ASTM_A_1074_-_11_2015.pdf

Designation:A107411(Reapproved 2015)Standard Specification forHot Tin and Hot Tin/Lead Dip on Ferrous and Non-FerrousMetals1This standard is issued under the fixed designation A1074;the number immediately following the designation indicates the year oforiginal adoption or,in the case of revision,the year of last revision.A number in parentheses indicates the year of last reapproval.Asuperscript epsilon()indicates an editorial change since the last revision or reapproval.1.Scope1.1 This specification covers tin and tin/lead coatings ap-plied by the hot dip process on ferrous and non-ferrous metals.hot tin and tin/lead coatings are used to provide a lowcontact-resistance surface,to protect against corrosion,tofacilitate soldering,to provide anti-galling properties,and to bea stop-off coating in the nitriding of high-strength steels.1.2 This specification is intended to be applicable to itemsthat are reflowed,centrifuged or otherwise handled to removeexcess tin or tin/lead bath metal.Coating thickness graderequirements reflect this.1.3 Some corrosion can be expected from tin or tin/leadcoatings exposed outdoors.In normal indoor exposure,tin ortin/lead is protective on iron,steel,nickel,copper,and theiralloys.Corrosion can be expected at discontinuities in thecoating(such as pores)due to galvanic couples formedbetween the tin or the tin/lead and the underlying metal throughthe discontinuities,especially in humid atmospheres.1.4 This specification applies to hot tin dip coatings of notless than 99.8%tin and to hot tin/lead dip coatings of 60 65%tin and the balance lead.1.5 This specification does not apply to electrodepositedcoatings of tin or tin/lead.1.6 The values stated in SI units are to be regarded as thestandard.The values given in parentheses are for informationonly.1.7 This standard does not purport to address all of thesafety concerns,if any,associated with its use.It is theresponsibility of the user of this standard to establish appro-priate safety and health practices and determine the applica-bility of regulatory limitations prior to use.2.Referenced Documents2.1 ASTM Standards:2A902 Terminology Relating to Metallic Coated Steel Prod-uctsB32 Specification for Solder MetalB183 Practice for Preparation of Low-Carbon Steel forElectroplatingB242 Guide for Preparation of High-Carbon Steel for Elec-troplatingB281 Practice for Preparation of Copper and Copper-BaseAlloys for Electroplating and Conversion CoatingsB320 Practice for Preparation of Iron Castings for Electro-platingB322 Guide for Cleaning Metals Prior to ElectroplatingB339 Specification for Pig TinB374 Terminology Relating to ElectroplatingB487 Test Method for Measurement of Metal and OxideCoating Thickness by Microscopical Examination ofCross SectionB499 Test Method for Measurement of Coating Thicknessesby the Magnetic Method:Nonmagnetic Coatings onMagnetic Basis MetalsB504 Test Method for Measurement of Thickness of Metal-lic Coatings by the Coulometric MethodB558 Practice for Preparation of Nickel Alloys for Electro-platingB567 Test Method for Measurement of Coating Thicknessby the Beta Backscatter MethodB568 Test Method for Measurement of Coating Thicknessby X-Ray SpectrometryB571 Practice for Qualitative Adhesion Testing of MetallicCoatingsB602 Test Method for Attribute Sampling of Metallic andInorganic CoatingsB659 Guide for Measuring Thickness of Metallic and Inor-ganic CoatingsB678 Test Method for Solderability of Metallic-CoatedProducts1This specification is under the jurisdiction of ASTM Committee A05 onMetallic-Coated Iron and Steel Products and is the direct responsibility ofSubcommittee A05.13 on Structural Shapes and Hardware Specifications.Current edition approved Oct.1,2015.Published October 2015.Originallyapproved in 2011.Last previous edition approved in 2011 as A1074-11.DOI:10.1520/A1074-11R15.2For referenced ASTM standards,visit the ASTM website,www.astm.org,orcontact ASTM Customer Service at serviceastm.org.For Annual Book of ASTMStandards volume information,refer to the standards Document Summary page onthe ASTM website.Copyright ASTM International,100 Barr Harbor Drive,PO Box C700,West Conshohocken,PA 19428-2959.United States1 B697 Guide for Selection of Sampling Plans for Inspectionof Electrodeposited Metallic and Inorganic CoatingsB762 Test Method of Variables Sampling of Metallic andInorganic CoatingsB849 Specification for Pre-Treatments of Iron or Steel forReducing Risk of Hydrogen EmbrittlementB851 Specification for Automated Controlled Shot Peeningof Metallic Articles Prior to Nickel,Autocatalytic Nickel,or Chromium Plating,or as Final FinishD3951 Practice for Commercial Packaging3.Terminology3.1 Definitions:3.1.1 The following terms and definitions are specific to thisspecification.Many of the terms used in this specification aredefined in Terminologies A902 and B374.3.1.2 sectional,nscreen section for placing articles intothe hot tin dip so that the articles do not stick together3.1.3 significant surface,nthe porti