Zinc Coating Thickness Requirements: ASTM A vs. F Dimension. ASTM A ASTM F Avg. Coating. Thickness of. Specimens. Tested. ASTM F covers the requirements for hot-dip zinc coating applied to carbon steel and alloy steel bolts, screws, washers, nuts, and special. ASTM A does not cover threaded bolts and fasteners. ASTM A and F are the ASTM specifications that cover the requirements for.
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Asrm For test method, v2329 Leave a Reply Cancel reply Your email address will not be published. ASTM does not give any warranty express or implied or make any representation that the contents of this abstract are accurate, complete or up to date. The information provided herein is not intended as a representation or warranty on the part of the AGA. ASTM A A covers galvanizing on many products including fasteners, while F is specific to threaded fasteners, nuts and washers. ASTM F describes two different sampling plans for batch lots and production lots.
Threaded fasteners are handled differently in order to remove the excess zinc from the threads and would fall under A or F If you feel that your comments have not received a fair hearing you should make your views known to the ASTM Committee on Standards, at the address shown below. It also provides for minor coating repairs.
This specification covers the requirements for hot-dip zinc coating applied to carbon steel and alloy steel bolts, screws, washers, nuts, and special threaded fasteners applied by the hot-dip coating process. In no case shall the average of the measurements be below the average thickness shown in the Average Thickness on Individual Specimen column see April 10, Authored by Alana Hochstein.
If you are concerned about the hardness dropping, you could look at alternatives platings that do not require heat, like mechanical galvanizing. This process involves the removal of excess zinc by spinning the parts in a centrifuge, or brushing the threaded portion, or handling otherwise to remove the excess zinc.
Afif — The difference between hot dip galvanizing structural articles and fasteners is the spinning. Dane- Thanks for response.
Individual reprints single or multiple copies of this standard may be obtained by contacting ASTM at the above address or at phonefaxor service astm.
ASTM F2329 vs. ASTM A153
In case the geometry of the specimen does not permit? Many thanks Sal from Dubai. Therefore, it must be clarified whether the plant has the ability d2329 lubricate hardware after hot-dip galvanizing.
It is important to ensure the customer specifies which type of lot is required. There are three columns listing the number of test articles for three different inspection tests required under F Link to Active This link will always route to the current Active version of the standard. A summary of the numerical differences between the two specifications related to coating thickness requirements for all materials is presented in the table: The selection of the sampling plan shall be in aztm with Guide F Furthermore, there are two types of production lots: Nails and rivets are not included in this specification.
Beams and structural members are defined as steel products and are galvanized per A The major differences between the two specifications, described below, include topics related to sampling protocol, coating thickness, inspection, embrittlement, and documentation.
Hot-Dip Galvanizing Specifications
If your requirement is for hot dip galvanizing, electroplating would not be sufficient. F329 galvanizing bolts, that will be used for Sub-Sea hydratightightening using AquaMax jacks permissible, or would the stretching of the bolt under tension remove the galvanized warranty. Anyone making use of this information assumes all liability arising from such use.
Since threaded fasteners are spun at high ff2329 in a centrifuge to remove excess zinc from the threads, they would fall under the A class C specification.
This standard is subject to revision at any time by the responsible technical committee and must be reviewed every? Materials and Manufacture 5. The two specifications have virtually identical coating thickness requirements.
Spinning removes excess zinc from the fastener so that the nut will mate with the bolt. Also, A and F have different aztm requirements; F requires more samples per lot than A Any insights would be deeply appreciated. It is the responsibility of the user of this standard to ast, appropriate safety and health practices and determine the applicability of regulatory limitations prior to use.
F defines the two different lots and their associated sampling plans as follows:. Packaging and Package Marking Your email address will not be published. Sal- Are you asking which galvanizing standard you should be using? 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.
The acceptance number in all cases is zero defects. These requirements are established by the applicable product f229, such as Speci?
ASTM F vs. ASTM A | American Galvanizer’s Association
The test methods for appearance and smoothness under F shall be conducted for every batch lot by visual inspection in accordance with methods provided in A A and F again are more or less the same, F references back to the processes in A, but goes into more detail with respect to the specifics of threaded fasteners. ASTM A does not cover threaded bolts and fasteners. Galvanizing fasteners in accordance with A, will usually meet or exceed the requirements of F, because F defers to A in many sections.
If the customer specifies, the galvanizer will be required to provide the average galvanizing temperature the fasteners will be exposed to.