang sangat baik<\/li>\n<li>Tahan terhadap korosi stres klorida, pitting, dan korosi retakan<\/li>\n<li>Kekuatan tinggi,<\/li>\n<li>Ketangguhan dan kemudahan kerja yang baik<\/li>\n<\/ul>\n<p>&nbsp;<\/p>\n<h3>Aplikasi baja 318LN<\/h3>\n<ul>\n<li>Container pengolahan kimia, pipa, dan penukar panas<\/li>\n<li>Pengolahan limbah pabrik pulp, pembersih pemutih, wadah pra-pengeringan chip<\/li>\n<li>Perlengkapan pengolahan makanan<\/li>\n<li>Saluran pipa petrokimia dan penukar panas<\/li>\n<li>Perangkat pemurnian gas buang<\/li>\n<\/ul>\n<p>&nbsp;<\/p>\n<p>318LN duplex stainless steel merupakan solusi ekonomis dan efektif untuk aplikasi di mana stainless steel seri 300 rentan terhadap korosi stres akibat klorida. Ketika stainless steel mengalami tegangan tarik, korosi stres akan terjadi ketika bersentuhan dengan larutan yang mengandung klorida, dan peningkatan suhu juga akan meningkatkan sensitivitas stainless steel terhadap korosi stres. Kombinasi kromium, molibdenum, dan nitrogen meningkatkan ketahanan 318LN terhadap korosi pitting dan crevice akibat klorida, yang sangat penting untuk aplikasi seperti lingkungan laut, air payau, operasi pemutihan, sistem air bergelung, dan beberapa aplikasi pengolahan makanan. Dalam sebagian besar lingkungan, kandungan kromium, molibdenum, dan nitrogen yang tinggi pada 318LN memberikan ketahanan korosi yang unggul dibandingkan dengan stainless steel biasa seperti <a href=\"https:\/\/wldstainless.com\/materials\/austenitic-stainless-steel\/316-316l-stainless-steel\/\">316L<\/a> dan 317L.<\/p>","protected":false},"excerpt":{"rendered":"<p>318LN is Nitrogen-enhanced stainless steel commonly used to address corrosion failures in 300 series stainless steel. The structure of 318LN stainless steel is composed of Austenite surrounded by continuous Ferrite phases. 318LN contains about 40-50% Ferrite in the annealed state and can be considered duplex stainless steel. The duplex structure combines ferrite alloys (stress corrosion [&hellip;]<\/p>","protected":false},"author":1,"featured_media":0,"comment_status":"open","ping_status":"open","sticky":false,"template":"","format":"standard","meta":{"footnotes":""},"categories":[23],"tags":[],"class_list":["post-2237","post","type-post","status-publish","format-standard","hentry","category-news"],"aioseo_notices":[],"aioseo_head":"\n\t\t<!-- All in One SEO 5.0.1.1 - aioseo.com -->\n\t<meta name=\"description\" content=\"318LN duplex stainless steel is an economical and effective solution for applications where 300 series stainless steels are susceptible to chloride stress corrosion cracking.\" \/>\n\t<meta name=\"robots\" content=\"max-image-preview:large\" \/>\n\t<meta name=\"author\" content=\"WLD Stainless\"\/>\n\t<link rel=\"canonical\" href=\"https:\/\/wldstainless.com\/id\/is-318ln-a-type-duplex-stainless-steel-grades\/\" \/>\n\t<meta name=\"generator\" content=\"All in One SEO (AIOSEO) 5.0.1.1\" \/>\n\t\t<script type=\"application\/ld+json\" class=\"aioseo-schema\">\n\t\t\t{\"@context\":\"https:\\\/\\\/schema.org\",\"@graph\":[{\"@type\":\"Article\",\"@id\":\"https:\\\/\\\/wldstainless.com\\\/id\\\/is-318ln-a-type-duplex-stainless-steel-grades\\\/#article\",\"name\":\"Is 318LN a type duplex stainless steel grades? 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