{"id":2160,"date":"2026-03-20T08:34:38","date_gmt":"2026-03-20T00:34:38","guid":{"rendered":"https:\/\/jtlcnc.com\/?p=2160"},"modified":"2026-03-20T08:34:39","modified_gmt":"2026-03-20T00:34:39","slug":"precision-granite-global-standard-for-modern-metrology-and-inspection-laboratories-and-in-depth-analysis-of-its-technical-characteristics","status":"publish","type":"post","link":"https:\/\/jtlcnc.com\/fr\/2026\/03\/20\/precision-granite-global-standard-for-modern-metrology-and-inspection-laboratories-and-in-depth-analysis-of-its-technical-characteristics\/","title":{"rendered":"Precision Granite: Global Standard for Modern Metrology and Inspection Laboratories and In-depth Analysis of Its Technical Characteristics"},"content":{"rendered":"

Precision granite serves as the global benchmark material in modern metrology and inspection laboratories, as well as in the field of hianufacturing equipment. Its core value stems from the extreme structural stability endowed by hundreds of millions of years of geological aging\u2014a characteristic that makes it the “ideal reference surface” for measuret the micron and even nanometer level.<\/p>\n\n\n\n

From a technical perspective, the advantages of precision granite are concentrated in four key areas:<\/p>\n\n\n\n

Ultra-stable precision retention: Through hundreds of millionss of natural aging and artificial processes to release internal stresses, dimensional wear is \u22640.3\u03bcm over 10 years, and precision drift is 0.2\u03bcm over 5 years, with a precision retention cycle far longer than traditional metal materials;<\/p>\n\n\n\n

Extremely low coefficient of thermal expansion: Approximately 4.6\u00d71\/\u2103, which is only 1\/3 to 1\/4 that of cast iron and 1\/4 that of aluminum; deformation is controlled at the micron level under temperature fluctutions of \u00b12\u2103, demonstrating strong environmental adaptability;<\/p>\n\n\n\n

Unique physical compatibility: With a Mohs hardness of 6\u20137 and a surface roughness reaching .02\u03bcm, it is non-magnetic and insulating. Its vibration damping capability is 40% higher than cast iron, providing an “interference-resistant stable foundation” for high-precision me;<\/p>\n\n\n\n

Excellent chemical weather resistance: Water absorption rate < 0.1%, with mass loss rate \u22641% against common laboratory acid-base reagents and organic solvents, allowing itin precision in harsh chemical environments.<\/p>\n\n\n\n

From an industrial and standards perspective, international standards such as ISO 8512-2 and ASME B89.3.7ve listed it as the preferred material for precision measurement benchmarks. Core products of top global metrology equipment manufacturers like Hexagon and Wenzel all adopt an all-granite structue, and over 90% of high-precision Coordinate Measuring Machines (CMMs) worldwide use it as the reference platform\u2014marking it as a core foundational component of gh-precision manufacturing and quality control systems.<\/p>\n\n\n\n

    \n
  1. Introduction: The Stringent Requirements for Reference Materials in Metrology Laboratories
    The core mission of metrology and testing oratories is to “ensure the accuracy, consistency, and traceability of measurement results”\u2014this is not only the foundation of product quality control but also a prerequisite for the synergy of global muring supply chains. To achieve this goal, reference platforms must meet requirements far exceeding those of ordinary industrial materials:<\/li>\n<\/ol>\n\n\n\n

    Long-term dimensional stability: Over decades of service life, no perceptible deformshould occur due to internal stress release, environmental fluctuations, or mechanical wear; otherwise, it would lead to systematic biases in all measurement data based on the platform;<\/p>\n\n\n\n

    Low environmental sensitivity:nvironmental interference factors such as temperature, humidity, and vibration must be minimized to maintain sufficient measurement accuracy even in non-temperature-controlled workshop environments;<\/p>\n\n\n\n

    Interference resistance: No additional proties such as magnetism or conductivity should be generated to avoid signal interference with sensitive instruments like magnetic measuring instruments and semiconductor testing equipment;<\/p>\n\n\n\n

    Wear resistance and chemical stability: Must withstand mechanical wear from hiequency workpiece placement and dragging, while resisting corrosion from common laboratory acids, bases, and organic solvents to ensure precision does not degrade over time.<\/p>\n\n\n\n

    For over a century, ciron was the mainstream material for metrology reference platforms\u2014it possesses relatively high mechanical strength and mature forming processes, but its inherent defects have always been insurmountable: First, the intress release cycle is extremely long; even after artificial aging treatment, it requires years or even decades to stabilize, making it prone to creep deformation during long-term use. Secot has a high coefficient of thermal expansion (approximately 11.5\u00d710\u207b\u2076\/\u2103); a temperature fluctuation of 1\u2103 can cause a deformtion of 11.5\u03bcm in a 1-meter-long cast iron platform, which is a non-negligible error for micrometer-level measurements. Third, it is easily magnetizand prone to rusting, resulting in high maintenance costs, and magnetic remanence can interfere with high-precision magnetic measuring equipment.<\/p>\n\n\n\n

    It was not until the mid-2 century, as manufacturing precision requirements leaped from the millimeter to the micrometer level, that precision granite gradually replaced cast iron to become the preferred reference material for global metrology laboratoriesis shift was not accidental: the crystalline structure of granite has been naturally densified over hundreds of millions of years of geological action, with internal stresses fully released, fundamentally solving the stabilityin points of traditional materials, and its comprehensive performance perfectly matches the stringent demands of modern metrology.<\/p>\n\n\n\n

    \"\"<\/figure>","protected":false},"excerpt":{"rendered":"

    Precision granite serves as the global benchmark material in modern metrology and inspection laboratories, as well as in the field of hianufacturing equipment. Its core value stems from the extreme structural stability endowed by hundreds of millions of years of geological aging\u2014a characteristic that makes it the “ideal reference surface” for measuret the micron and…<\/p>","protected":false},"author":1,"featured_media":1293,"comment_status":"open","ping_status":"open","sticky":false,"template":"","format":"standard","meta":{"_seopress_robots_primary_cat":"none","_seopress_titles_title":"","_seopress_titles_desc":"","_seopress_robots_index":"","_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":"","_kad_post_title":"","_kad_post_layout":"","_kad_post_sidebar_id":"","_kad_post_content_style":"","_kad_post_vertical_padding":"","_kad_post_feature":"","_kad_post_feature_position":"","_kad_post_header":false,"_kad_post_footer":false,"_kad_post_classname":"","footnotes":""},"categories":[35],"tags":[],"class_list":["post-2160","post","type-post","status-publish","format-standard","has-post-thumbnail","hentry","category-news"],"taxonomy_info":{"category":[{"value":35,"label":"NEWS"}]},"featured_image_src_large":["https:\/\/jtlcnc.com\/wp-content\/uploads\/2026\/01\/\u65b9\u5c3a2.jpg",475,356,false],"author_info":{"display_name":"jinxing6611@gmail.com","author_link":"https:\/\/jtlcnc.com\/fr\/author\/jtlcnc\/"},"comment_info":0,"category_info":[{"term_id":35,"name":"NEWS","slug":"news","term_group":0,"term_taxonomy_id":35,"taxonomy":"category","description":"","parent":0,"count":119,"filter":"raw","cat_ID":35,"category_count":119,"category_description":"","cat_name":"NEWS","category_nicename":"news","category_parent":0}],"tag_info":false,"_links":{"self":[{"href":"https:\/\/jtlcnc.com\/fr\/wp-json\/wp\/v2\/posts\/2160","targetHints":{"allow":["GET"]}}],"collection":[{"href":"https:\/\/jtlcnc.com\/fr\/wp-json\/wp\/v2\/posts"}],"about":[{"href":"https:\/\/jtlcnc.com\/fr\/wp-json\/wp\/v2\/types\/post"}],"author":[{"embeddable":true,"href":"https:\/\/jtlcnc.com\/fr\/wp-json\/wp\/v2\/users\/1"}],"replies":[{"embeddable":true,"href":"https:\/\/jtlcnc.com\/fr\/wp-json\/wp\/v2\/comments?post=2160"}],"version-history":[{"count":1,"href":"https:\/\/jtlcnc.com\/fr\/wp-json\/wp\/v2\/posts\/2160\/revisions"}],"predecessor-version":[{"id":2163,"href":"https:\/\/jtlcnc.com\/fr\/wp-json\/wp\/v2\/posts\/2160\/revisions\/2163"}],"wp:featuredmedia":[{"embeddable":true,"href":"https:\/\/jtlcnc.com\/fr\/wp-json\/wp\/v2\/media\/1293"}],"wp:attachment":[{"href":"https:\/\/jtlcnc.com\/fr\/wp-json\/wp\/v2\/media?parent=2160"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/jtlcnc.com\/fr\/wp-json\/wp\/v2\/categories?post=2160"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/jtlcnc.com\/fr\/wp-json\/wp\/v2\/tags?post=2160"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}