"Photovoltaic Tin-Coated Solder Strip" is an industry standard implemented on October 1, 2017. As the current industry standard of the China Photovoltaic Industry Association, the product marking should be indicated in the order of substrate width, substrate thickness, total thickness, substrate brand, coating code and standard number. The marking example is as follows:<\/p>\n
Example: 2.00\u00d70.15\/0.20 TU1 63A GB\/T XXXXX\u2014XXXX<\/p>\n
The tin-coated solder strip with a total thickness of 0.2 mm is produced using a TU1 copper substrate with a width of 2 mm, a thickness of 0.15 mm, and a coating grade of ZHLSn63PbA solder.<\/p>\n
Appearance<\/strong><\/p>\n The surface of the tin-coated solder strip should be flat, clean and smooth, and should be free of oil stains, black spots, scratches, inclusions, delamination and distortion.<\/p>\n The coating is uniform, the surface should be bright metal, without corrosion spots, exposed copper, cracks, dirt and oxide layer, no tin nodules and burrs exceeding the thickness and width tolerances, the number of pinholes and tin slag shall not exceed 3\/10cm long and the single area of pinholes and tin slag shall be less than 0.5mm2, and there shall be no continuous burrs on the edges.<\/p>\n Coating thickness<\/strong><\/p>\n The allowable deviation of single-sided coating thickness is \u00b15\u03bcm, and the specific thickness is determined by negotiation between the supplier and the buyer.<\/p>\n Dimensions and tolerances<\/strong><\/p>\n The external dimensions and allowable deviations of tin-coated solder strips shall comply with the requirements in the following table.<\/p>\n The dimensions and allowable deviation of the soldering strip are in millimeters.<\/strong><\/p>\n Only suitable for fixed length tinned solder strip<\/td>\n<\/tr>\n<\/tbody>\n<\/table>\n Side curvature<\/strong><\/p>\n The side curvature of tin-coated solder strips for manual and automatic welding should be less than or equal to 5mm\/m.<\/p>\n Chemical composition<\/strong><\/p>\n Chemical composition of raw materials<\/p>\n The chemical composition of copper used as base material shall comply with the provisions of GB\/T 5231, the copper base material of interconnection ribbon shall meet the requirements of oxygen-free copper of TU1 or better, and the copper base material of busbar ribbon shall meet the requirements of oxygen-free copper of T1 or better. The composition of tin-lead solder used as coating material (except copper element) shall comply with the provisions of GB\/T 8012. The composition of lead-free tin-based solder shall comply with the provisions of YS\/T 747. The silver content of silver-containing solder shall be within the range of \u00b10.5% of the nominal value, and the special composition solder shall be determined by negotiation between the supply and demand parties. The copper content of solder shall be controlled during the tin coating production process so that the copper content in the interconnection ribbon coating shall not exceed 0.4%, and the copper content in the busbar coating shall not exceed 0.5%.<\/p>\n Chemical composition of tin-coated solder strip finished product<\/p>\n The (copper + silver) content of the copper substrate marked with the brand name of the finished tin-coated solder strip shall comply with the provisions of GB\/T 5231, and the content of tin, lead, silver or other alloy elements in the solder coating marked with the coating code shall comply with the provisions of GB\/T 8012 or YS\/T 747. The limit of impurity elements in the finished tin-coated solder strip shall comply with the requirements of the copper substrate marked with the brand name in GB\/T 5231 and the solder marked with the coating code in GB\/T 8012 or YS\/T 747. For the common impurity element limit values in the copper substrate marked with the brand name and the solder marked with the coating code, the larger value of the two values shall be taken.<\/p>\n Mechanical properties<\/strong><\/p>\n The tensile strength (Rm), elongation after fracture (A) and specified plastic extension strength (Rp0.2) of the tin-coated solder strip shall comply with the requirements of the following table.<\/p>\n Mechanical properties of tin-coated solder strips<\/strong><\/p>\n Electrical properties<\/strong><\/p>\n The electrical properties of tin-coated solder ribbons (including interconnect ribbons and bus ribbons) should meet the following requirements: R20\uff1cRCu.<\/p>\n Corrosion resistance<\/strong><\/p>\n After 48 hours of neutral salt spray test, the tin-coated solder strip shall be rated according to the provisions of GB\/T 6461, and the protection rating (RP) shall be 10; in the appearance rating (RA), the total defect area of spots and local color changes (darkening) on the surface of the tin-coated solder strip shall not be less than level 4, and the surface shall not show yellowing, blackening, peeling, flaking, blistering, cracking, or cracking.<\/p>\n Solderability<\/strong><\/p>\n After welding, the coating and base material should be firmly bonded without stratification, and there should be no different color at the welding point.<\/p>\n If the coating is tin-lead solder, the average peel strength between the tin-coated solder strip and the copper sheet should be greater than or equal to 4.0N\/mm; if the coating is lead-free solder, the average peel strength between the tin-coated solder strip and the copper sheet should be greater than or equal to 3.0N\/mm.<\/p>","protected":false},"excerpt":{"rendered":" "Photovoltaic Tin-Coated Solder Strip" is an industry standard implemented on October 1, 2017. As the current industry standard of the China Photovoltaic Industry Association, product marking should be based on the basic [\u2026]<\/p>","protected":false},"author":1,"featured_media":0,"comment_status":"closed","ping_status":"closed","sticky":false,"template":"","format":"standard","meta":{"site-sidebar-layout":"default","site-content-layout":"default","ast-site-content-layout":"","site-content-style":"default","site-sidebar-style":"default","ast-global-header-display":"","ast-banner-title-visibility":"","ast-main-header-display":"","ast-hfb-above-header-display":"","ast-hfb-below-header-display":"","ast-hfb-mobile-header-display":"","site-post-title":"","ast-breadcrumbs-content":"","ast-featured-img":"","footer-sml-layout":"","theme-transparent-header-meta":"default","adv-header-id-meta":"","stick-header-meta":"","header-above-stick-meta":"","header-main-stick-meta":"","header-below-stick-meta":"","astra-migrate-meta-layouts":"default","ast-page-background-enabled":"default","ast-page-background-meta":{"desktop":{"background-color":"","background-image":"","background-repeat":"repeat","background-position":"center center","background-size":"auto","background-attachment":"scroll","background-type":"","background-media":"","overlay-type":"","overlay-color":"","overlay-opacity":"","overlay-gradient":""},"tablet":{"background-color":"","background-image":"","background-repeat":"repeat","background-position":"center center","background-size":"auto","background-attachment":"scroll","background-type":"","background-media":"","overlay-type":"","overlay-color":"","overlay-opacity":"","overlay-gradient":""},"mobile":{"background-color":"","background-image":"","background-repeat":"repeat","background-position":"center center","background-size":"auto","background-attachment":"scroll","background-type":"","background-media":"","overlay-type":"","overlay-color":"","overlay-opacity":"","overlay-gradient":""}},"ast-content-background-meta":{"desktop":{"background-color":"var(--ast-global-color-5)","background-image":"","background-repeat":"repeat","background-position":"center center","background-size":"auto","background-attachment":"scroll","background-type":"","background-media":"","overlay-type":"","overlay-color":"","overlay-opacity":"","overlay-gradient":""},"tablet":{"background-color":"var(--ast-global-color-5)","background-image":"","background-repeat":"repeat","background-position":"center center","background-size":"auto","background-attachment":"scroll","background-type":"","background-media":"","overlay-type":"","overlay-color":"","overlay-opacity":"","overlay-gradient":""},"mobile":{"background-color":"var(--ast-global-color-5)","background-image":"","background-repeat":"repeat","background-position":"center center","background-size":"auto","background-attachment":"scroll","background-type":"","background-media":"","overlay-type":"","overlay-color":"","overlay-opacity":"","overlay-gradient":""}},"footnotes":""},"categories":[19],"tags":[233],"class_list":["post-8340","post","type-post","status-publish","format-standard","hentry","category-blog","tag-guangfuchanye"],"_links":{"self":[{"href":"https:\/\/www.ray-tron.com\/en\/wp-json\/wp\/v2\/posts\/8340","targetHints":{"allow":["GET"]}}],"collection":[{"href":"https:\/\/www.ray-tron.com\/en\/wp-json\/wp\/v2\/posts"}],"about":[{"href":"https:\/\/www.ray-tron.com\/en\/wp-json\/wp\/v2\/types\/post"}],"author":[{"embeddable":true,"href":"https:\/\/www.ray-tron.com\/en\/wp-json\/wp\/v2\/users\/1"}],"replies":[{"embeddable":true,"href":"https:\/\/www.ray-tron.com\/en\/wp-json\/wp\/v2\/comments?post=8340"}],"version-history":[{"count":0,"href":"https:\/\/www.ray-tron.com\/en\/wp-json\/wp\/v2\/posts\/8340\/revisions"}],"wp:attachment":[{"href":"https:\/\/www.ray-tron.com\/en\/wp-json\/wp\/v2\/media?parent=8340"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/www.ray-tron.com\/en\/wp-json\/wp\/v2\/categories?post=8340"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/www.ray-tron.com\/en\/wp-json\/wp\/v2\/tags?post=8340"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}\n\n
\n Thickness tolerance<\/td>\n Width tolerance<\/td>\n Length tolerance<\/td>\n<\/tr>\n \n \u00b10.01<\/td>\n \u00b10.08<\/td>\n \u00b11.0<\/td>\n<\/tr>\n \n Note: Special specifications and requirements can be implemented according to the contract<\/p>\n \n\n
\n Tinned solder strip thickness mm<\/td>\n type<\/td>\n Tensile strength (Rm) MPa<\/td>\n Elongation after fracture (A) %<\/td>\n Specified plastic elongation strength (Rp0.2) MPa<\/td>\n<\/tr>\n \n >0.15<\/td>\n Interconnection ribbon<\/td>\n Soft<\/td>\n \u2265150<\/td>\n \u226525<\/td>\n Determined by negotiation between the supply and demand parties<\/td>\n<\/tr>\n \n Super soft<\/td>\n \u2265130<\/td>\n \u226520<\/td>\n Determined by negotiation between the supply and demand parties<\/td>\n<\/tr>\n \n Converging belt<\/td>\n —<\/td>\n \u2265170<\/td>\n \u226525<\/td>\n —<\/td>\n<\/tr>\n \n \u22640.15<\/td>\n Interconnection ribbon<\/td>\n Soft<\/td>\n \u2265110<\/td>\n \u226515<\/td>\n Determined by negotiation between the supply and demand parties<\/td>\n<\/tr>\n \n Super soft<\/td>\n \u2265110<\/td>\n \u226515<\/td>\n Determined by negotiation between the supply and demand parties<\/td>\n<\/tr>\n \n Converging belt<\/td>\n —<\/td>\n \u2265120<\/td>\n \u226518-<\/td>\n —<\/td>\n<\/tr>\n<\/tbody>\n<\/table>\n