Parts are rack or barrel plated to ASTM B standard thicknesses from ” to “, depending on the base metal and application. Pure % tin is. Designation: B – 97 (Reapproved )e1 Standard Speci?cation for Electrodeposited Coatings of Tin1 This standard is issued under the. ASTM B Standard Specification for Electrodeposited Coatings of Tin.
When necessary, preliminary samples showing the? The goal is to de? Other coatings variations, such as surface appearance type 4. The procedure wstm known as sampling inspection.
A number in parentheses indicates the year of last reapproval. The mechanical forces of the molten solder and tin? Porosity increases as the coating thickness decreases, so that minimum thicknesses must be speci?
Last previous edition approved in as B — 97e1. In normal indoor exposure, tin is protective on iron, steel, nickel, copper, and their alloys. They shall be adherent and visually free of blisters, pits, peeled areas, cracks, nodules, and unplated areas.
This specification covers the requirements for electrodeposited adtm coatings applied to metallic articles to provide a low contact resistance surface, to protect against corrosion, to facilitate soldering, to provide anti-galling properties, and to be a stop-off coating in the nitriding of high-strength steels.
Test Method B contains several plans and also provides instructions for calculating plans to meet special needs.
This standard has been approved for use by agencies of the Department of Defense. Black spots or lines are evidence of mechanical damage or gross defects. Examination of 43 magni? Link to Active This link will always route to the current Active version of the standard. Diffusion may lead to darkening of a thin coating and impairment of its solderability characteristics, particularly after long storage.
Individual reprints single or multiple copies of this standard may be obtained by contacting ASTM at the above address or at phonefaxor service astm. The buyer and seller may agree on xstm plan or plans to be used. If the pores are few in number, or away from signi?
ASTM B | General Metal Finishing
These should be taken into account when designing for special applications. Drying can reverse the reaction.
ASTM International takes no position respecting the validity of any patent rights asserted in connection with any item mentioned in this standard. Also see Note 5. Historical Version s – view previous versions of standard.
B55 is in contrast to strikes or? It is the responsibility of the user of this standard to establish appropriate safety and health practices and determine the applicability of regulatory limitations prior to use. Tin coatings are used to provide a low contact-resistance surface, to protect against corrosion see 1. However, some of these platings cannot be used in contact with food. The test must yield a numerical value, and certain statistical requirements must be met.
Moderate exposure conditions, usually indoors, but more severe than Class B. Such acceptance or pass-fail criteria, if required, should be part of the product speci? Visual examination, time of wetting, measurement of area of spread, and calculation of spread values are used to assess solderability 1, 2. The clamp is attached to a load cell and to a transducer, which transmits a signal to a converter that adjusts the signal to a astn mode analog or digital for the recording instrument, computer, or strip-chart recorder.
However, all matte baths except for stannate baths do require the addition of grainre?
This standard is subject to revision at any time by the responsible technical committee and must be reviewed every?