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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A number in parentheses indicates the year of last reapproval. The two specifications have virtually identical coating thickness requirements.
ASTM F – Portland Bolt
F — 05 Standard Speci? It does not cover asstm fasteners that are centrifuged or otherwise handled to remove excess zinc. ASTM A This specification covers the requirements for hot-dip galvanizing on iron and steel products made from rolled pressed and forged shapes, castings, plates, bars, and strips.
Rejection and Rehearing Packaging and Package Marking 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.
Leave a Reply Cancel reply Your email address will not be published. ASTM F The standard specification that 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 asmt process. Minor roughness that does not impair the intended use of the part, or roughness that is related to the uncoated surface condition of the part, shall not constitute grounds for rejection of the parts.
Work Item s – proposed revisions of this standard. The coating thickness requirements of A Table 1 meet or exceed those of F Table 2 except for: It is not a dip spin coating like hot dip galvanizing is.
Sal- Are you asking which galvanizing standard you should be using? The type of production lot process will determine which column should be referenced for the sample size of each inspection criteria, as summarized in the table below, or per the F Sampling Plan Flow Chart. When requested by the purchaser, the average galvanizing temperature that the fasteners will be subjected to shall be furnished.
This abstract is a brief summary of the referenced standard. Suppliers shall furnish certified test results from which the shipping f2239 originated. If the customer specifies, the galvanizer will be required to provide the average galvanizing temperature the fasteners will be exposed to. Afif — The difference between hot dip galvanizing structural articles and fasteners is the spinning.
The packaging shall comply with the purchaser requirements.
Hot-Dip Galvanizing Specifications – Portland Bolt
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. The dull appearance shall not be cause for rejection. The average of those selected measurements is the average coating thickness.
NOTE 2—Hot-dip washers tend to bond to each other. ASTM A A covers galvanizing on many products including fasteners, while F is specific to threaded fasteners, nuts and washers. Rob- Tensioning the bolt will not adversely affect the galvanizing. Phil- The hot dip galvanizing process is more or less the same within all of those standards, the difference is how they are handled.
Fasteners which are subjected to severe work hardening must be stress-relieved prior to galvanizing. One of our experienced sales reps will be happy to answer any of your questions. Any insights would be deeply appreciated. All the ASTM fastener standards refer to F for hot dip galvanizing, so that would be the most appropriate standard to reference. Your comments are invited either for revision of this standard or for additional standards and should be addressed to ASTM International Headquarters.
Best practice v2329 to note the bath temperature when galvanizing steel to F, although only the average bath temperature is required. All inspections and tests shall be made at the place of manufacture prior to shipments, unless otherwise speci? I am having difficulty determining the hot dip zinc coating needed for an anchor bolt 60M 60mm and 1.
Gagan- Sometimes the heat from the hot dip galvanizing operation can slightly soften small hardened items like this. ASTM A does not astk threaded bolts and fasteners.
Fasteners and nuts over 3? The wstm in the types of lots entail different sampling plans, which specify the number of test articles for performing various test methods during astmm of the finished product. The number of specimens to be tested per order shall be as speci? In no case shall the average reading of a single specimen be below the average thickness shown in the Average Thickness on Individual Specimen column.
According to F Paragraph 5.
ASTM F2329 vs. ASTM A153
If required by the product standard or by the purchaser, mechanical descaling with or without? This specification covers the requirements for hot-dip galvanizing on iron atsm steel products made from rolled pressed and forged shapes, castings, plates, bars, and strips. 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.