{"id":322,"date":"2014-07-17T10:17:32","date_gmt":"2014-07-17T10:17:32","guid":{"rendered":"http:\/\/kirextechno.com\/en\/?p=322"},"modified":"2014-07-22T12:02:24","modified_gmt":"2014-07-22T12:02:24","slug":"17-july-2014-custom-fabrication-mechanical-parts-china-important-points-specify","status":"publish","type":"post","link":"https:\/\/kirextechno.com\/en\/17-july-2014-custom-fabrication-mechanical-parts-china-important-points-specify\/","title":{"rendered":"July 17 2014 – Custom fabrication mechanical parts in China: Important points to specify"},"content":{"rendered":"

Custom fabrication mechanical parts in China: Important points to specify<\/h2>\n

Following our article on the importance of technical specifications when purchasing mechanical parts in China, we post here a non-exhaustive list of norms defining several levels of acceptance according to different manufacturing processes.<\/p>\n

We also include the mention\u00a0Important to specify<\/strong><\/em> for cases in which, according to our experience, it is critical to mention a specific standard or detailed requirement in order to guarantee that the parts produced reach your requirement targets.<\/p>\n

<\/h2>\n

 <\/p>\n

Casting: Lost wax casting \/ Investement casting \/ Sand casting<\/span><\/strong><\/h2>\n

Important to specify:<\/strong>\u00a0<\/em> Acceptance level for internal defects of casting parts & Acceptance level for surface defects of casting parts<\/p>\n

Material<\/em><\/p>\n

    \n
  • NF-EN A32-054 -> Alloy cast steel for general use<\/li>\n<\/ul>\n

    Internal quality (NDT : non-destructive test)<\/em><\/p>\n

      \n
    • NF-EN-12681 -> X-Ray: internal soundness<\/li>\n
    • NF-EN-12680 -> Ultrasonic test: internal defects & micro-structure<\/li>\n<\/ul>\n

      Surface quality\u00a0 (NDT: non-destructive test)<\/em><\/p>\n

        \n
      • NF-EN-12454 -> Visual control sand casting<\/li>\n
      • NF-EN-1371-2 -> Liquid penetration test for lost wax casting<\/li>\n
      • NF-EN-1371-1 -> Liquid penetration test for sand casting<\/li>\n
      • NF-A04-194 -> Acceptance criteria for casting surface products<\/li>\n
      • NF-EN-1369 -> Particle magnetic test<\/li>\n
      • NF-EN-1370 ->\u00a0 roughness comparator<\/li>\n<\/ul>\n

         <\/p>\n

        Forging & Stamping<\/strong><\/span><\/h2>\n

        Material<\/em><\/p>\n

          \n
        • NF-EN-10250 -> Steel forged parts (non-alloyed, alloy, special alloy)<\/li>\n<\/ul>\n

          Others<\/em><\/p>\n

            \n
          • NF-EN-82-004 -> Hot, mid-hot and cold forged parts<\/li>\n
          • ISO-3266 -> Rod ring class 4 forged steel for lifting applications<\/li>\n
          • ASTM-A105\/A -> Standard specification for carbon steel forgings for piping applications<\/li>\n
          • XP-CEN\/TS-13001 -> Lifting application with high load<\/li>\n<\/ul>\n

             <\/p>\n

            Welding fabrication<\/strong><\/span><\/h2>\n

            Important to specify:<\/strong><\/em> Welding seam heights (a and\/or z height)<\/p>\n

            Geometrical tolerance after welding: specify post-welding machining if necessary<\/p>\n

              \n
            • NF-EN-ISO-5817 -> Welding steel fabrication: quality of weld seam & acceptance criteria<\/li>\n
            • ISO-14327 -> Weldability criteria for alloy steel and metallic products<\/li>\n
            • DIN-EN-ISO-15792-3 -> Welding material penetration criteria<\/li>\n
            • JIS-B-8285: pressure vessel -> Validation criteria for welding seam<\/li>\n<\/ul>\n

               <\/p>\n

              Surface treatment<\/strong><\/span><\/h2>\n

              Important to specify<\/strong>:<\/em> Zinc plating -> thickness in microns, salt spray test (red rust or white rust in hours)<\/p>\n

              Hot dip galvanization: thickness in microns, salt spray test (red rust or white rust in hours)<\/p>\n

                \n
              • DIN-ISO-14713-2 -> Hot dip galvanizing (ISO 14713-22009)<\/li>\n
              • ISO-9227 -> Corrosion tests in artificial atmospheres & Salt spray tests<\/li>\n
              • SAE-AMS-2417H -> Plating zinc-nickel alloys<\/li>\n<\/ul>\n

                 <\/p>\n

                Heat treatment <\/strong><\/span><\/h2>\n

                Important to specify<\/strong>:<\/em> \u00a0Hardness min and max, quench depth and temper requirement (for example: 42-46HRC, 0.2mm to 1.5mm)<\/p>\n

                Minimum hardness deepest point (for example: > 5mm,\u00a0 > 30HRC)<\/p>\n

                Mechanical properties after quenching and tempering (+QT) on sample ladle: tensile strength, yield strengh, A%, resilience (temperature and KV in Joules)<\/p>\n

                  \n
                • Surface quality -> Magnetic particle test for high carbon equivalent alloys<\/li>\n
                • NF-EN-10083-1 -> Steel for quench and tempering<\/li>\n
                • NF-EN-10083-3 -> Bore steel<\/li>\n
                • NF-EN-10085 -> Steel for nitrification<\/li>\n<\/ul>\n

                   <\/p>\n

                  Coating and surface preparation<\/strong><\/span><\/h2>\n

                  Important to specify<\/strong>:<\/em> Surface preparation: shot blasting, sand blasting, surface criteria (for example: SA2.5)<\/p>\n

                  Epoxy\/Polyurethane coating: primer thickness and type in microns, top coat thickness and type in microns<\/p>\n

                  Powder coating: thickness in microns, UV resistance criteria for outdoor use (hours, salt spray test (red rust or white rust in hours)<\/p>\n

                    \n
                  • ISO-11507 -> UV resistance criteria for outdoor use<\/li>\n
                  • ISO-9227 -> Corrosion tests in artificial atmospheres & salt spray tests<\/li>\n
                  • ISO-20567 -> Shock resistance criteria against impacts<\/li>\n<\/ul>\n

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

                    Custom fabrication mechanical parts in China: Important points to specify Following our article on the importance of technical specifications when purchasing mechanical parts in China, we post here a non-exhaustive list of norms defining several levels of acceptance according to different manufacturing processes. We also include the mention\u00a0Important to specify for cases in which, according…<\/p>\n","protected":false},"author":2,"featured_media":264,"comment_status":"open","ping_status":"open","sticky":false,"template":"","format":"standard","meta":{"footnotes":""},"categories":[4],"tags":[],"class_list":["post-322","post","type-post","status-publish","format-standard","has-post-thumbnail","hentry","category-newscast_posts"],"yoast_head":"\nJuly 17 2014 - Custom fabrication mechanical parts in China: Important points to specify - KIREX TECHNO - Mechanical parts<\/title>\n<meta name=\"description\" content=\"Custom fabrication mechanical parts in China : Important points to specify\" \/>\n<meta name=\"robots\" content=\"index, follow, max-snippet:-1, max-image-preview:large, max-video-preview:-1\" \/>\n<link rel=\"canonical\" href=\"https:\/\/kirextechno.com\/en\/17-july-2014-custom-fabrication-mechanical-parts-china-important-points-specify\/\" \/>\n<meta property=\"og:locale\" content=\"en_US\" \/>\n<meta property=\"og:type\" content=\"article\" \/>\n<meta property=\"og:title\" content=\"July 17 2014 - 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