{"id":662607,"date":"2024-11-06T02:58:38","date_gmt":"2024-11-06T02:58:38","guid":{"rendered":"https:\/\/pdfstandards.shop\/product\/uncategorized\/jis-z-2251-12020\/"},"modified":"2024-11-06T02:58:38","modified_gmt":"2024-11-06T02:58:38","slug":"jis-z-2251-12020","status":"publish","type":"product","link":"https:\/\/pdfstandards.shop\/product\/publishers\/jis\/jis-z-2251-12020\/","title":{"rendered":"JIS Z 2251-1:2020"},"content":{"rendered":"<p>This Standard specifies the Knoop hardness test method for metallic materials for test forces from 0.009 807 N to 19.613 N. <\/p>\n<p>The Knoop hardness test specified in this Standard is for lengths of indentation diagonals 0.020 mm; it may be used for lengths of indentation diagonals &lt; 0.020 mm upon agreement between the parties involved. <strong>ISO 14577-1<\/strong> allows the determination of hardness from smaller indentations. <\/p>\n<p>A periodic verification method is specified for routine checking of the testing machine in service by the user. <\/p>\n<p>Special considerations for Knoop testing of metallic coatings can be found in <strong>ISO 4516<\/strong>. <\/p>\n<p>NOTE 1 Using the method specified in this Standard for determination from indentations &lt; 0.020 mm in diagonal length may cause large uncertainties in the results. <\/p>\n<p>NOTE 2 The International Standard corresponding to this Standard and the symbol of degree of correspondence are as follows. <\/p>\n<p>ISO 4545-1:2017 <i>Metallic materials\u2014Knoop hardness test\u2014Part 1: Test method<\/i> (MOD) <\/p>\n<p>In addition, symbols which denote the degree of correspondence in the contents between the relevant International Standard and <strong>JIS<\/strong> are IDT (identical), MOD (modified), and NEQ (not equivalent) according to <strong>ISO\/ IEC Guide 21-1.<\/strong><\/p>\n","protected":false},"excerpt":{"rendered":"<p><b>Knoop hardness test- Part 1: Test method<\/b><\/p>\n<table style=\"width: 100%\" border=\"0\" cellspacing=\"0\" cellpadding=\"0\">\n<tbody>\n<tr>\n<td>Published By<\/td>\n<td>Publication Date<\/td>\n<td>Number of Pages<\/td>\n<\/tr>\n<tr>\n<td><a href=\"https:\/\/pdfstandards.shop\/product-category\/publishers\/jis\/\"><b>JIS<\/b><\/a><\/td>\n<td>2020-12-21<\/td>\n<td>35<\/td>\n<\/tr>\n<\/tbody>\n<\/table>\n","protected":false},"featured_media":662620,"template":"","meta":{"rank_math_lock_modified_date":false,"ep_exclude_from_search":false},"product_cat":[1088,2655],"product_tag":[],"class_list":{"0":"post-662607","1":"product","2":"type-product","3":"status-publish","4":"has-post-thumbnail","6":"product_cat-77-040-10","7":"product_cat-jis","9":"first","10":"instock","11":"sold-individually","12":"shipping-taxable","13":"purchasable","14":"product-type-simple"},"_links":{"self":[{"href":"https:\/\/pdfstandards.shop\/wp-json\/wp\/v2\/product\/662607","targetHints":{"allow":["GET"]}}],"collection":[{"href":"https:\/\/pdfstandards.shop\/wp-json\/wp\/v2\/product"}],"about":[{"href":"https:\/\/pdfstandards.shop\/wp-json\/wp\/v2\/types\/product"}],"wp:featuredmedia":[{"embeddable":true,"href":"https:\/\/pdfstandards.shop\/wp-json\/wp\/v2\/media\/662620"}],"wp:attachment":[{"href":"https:\/\/pdfstandards.shop\/wp-json\/wp\/v2\/media?parent=662607"}],"wp:term":[{"taxonomy":"product_cat","embeddable":true,"href":"https:\/\/pdfstandards.shop\/wp-json\/wp\/v2\/product_cat?post=662607"},{"taxonomy":"product_tag","embeddable":true,"href":"https:\/\/pdfstandards.shop\/wp-json\/wp\/v2\/product_tag?post=662607"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}